What the documentation covers for Vue.js

The SPA guide walks through adding the SeaText snippet to your Vue entry point — typically index.html or main.js — and then verifying the script loads without console errors. The guide covers React, Vue, and Angular as supported SPA frameworks. For Vue specifically, the same three-step verification flow applies as for the other frameworks.

The three SPA verification steps from the guide

The public documentation lists three concrete verification steps that apply to every supported SPA framework, including Vue.js:

1. Build and serve: Build and serve your application using the standard commands for your framework (such as npm start, npm run serve, or ng serve).
2. Inspect the page: Open your browser's Developer Tools (F12) and check the Console and Network tabs to verify that the SeaText script loads without errors.
3. Functionality check: Ensure that the SeaText features are functioning as expected within your SPA.

These three steps are the documented baseline for confirming a successful integration. If any step fails, the issue is usually caught before opening a support ticket.

Documented asynchronous-loading, local-storage, and cross-origin considerations

The SPA guide explicitly flags three technical considerations under its "Additional Considerations" section. These are the friction points the documentation itself calls out:

• Asynchronous loading: The snippet includes the async attribute for the script tag, ensuring that the SeaText script loads asynchronously, which helps in maintaining page load performance.
• Local storage usage: The script stores an ID in the local storage. Ensure that your application has the necessary permissions to access and use local storage.
• Cross-origin considerations: If your SPA interacts with multiple domains, ensure that the SeaText script is compatible and does not face cross-origin issues.

These three items are the only integration considerations the public documentation names directly. Any other failure pattern — such as router guards, CSP headers, or pre-DOM execution — falls outside the documented troubleshooting scope.

How to reach the support team

The FAQ page explicitly states: "If you have further inquiries, please reach out to our support team for assistance." This is the only direct support channel referenced in the public documentation. The FAQ directs users to the support team for further inquiries. Access to the support team is tied to your SeaText account and plan level; the marketing pages describe a free pilot that starts without payment until results are proven, after which paid plans activate dedicated help.

Information to include when you report an issue

Because the widget runs outside Vue's component tree, the support team needs context that generic tickets often miss. Always provide your Vue version, build tool (Vite, Vue CLI, Webpack), the exact snippet placement (index.html vs main.ts), and any console errors or network failures. If translations fail on route changes, note whether you use Vue Router navigation guards to trigger re-translation. A minimal reproduction repo or sandbox link dramatically shortens resolution time.

Common integration failure patterns

The public documentation names three considerations: asynchronous loading, local storage permissions, and cross-origin issues. Beyond those, the following patterns appear frequently in Vue.js projects and are worth checking before opening a ticket:

• Snippet runs before DOM ready — the async script executes but the mount point isn't present yet. (Expert tip, not documented troubleshooting.)
• Missing router guards — translations don't update after route changes because SeaText isn't notified. (Expert tip, not documented troubleshooting.)
• CSP headers block the script — the external SeaText domain must be allowlisted in script-src. (Expert tip, not documented troubleshooting.)

These three items are practical expert tips drawn from common SPA integration experience, not items that appear in the docs or FAQ. The documented troubleshooting scope is limited to async loading, local storage, and cross-origin.

Integration engineer note: diagnostic guidance for Vue.js projects

When a Vue.js integration fails after the snippet is installed, a structured diagnostic sequence saves hours of back-and-forth. Here is the workflow I recommend for Vue projects specifically:

1. Confirm the snippet is in the right place. Open index.html and verify the SeaText script sits inside the <body> tag, not the <head>. If you placed it in main.js or main.ts, confirm it runs after the Vue app mounts.
2. Check the Network tab for the script request. Filter for "seatext" and confirm a 200 status. A 404 or blocked request points to a deployment or CSP issue.
3. Check the Console for initialization logs. SeaText logs its initialization. Missing logs mean the script never executed.
4. Test local storage access. Open DevTools → Application → Local Storage and confirm the site can write. Private browsing or strict privacy settings will block the ID storage the script needs.
5. Test cross-origin behavior. If your app runs on multiple domains, load the page on each domain and confirm the script loads consistently.
6. Test route changes. Navigate between routes and watch for translation updates. If translations don't refresh, you likely need a Vue Router afterEach hook to notify SeaText.

Running through these six checks resolves the majority of Vue.js integration issues without needing to contact support. If the problem persists after all six, gather your findings and reach out to the support team via the FAQ's instruction.

Self-service resources beyond the SPA guide

The help center includes pages on AI scope configuration, variant management, A/B testing mechanics, and the variant editor. For large sites there's an "Implementation Guide for Large Websites" that addresses rollout sequencing and caching. The FAQ also answers questions about mixing SeaText with other translators, controlling what the AI changes, and the meaning of "version" in the variant system.

Plan-level differences in support access

SeaText's public pages describe a "Start free — You don't pay till we prove results" model. The free pilot includes the snippet and basic agents. Paid plans unlock the full agent suite (Google Ads, Bot Refund, Translation, etc.). The enterprise demo request form on the blog collects name, website, email, and topic — suggesting a sales-engineering path for high-volume or custom integrations.

Key facts

Limitations of the public information

The public documentation does not publish SLA response times, dedicated Slack or Discord communities, GitHub issue trackers for an npm package, or tiered email/phone support matrices. Those details — if they exist — live behind the login or sales conversation. Treat the FAQ's "reach out to our support team" as the only confirmed escalation path until your account manager provides a plan-specific contact.

Terminology quick reference

• SPA snippet — the async <script> tag SeaText provides; it loads the widget outside any framework lifecycle.
• Entry point — the file where your Vue app mounts (main.js, main.ts, or index.html).
• Router guard — a Vue Router hook (afterEach) used to tell SeaText the page changed so it can re-translate.
• Variant — an AI-generated copy version that SeaText tests against the original; winners are kept automatically.
• Agent — a specialized AI module (Translation, Google Ads, Bot Refund, etc.) you activate per project.

Frequently asked follow-up questions

Does SeaText have a public Discord or community forum?

Not mentioned in the documentation, FAQ, or marketing pages reviewed. The only public self-service channel is the help center.

Can I file GitHub issues for an npm package?

The public documentation does not reference a public npm package or GitHub repository for SeaText. Integration is via the hosted snippet, not a local dependency.

What happens if I'm on the free pilot and hit a blocking bug?

The FAQ directs all users to the support team. The pilot page says "You don't pay till we prove results," implying support is available during the trial, but no SLA is published.

How do I prove the snippet loads correctly in a Vue + Vite project?

Run npm run dev, open Chrome DevTools → Network tab, filter for "seatext", confirm 200 status. Then check Console for SeaText initialization logs. The SPA guide lists this exact verification flow.

Do I need a separate SeaText project per environment (dev/staging/prod)?

The docs don't specify. A common pattern is one project ID per environment so analytics and variant tests stay isolated; store the ID in VITE_SEATEXT_PROJECT_ID and inject it at build time.

Will SeaText support help me write router guards for re-translation?

The SPA guide mentions Vue Router guards as a best practice but doesn't provide code. Support can review your guard implementation if you share the relevant router/index.js snippet and the SeaText method you're calling.

Is there an enterprise SLA for uptime or support response?

Not in the public sources. The enterprise demo request form suggests custom agreements are negotiated per account.

What support channels are confirmed by the public documentation?

Three paths are confirmed: the documentation at seatext.com/documentation-general-integration, the support team via the FAQ's instruction, and the enterprise demo request form. No other channels are confirmed by the reviewed public pages.

Why Loading Timing Matters in SPAs

SeaText interacts with the DOM as soon as it loads. If the script runs before the framework renders the first view, it can still wait for the DOM to be ready because it runs asynchronously. However, if the script loads after the first render, the engine may have already missed the chance to translate or protect that initial view, leading to inconsistent user experience.

Missing the first view can show untranslated headlines, offers, or bot‑proof elements to visitors, which reduces conversion trust and may trigger false fraud signals. Early loading guarantees that every visitor sees the fully processed page from the very first paint.

How Async Script Loading Actually Works

The snippet includes the async attribute, which tells the browser to fetch the script without blocking HTML parsing. While the script downloads, the browser continues to build the DOM. When the download finishes, the script may execute before the DOM parsing is complete.

Because execution can happen before the DOM is ready, you should place the snippet in the entry HTML file so it loads early, but verify after the framework mounts that SeaText is active. Use DevTools → Console to look for any SeaText‑related messages and the Network tab to confirm the script file returned a 200 status.

Framework‑Specific File Paths and Commands

React (Create React App): place the snippet in public/index.html just before the closing tag. Run npm start to serve the app.

Vue (Vue CLI): insert the snippet in public/index.html (or index.html at the project root) before . Serve with npm run serve.

Angular (Angular CLI): add the snippet to src/index.html before . Serve with ng serve.

In each case, after the dev server starts, open Developer Tools, go to the Network tab, filter by JS, and verify that the SeaText script URL loads with a 200 response. Then check the Console for any errors related to SeaText.

Decision Framework: Readiness Checklist

• Confirm the snippet is added to the entry HTML file.
• Verify the async attribute is present.
• Check that local storage access is allowed in your CSP.
• Ensure no cross‑origin blocks if you call APIs from other domains.
• Run the app and open DevTools → Console/Network to see the script load without 404.
• After the app mounts, check the Console for any SeaText‑related errors and verify the script is listed in the Network tab.

CSP and Cross‑Origin Troubleshooting

If your site uses a Content Security Policy, the script‑src directive must allow the SeaText domain (usually cdn.seatext.ai). Add it as script-src 'self' https://cdn.seatext.ai; or use a nonce/hash if required.

Cross‑origin issues appear when the SPA makes API calls to a different sub‑domain while the SeaText script is hosted on another domain. Ensure the script is served via CORS‑enabled headers or host it on the same origin via a proxy.

To test, open the Network tab, look for the script request, and verify that the response headers include Access-Control-Allow-Origin: * or your specific origin. In the Console, any CSP violation will be reported with details about the blocked resource.

Common Misconfigurations and How to Fix Them

Missing async attribute: without it, the script can block page rendering, slowing down the first paint. Add async to the script tag.

Placing the snippet after the framework’s mount point: if you insert it inside a component that loads later, the script may miss the initial render. Keep it in the root HTML file.

Blocking local storage: some CSP configurations forbid local storage access. Ensure the policy includes storage-src 'self' or allows the SeaText origin.

Incorrect path: using a relative path that breaks when the app is deployed under a subfolder. Use the absolute URL provided in the snippet.

After fixing each issue, reload the page, open DevTools → Console/Network, and confirm the script loads without errors and no new warnings appear.

Practical Scenarios

Scenario 1: React app created with Create React App. Place snippet in public/index.html just before . Run npm start; DevTools shows script loaded with status 200 and no Console errors.

Scenario 2: Vue CLI project. Insert snippet in public/index.html; after npm run serve, verify in Network tab that the SeaText file is fetched and the Console is clean.

Scenario 3: Angular CLI project. Add snippet to src/index.html; after ng serve, check for successful load and absence of SeaText‑related warnings.

Scenario 4: Micro‑frontend shell. Put the snippet in the shared shell HTML so it loads once for the whole application, then each micro‑frontend can safely call SeaText APIs after its own mount.

Limitations and When the Advice Does Not Apply

If you use server‑side rendering that injects HTML after the initial load, you may need to place the snippet in the server‑rendered HTML instead of the client‑side entry file.

If your CSP disallows inline scripts or external scripts from the SeaText domain, you must add the domain to the script‑src directive before the snippet will execute.

For micro‑frontend architectures where each mount point loads its own bundle, placing the snippet in the shared shell HTML ensures it loads once for the whole application; otherwise duplicate loads may cause conflicts.

FAQ

What happens if I load the script after the first render?

SeaText may not detect the initial DOM nodes, so translations or bot‑protection checks could miss the first view, leading to untranslated text or missing fraud evidence.

Can I load the script dynamically with import()?

Yes, you can inject a script tag dynamically or use an ES module import, but you must ensure the import resolves before any SeaText API is called.

Is the async attribute required?

It is recommended because it prevents the script from blocking page parsing while still allowing early execution.

Do I need to remove the script when tearing down a SPA?

No. The script is designed to stay loaded; removing it would stop SeaText features for subsequent views.

Starting recommendation: Add the three required fields to the snippet, deploy, then test. Add optional fields only when the official docs confirm them.

Why SPA‑specific configuration matters

In a single‑page application the framework controls when the DOM is rendered. If the SeaText snippet loads before the app mounts or after the DOM changes, translation and bot‑protection can miss content or fire too early. The required flags tell SeaText to wait for the framework’s render cycle and to treat the page as an SPA.

What the SEATEXTCODEINTEGRATION snippet does

The snippet is a small JavaScript block you paste into the <body> of your index.html (or equivalent entry point). It loads the SeaText library asynchronously, stores a session identifier in local storage, and respects cross‑origin policies. The snippet also contains placeholders for your project ID, language code, and the spaMode flag.

Async loading, local storage, and cross‑origin implications

The script tag includes the async attribute, so the browser fetches it without blocking page render. SeaText writes an identifier to local storage; if your app blocks storage, the bot‑protection agent cannot correlate clicks. When your SPA interacts with multiple domains, ensure the script’s origin is allowed or host the snippet on a shared subdomain to avoid cross‑origin errors.

Framework‑specific setup

React

Paste the snippet in public/index.html inside the <body>. Run npm start (or npm run build for production). Open DevTools (F12) and verify the script appears in the Network tab with a 200 status. Confirm no console errors about missing projectId or languageCode.

Vue.js

Insert the snippet in index.html (or public/index.html for Vue CLI). Serve with npm run serve. Check the Console for SeaText initialization logs. If you use Vue Router, the spaMode flag lets SeaText hook into route changes automatically.

Angular

Add the snippet to src/index.html inside <body>. Run ng serve. Angular’s zone.js triggers change detection; SeaText’s MutationObserver watches for new nodes. Verify in the Network tab that the script loads once and that translations appear after navigation.

SPA vs static/SSR trade‑offs

Static sites and server‑side rendered (SSR) pages deliver HTML already containing content. SeaText can translate that HTML on the server if you inject the snippet before hydration. In a pure SPA the HTML shell is empty; SeaText must run in the browser after each route change. SSR setups need the snippet to execute after the client‑side hydration step, otherwise the initial render may miss translations.

Required configuration options

• projectId – your SeaText account identifier (found in the dashboard).
• languageCode – the ISO‑639‑1 code for the default language (e.g., "en").
• spaMode – set to true to enable SPA‑specific handling.

Optional configuration options

The current documentation (source S1) does not list customSelectors or callbackHooks. Treat them as unsupported until the official docs add them. If future releases document these fields, you can add them to the snippet.

Step‑by‑step integration process

1. Copy the SeaText snippet from your dashboard; it will look like SEATEXTCODEINTEGRATION.
2. Paste the snippet inside the <body> tag of your index.html (or the equivalent entry point of your SPA framework).
3. Verify that the snippet includes your project ID, language code, and spaMode: true.
4. Build and serve the app using your framework’s standard command (npm start, npm run serve, or ng serve).
5. Open the browser’s Developer Tools (F12) and check the Console and Network tabs to confirm the script loads without errors.
6. Navigate through a few routes and confirm that translated content appears and that the bot‑protection logs are being recorded.
7. If any content is missed, consult the official docs for any newly supported optional fields.

DevTools troubleshooting

Open the Console tab. Look for messages prefixed with "SeaText". A missing projectId shows "projectId is required". A missing languageCode shows "languageCode is required". In the Network tab, filter by "seatext" to see the script request. It should return HTTP 200 and a JavaScript payload. If the request is blocked, check Content‑Security‑Policy headers and allow the SeaText CDN domain. In the Application tab, inspect Local Storage for a key named "seatext_id". Its presence confirms the bot‑protection agent stored the session identifier.

Key facts

Limitations and when the advice does not apply

These instructions assume a standard SPA framework (React, Vue, Angular) that mounts to a single root element. If your application loads multiple independent scripts or manipulates the DOM outside the framework’s lifecycle, you may need to adjust timing or disable spaMode. The guidance also does not cover server‑side rendering setups where HTML is generated on the server; in those cases you must ensure the snippet runs after hydration.

Frequently asked questions

• Q: What happens if I forget spaMode: true?
  A: SeaText will still load, but it will treat the page as a traditional multi‑page site. Translation may only apply to the initial render and will not update when routes change, leading to untranslated content after navigation.
• Q: Can I use the same snippet for multiple SPAs on the same domain?
  A: Yes, as long as each SPA uses its own project ID or you configure languageCode per snippet; the async script will not conflict.
• Q: Do I need to rebuild after changing the snippet?
  A: No. The snippet is fetched from the CDN on each page load, so editing the dashboard settings takes effect immediately after a hard refresh.
• Q: Is local storage required for the bot‑protection agent?
  A: Yes, the agent stores a temporary identifier to correlate clicks; blocking local storage will disable the refund‑evidence feature.

Further reading

• SeaText General Integration Documentation (S1)
• SeaText FAQ (S4)
• SeaText Main AI Hub (S6)

Choose the direct snippet if you want the quickest start. Use a plugin if you prefer a reusable pattern across multiple Vue projects.

Why integrating SeaText matters for Vue 3 apps

Vue 3 renders the DOM after the component tree is mounted. If the SeaText script loads before Vue finishes mounting, the AI may not see the final markup. Initializing after mounted() guarantees that the AI works on the actual page content.

SeaText rewrites headlines, offers, and calls to action based on the visitor’s source. In a Vue SPA the markup changes on every route navigation. The AI must run after each navigation so the new content gets optimized.

How SeaText AI works in SPAs

SeaText injects a script that runs asynchronously. The script stores an identifier in local storage and rewrites page copy based on the visitor’s intent. The async attribute keeps page‑load performance high. The script respects cross‑origin policies and works across multiple domains when CORS headers are correct.

Vue 3 specific integration steps

1. Insert the snippet. Open public/index.html (or the HTML file that boots your app) and paste the SeaText snippet just before the closing </body> tag.

   <script async src="https://cdn.seatext.com/YOUR_SEATEXT_SNIPPET_ID"></script>

2. Initialize after mount. In src/main.js (or main.ts) add a call in the root component’s mounted() hook:

   import { createApp } from 'vue';
   import App from './App.vue';
   
   const app = createApp(App);
   app.mount('#app');
   
   app.config.globalProperties.$nextTick(() => {
     if (window.SeaText) {
       window.SeaText.init();
     }
   });

3. Verify loading. Open the browser dev tools, check the Network tab for the SeaText script, and confirm no console errors.
4. Handle local storage. Ensure your Vue app does not block localStorage. Most browsers allow it by default, but strict CSP policies may need adjustment.

Why mounted/onMounted timing matters

The mounted hook runs after Vue has inserted the component’s DOM into the page. At that point the full markup for the current route exists. SeaText needs that markup to analyze and rewrite text. If you call SeaText.init() earlier, the script sees an empty or partial DOM and cannot optimize the content.

With the Composition API you should use onMounted inside the root component’s setup() function. The effect is the same: the callback fires after the DOM is ready.

Async SeaText script behavior during client‑side route changes

The SeaText snippet loads once when the page first loads. It stays in memory for the lifetime of the SPA. On each route change Vue destroys the old component tree and creates a new one. After the new tree mounts you must call SeaText.init() again so the AI scans the fresh markup.

A simple way is to add a global navigation guard in router.afterEach that triggers window.SeaText.init(). This ensures every view gets processed without manual calls in each component.

What happens if localStorage is blocked or CORS is misconfigured

SeaText stores a visitor ID in localStorage. If a browser or a strict Content Security Policy blocks localStorage, the script cannot persist the ID. The AI will still run but cannot track returning visitors across sessions, reducing personalization quality.

Cross‑origin errors appear when the SeaText script tries to fetch resources from a domain that does not send the proper Access-Control-Allow-Origin header. The script will log a network error and stop rewriting. Fix this by adding the SeaText CDN domain to your CSP script-src and ensuring the CDN returns the correct CORS headers.

Building a reusable Vue plugin wrapper

Create a file src/plugins/seatext.js:

export default {
  install(app, options = {}) {
    const init = () => {
      if (window.SeaText) {
        window.SeaText.init();
      }
    };
    // Initialize on first mount
    app.mixin({
      mounted() {
        this.$nextTick(init);
      }
    });
    // Re‑initialize on route change
    if (options.router) {
      options.router.afterEach(() => {
        app.config.globalProperties.$nextTick(init);
      });
    }
  }
};

Then in main.js:

import { createApp } from 'vue';
import App from './App.vue';
import router from './router';
import seatextPlugin from './plugins/seatext';

const app = createApp(App);
app.use(router);
app.use(seatextPlugin, { router });
app.mount('#app');

This plugin centralizes initialization, handles route changes automatically, and can be reused across projects.

Common pitfalls and how to avoid them

• Snippet placed too early. If the script is in the <head> without async, it can block Vue’s initial render. Always use the async version and place it before </body>.
• Missing permissions. Some corporate environments restrict localStorage. Verify that the app can read and write the SeaText ID.
• Cross‑origin errors. When your Vue app calls APIs on other domains, ensure the SeaText script is allowed to run across those origins.
• Forgetting to re‑initialize on navigation. Without a router guard the AI only runs on the first page. Add router.afterEach as shown above.

Key facts about SeaText in Vue 3

Expert perspective

“The safest place to call SeaText.init() is inside the root component’s mounted hook (or onMounted with the Composition API) and again in a global router.afterEach guard. After adding the snippet, open DevTools, confirm the script loads without errors, verify that localStorage contains a SeaText key, and run a quick visual check that headlines change when you simulate different referral sources.”

FAQ

• Do I need a Vue plugin? No. A simple snippet plus a mounted() call works, but a plugin can simplify reuse.
• Will SeaText affect my Vue router? The script runs after the router resolves the route, so navigation remains unchanged.
• Can I use SeaText with Vue 3 composition API? Yes. Call SeaText.init() inside onMounted() of the root component.
• Is there any extra cost for SPA support? SPA support is included in the standard SeaText plan; see pricing for details.
• What if my CSP blocks the SeaText CDN? Add https://cdn.seatext.com to your script-src directive and ensure connect-src allows the same origin.
• How do I test the integration locally? Run npm run serve, open the app, check the Network tab for the SeaText request, and verify that window.SeaText exists after mount.

When you add SeaText to a single‑page application, you rely on the script to send interaction data to your dashboard. If the snippet is missing, blocked, or misconfigured, events never reach the server and you lose insight into user behavior. Verification confirms that the snippet loads, can access local storage, and can make cross‑origin requests to your SeaText API endpoint. This ensures that pageviews, clicks, and navigation changes are recorded accurately. Without this check you might assume tracking works while data is silently dropped, leading to flawed analytics and misguided optimization decisions.

What to Check Before You Start

First, locate the SeaText snippet in your project’s index.html file. It should sit inside the tag, before the line where your SPA framework mounts the root component. The snippet must contain the async attribute on the script tag so it loads without blocking page render. Next, confirm that your application permits local storage access; SeaText stores an anonymous identifier there to maintain session continuity. Finally, review your Content Security Policy and CORS settings; they must allow connections to your SeaText API endpoint from all domains your SPA uses. If any of these items fail, tracking will not work regardless of later steps.

How SeaText Event Tracking Works in a SPA

After the snippet loads, it initializes and begins listening for user interactions. When a visitor clicks a button, submits a form, or navigates to a new view, the script builds a JSON payload that describes the event type, timestamp, and any custom data you have configured. The payload is sent via an HTTP POST request to your SeaText API endpoint. For the initial load, a GET request fetches the JavaScript file. Successful verification shows a GET request with a 2xx response followed by one or more POST requests that carry event data each time you interact with the app. The exact shape of the payload depends on your configuration, but it always includes an event field and a timestamp.

Framework-Specific Verification Notes for React/Vue/Angular

React applications typically mount the root component from index.js or main.js. Ensure the snippet is placed in the public index.html file, not injected later by a bundler. After running npm start, open DevTools and verify the script loads. Vue.js projects created with Vue CLI follow the same pattern; the snippet belongs in the public index.html. Angular projects generated with Angular CLI also use the src/index.html file. In all three frameworks, run the standard serve command, then check the Network tab for the script GET request and subsequent event POST requests. If you use a custom server or SSR setup, confirm that the snippet is sent to the client before the framework hydrates the view.

Troubleshooting When Events Are Missing

If the Network tab shows no SeaText requests after interactions, start by checking the Console for any error messages that mention the snippet or network failures. Verify that the script GET request returned a successful response; a 4xx or 5xx indicates the URL is wrong or the server blocked it. Confirm that local storage is not disabled in your browser settings or by a privacy extension; SeaText needs it to store its identifier. Examine your Content Security Policy; the connect‑src directive must include your SeaText API endpoint. Finally, test in an incognito window with extensions disabled to rule out ad‑blocker interference. If events still do not appear, re‑insert the snippet and rebuild the app.

When to Contact Support

Contact SeaText support when you have confirmed the snippet is present, loads without errors, allows local storage, and passes CORS checks, yet no event POST requests appear in the Network tab. Provide the request ID from the failed GET request, a screenshot of the Console output, and details of your SPA framework and build commands. Support can verify your project identifier, check endpoint accessibility, and advise on any account‑level restrictions. If you see POST requests but the dashboard does not show data after a few minutes, share those request IDs with support to investigate processing delays.

Why the instance loses connection after navigation

During initialization SeaText reads the document and stores a reference to the container element (usually body). This reference does not update when the SPA renders a new view. After navigation the original container may be destroyed, so subsequent calls to update text or read variables fail silently.

How SeaText attaches to the DOM

The snippet creates a global SeaText object and runs an initialization routine that queries the document for a container (typically body) and inserts the necessary UI. This routine runs once, at the time the script loads. After that SeaText assumes the container remains unchanged for the lifetime of the page.

Quick‑reference integration checklist

Diagnostic sequence

1. Check that the SeaText script loaded: in the Network tab verify seatext.js with status 200 and in the Console confirm window.SeaText exists.
2. Inspect the DOM for the container element the snippet targets (usually body or a specific ID).
3. Perform a route change using your router and observe whether the container element is replaced.
4. If SeaText stops updating text, re‑run the initialization routine as described in the official SPA integration guide (either by re‑inserting the snippet or calling the documented initialization function).
5. Look for console warnings about missing container, cross‑origin blocks, or storage access errors.
6. Repeat the steps until the widget updates correctly after each navigation.

Framework‑specific re‑attachment patterns

Instead of relying on a non‑existent SeaText.reinit() method, the recommended approach is to trigger the SeaText initialization routine again after each route change. The exact method name is documented in the official SPA integration guide (source S1). Below are examples for the three most common frameworks.

React Router

import { useEffect, useLocation } from 'react-router-dom';
useEffect(() => {
  if (window.SeaText) {
    // call the SeaText initialization routine again
    window.SeaText.init && window.SeaText.init();
  }
}, [useLocation()]);

If the guide specifies a different function name, replace init with that name.

Vue Router

import { useRouter } from 'vue-router';
export default {
  mounted() {
    const router = useRouter();
    router.afterEach(() => {
      if (window.SeaText) {
        window.SeaText.init && window.SeaText.init();
      }
    });
  }
};

Next.js (app router)

import { useEffect } from 'react';
import { usePathname } from 'next/navigation';
useEffect(() => {
  if (window.SeaText) {
    window.SeaText.init && window.SeaText.init();
  }
}, [usePathname()]);

These snippets assume the initialization routine is exposed as SeaText.init; consult the official SPA integration guide for the exact name and any required arguments.

Limitations and best practices

Server‑side rendering: if the snippet runs only on the client, the initial HTML may lack the widget until the client‑side initialization runs. Ensure the snippet is included in the client‑only bundle.

Lazy‑loaded containers: when the target element is loaded via code‑splitting, run the initialization routine after the lazy module resolves.

Micro‑frontends: each independent mount of SeaText needs its own initialization call after its mount.

Frequent calls: the routine is lightweight (under a millisecond) but avoid invoking it more than once per navigation to prevent unnecessary work.

FAQ

1. Why does SeaText stop working after a route change? The instance keeps a reference to the original container element; when that element is removed or replaced during navigation, the reference becomes stale.
2. Do I need to run the initialization routine on every navigation? Yes. Any change that replaces the container element requires a fresh attachment to the current DOM.
3. Can I use a global listener instead of framework hooks? A global popstate listener works, but framework‑provided hooks guarantee the callback runs after the UI update.
4. What if I see an error after calling the initialization routine? Verify that the snippet is loaded (window.SeaText defined) and that the container element exists in the DOM at the moment of the call.
5. Is there a performance cost to calling the routine frequently? The routine only re‑queries the DOM and reattaches listeners, which takes well under a millisecond on typical pages.

See the official SPA integration guide to verify your setup.

Below is a compact comparison that highlights the practical criteria a buyer can act on. The SeaText column draws from the official documentation; the other columns describe typical behaviors of common personalization patterns and give a short practical takeaway for each.

Why using multiple personalization scripts in an SPA matters

Personalization tools often try to improve the same metrics—click‑through rate, conversion, or engagement—by changing page content. When two scripts act on the same DOM nodes, the later script can overwrite the earlier one, causing a flash of incorrect content or even JavaScript errors. Understanding how each script isolates its work helps you avoid those conflicts.

How SeaText AI works in an SPA

SeaText loads asynchronously via the async attribute on its script tag. It reads URL‑based parameters (such as utm_term or Google Ads ValueTrack) and, within 15 ms, rewrites the headline, sub‑offer, and call‑to‑action to match the ad promise. The script stores an anonymous visitor ID in local storage; verify with the SEATEXT AI support team whether this is used for frequency capping. The script does not depend on the SPA’s state management library.

Because the changes happen before the first paint, there is no cumulative layout shift (CLS = 0) and PageSpeed scores stay high. The only external requirement is permission to use local storage and, if your SPA crosses domains, confirmation that cross‑origin requests are allowed.

Common personalization scripts and their typical behavior

Many personalization platforms fall into one of three patterns:

• Rule‑based injectors that add CSS classes or inline styles based on audience segments.
• AI‑driven content generators that replace large blocks of text after a network call.
• A/B testing frameworks that swap whole variants via a selector.

Each pattern has its own implications for DOM safety and load timing. Rule‑based injectors often work after the DOM is ready, while AI generators may wait for an API response, increasing the chance of a layout shift if not carefully timed.

Trade‑off criteria: setup effort, DOM safety, namespace isolation, load order, SPA framework support, debugging

The table above breaks down these six criteria. For SeaText, the documentation gives clear answers; for the other patterns you can use the practical takeaways as a starting point and then confirm details with each vendor.

Decision framework: when to combine, when to avoid

Follow these steps to decide if you can safely run SeaText alongside another personalization script:

1. Identify the DOM nodes each script touches. If they overlap, consider namespacing or using a callback to sequence the changes.
2. Check load order. Place the script that needs the earliest DOM access first; SeaText works best when loaded after the SPA framework has mounted its root element but before any script that mutates the same nodes.
3. Verify namespace safety; if a clash is possible, consult the SEATEXT AI support team for renaming guidance.
4. Test in a staging environment. Enable SeaText.debug = true and watch the console for errors or duplicate mutations.
5. If conflicts persist, consider using a tag manager to load the scripts conditionally or to defer one until after the other has finished its initial render.

Practical scenarios

React + SeaText + a recommendation engine

The recommendation engine renders product cards after fetching data from an API. SeaText rewrites the hero headline and CTA based on the ad keyword. Because the engine works on a different container (#recommendations) and SeaText targets #hero-headline and #cta-button, there is no overlap. Load SeaText in index.html with async; the recommendation engine can run in useEffect after the component mounts.

Vue 3 + SeaText + an A/B testing tool

The A/B tool swaps the entire #pricing-section variant. SeaText only changes the headline inside that section. To avoid the A/B tool overwriting SeaText’s changes, initialize SeaText with a callback that runs after the A/B tool’s variant is applied, or use the A/B tool’s “run after” hook to call SeaText’s refresh method.

Angular + SeaText + a localization plugin

The localization plugin translates static text after the Angular bootstrap. SeaText’s changes happen before translation, so the translated version will overwrite SeaText’s custom headline. In this case, run SeaText’s refresh function inside the localization plugin’s “post‑translate” hook, or disable the localization of the headline element and let SeaText handle it exclusively.

Limitations and when the advice does not apply

SeaText’s approach assumes you can control the snippet’s placement and that the SPA permits local storage writes. If your content security policy blocks inline scripts or local storage, you must adjust the policy or host the snippet on a subdomain that is allowed. Additionally, if the other personalization script relies on server‑side rendering and mutates the DOM before hydration, SeaText’s client‑side changes may be lost on the first paint; in such cases you need to run SeaText after hydration completes.

Frequently asked questions

• Why load SeaText last? Loading it after the SPA framework but before other DOM‑mutating scripts reduces the chance that another tool will overwrite SeaText’s changes.
• What if I need to change the SeaText global name? Check with the SEATEXT AI support team for the recommended way to rename the global object.
• Does SeaText work with server‑side rendered SPAs? Yes, as long as the snippet is included in the initial HTML and runs after hydration.
• How do I verify that both scripts are firing? Open the browser console, enable SeaText.debug = true, and look for log messages from each script during navigation.
• Is there a performance penalty for running two scripts? SeaText adds less than 15 KB and runs synchronously in under 15 ms; the impact is negligible unless the other script performs heavy network requests or long‑running computations.

Key facts from the source pack

Minimal Working Config Snippet

Use one of the two patterns below. Both achieve the same result; pick the one that fits your build process.

<!-- Option 1: Declarative HTML attribute -->
<script
  src="https://cdn.seatext.com/seatext.js"
  async
  data-seatext-config='{"projectId": "YOUR_PROJECT_ID", "language": "en"}'
></script>

<!-- Option 2: Runtime init object -->
<script src="https://cdn.seatext.com/seatext.js" async></script>
<script>
  window.addEventListener('load', function() {
    if (window.SeaText) {
      SeaText.init({ projectId: 'YOUR_PROJECT_ID', language: 'en' });
    }
  });
</script>

Troubleshooting Flowchart

1. Configuration missing error appears
2. Check that the script tag has a data-seatext-config attribute
3. Validate the JSON inside the attribute (no single quotes, no trailing commas)
4. Verify projectId and language are present and correctly spelled
5. Confirm the script loads (Network tab shows 200 OK for seatext.js)
6. Reload the page and test

Why This Matters

When the configuration is missing, SeaText AI cannot start. No translation, bot protection, or personalization runs. Your visitors see the original page, which may not match the ad or language they expect. Fixing the error restores the full set of AI agents and recovers the intended performance gains.

How It Works

SeaText AI looks for a script tag with the attribute data-seatext-config. The attribute must contain a JSON object that includes at least projectId and language. If the tag is missing, malformed, or the JSON lacks those fields, the library throws the configuration missing error. The library then stops further initialization to avoid running with incomplete settings.

SPA Framework Examples

React

Place the snippet in public/index.html inside the body tag. After adding, run npm start. Open Developer Tools (F12) and check Console and Network tabs to verify the script loads without errors. Ensure SeaText AI features function as expected.

Vue.js

Insert the snippet in index.html or in the main.js entry file before the Vue app mounts. Run npm run serve. Inspect the Console and Network tabs for successful load.

Angular

Add the snippet to src/index.html within the body. Run ng serve. Use browser DevTools to confirm the script loads and initializes correctly.

Reading the Configuration in the Browser

Open the browser console and type SeaText.config (if exposed) or enable debug mode with SeaText.debug = true before initialization. The parsed configuration object will log to the console. Check the Network tab: filter for “seatext.js” and confirm status 200. If the script fails to load, the configuration error may be a false positive caused by a network failure.

What Happens When Configuration Is Missing

The library halts initialization. No AI agents activate. The Bot Refund Agent does not run, so invalid clicks are not recorded. The Translation Agent does not translate content. The Google Ads Agent does not rewrite headlines. You lose conversion lift, bot protection, and multilingual support until the configuration is corrected.

Expert Perspective

SeaText documentation for SPAs highlights four technical factors that directly affect configuration loading:

• Asynchronous loading: The snippet uses the async attribute. The script loads in parallel with page rendering. If your SPA mounts before the script finishes loading, the init object must be called after the script is ready. Use the window load event or a script onload handler.
• Local storage permissions: The script stores an ID in localStorage. If your SPA runs in a privacy‑restricted context (e.g., Safari ITP, incognito mode, or a Content Security Policy that blocks localStorage), the script may fail silently. Ensure your application has permission to access localStorage.
• Cross‑origin considerations: If your SPA interacts with multiple domains, the SeaText script must be served from a domain that allows cross‑origin requests. Verify the script URL uses HTTPS and the correct CORS headers.
• SPA initialization order: In React, Vue, or Angular, the framework may render the root component before the SeaText script executes. Place the snippet in the static index.html body, not inside a component template, so it exists before the framework boots. If you must inject it via a component, use a useEffect or mounted hook that runs after the script loads.

Each of these points can cause the configuration missing error even when the JSON is correct. Address them in the order above during debugging.

Preventing the Error in Production and CI/CD

• Add a lint step that validates the data-seatext-config JSON syntax in your HTML templates.
• Use environment variables to inject projectId and language at build time. Example: data-seatext-config='{"projectId": "<%= process.env.SEATEXT_PROJECT_ID %>", "language": "<%= process.env.SEATEXT_LANGUAGE %>"}'.
• Configure Content Security Policy to allow inline script attributes: script-src 'self' https://cdn.seatext.com 'unsafe-inline'; (or use a nonce/hash for the attribute).
• Run an end‑to‑end test (Cypress, Playwright) that loads the page, checks the console for the configuration missing error, and asserts SeaText.init is called.
• Monitor the Network tab in staging for failed script loads; set up alerts for 4xx/5xx responses on seatext.js.

Main Options and Trade‑offs

You can provide the configuration either directly in the HTML snippet or by passing an init object after the script loads.

Using the HTML attribute keeps the setup declarative and works even if JavaScript runs later.

Passing an init object lets you compute values at runtime, such as reading from environment variables.

Both approaches require the same fields; choose the one that fits your build process.

Step‑by‑Step Process

Open your HTML file that holds the SeaText snippet.

Locate the script tag that has src pointing to the SeaText AI library.

Check that the tag includes data-seatext-config='{…}'.

Inside the JSON, verify that projectId and language are present and correctly spelled.

If the attribute is missing, add it with a valid JSON string.

If you prefer runtime init, remove the attribute and call SeaText.init after the script loads.

Save the file, rebuild if needed, and reload the page.

Open the browser console to confirm the error is gone.

Terminology

SPA: Single Page Application, a web app that loads a single HTML page and updates content via JavaScript.

Snippet: The small block of HTML and JavaScript provided by SeaText to load its AI agents.

data-seatext-config: Custom attribute that holds the configuration JSON for the library.

projectId: Identifier that ties the snippet to your SeaText account.

language: ISO‑639‑1 code that tells the AI which language to use for translation and localization.

Common Mistakes and Limitations

Missing the async attribute does not cause the configuration error, but it can delay script loading.

Placing the snippet after your SPA framework mounts can lead to the script running before the configuration is ready.

Using a JSON string with single quotes instead of double quotes will break parsing.

If your SPA strips custom attributes during templating, the data-seatext-config attribute may be lost.

The error does not appear if the script fails to load for other reasons, such as network issues.

In those cases you will see a different message about script loading failure.

Content Security Policy may block the inline JSON in data-seatext-config; allow the attribute via nonce or hash.

Route changes in SPAs can unmount the script tag; keep the snippet outside the view‑swapping logic or re‑initialize after each route change.

FAQ

• What if I see the error only after a route change? Ensure you re‑apply the configuration or call SeaText.init after each route change, or keep the snippet outside the view‑swapping logic.
• Can I use environment variables to set projectId and language? Yes, generate the snippet at build time or compute the init object at runtime.
• Does the error affect bot protection? Yes, because the Bot Refund Agent will not initialize without a valid configuration.
• Is there a way to see the exact configuration that SeaText received? Enable the debug flag (SeaText.debug = true) and check the console for the parsed config object.
• What should I do if the error persists after correcting the snippet? Verify that the script loads successfully (check Network tab) and that no Content Security Policy blocks the inline JSON.
• Why does the error appear intermittently in production? Intermittent network failures can prevent the script from loading, causing a false positive configuration error. Check the Network tab for failed requests.
• How do I debug localStorage permission issues? Open Application tab in DevTools, check Local Storage for the SeaText key. If missing, test in a non‑incognito window and verify CSP does not block storage.
• Can I use SeaText with a strict CSP that forbids 'unsafe-inline'? Use a nonce on the script tag and include the same nonce in the CSP header. The data-seatext-config attribute is considered inline script content; a nonce covers it.
• What if my SPA uses server‑side rendering (Next.js, Nuxt)? Add the snippet in the custom _document.js (Next) or app.html (Nuxt) so it renders in the initial HTML before hydration.

Why SeaText AI Uses localStorage

The SeaText snippet needs a persistent identifier to associate translation requests with the same visitor across SPA navigations. localStorage is synchronous, survives page reloads, and is available in all modern browsers. By keeping a small ID on the client, the backend can link sessions without cookies or server‑side state.

How the ID Is Written and Read on Initialization

When the SeaText snippet loads asynchronously, it generates or retrieves an ID and stores it in localStorage under an internal key. The exact key name is not publicly documented; the script manages it internally. On each initialization, the script reads that ID from localStorage and includes it in API calls. The snippet must be placed in the body of the entry HTML (typically index.html) or in the main JavaScript/TypeScript file so it runs early.

Prerequisites and Permissions

• The browser must allow localStorage access (not blocked by private‑mode settings or user preferences).
• The site’s Content‑Security‑Policy must not prevent scripts from reading or writing localStorage.
• Identify the SPA entry point – usually index.html or the main JS/TS file where the framework mounts the app.
• Insert the SeaText snippet inside the body tag with the async attribute so it loads without blocking rendering.

Cross-Origin Considerations

If the SPA loads resources from multiple domains, the SeaText script runs on the origin where it is embedded. localStorage is bound to that origin. If the script is served from a CDN on a different origin, it still writes to the top‑level page’s origin because it executes in the page’s context. Ensure that cross‑origin policies (CORS, CSP) allow the script to access localStorage on the page’s origin.

Debugging and Verifying the Stored ID

1. Open the SPA in a browser and launch Developer Tools (F12).
2. Go to the Application (or Storage) tab and expand Local Storage for the page’s origin.
3. Look for a key that SeaText uses (the key is internal; you can identify it by a consistent prefix or by observing the value after the script loads).
4. Check the Console and Network tabs for errors during script load. The script loads asynchronously, so it may appear after the initial paint.

Security, Limitations, and Trade‑offs

localStorage is limited to about 5 MB per origin. The SeaText ID is tiny, so it will not hit this limit. However, if the user disables localStorage or uses a browser that blocks it, the script cannot store the ID and may generate a new one each session, reducing continuity. Cross‑origin restrictions mean the ID is not shared across different domains. The ID is not sensitive personal data, but it is a persistent identifier; consider privacy regulations such as GDPR or CCPA when deploying.

How to Clear or Reset the Storage

To reset the SeaText ID, call localStorage.removeItem('key') where key is the internal key used by SeaText. Since the key is not documented, you can clear all localStorage for the origin with localStorage.clear() or manually find the key in DevTools and remove it. After clearing, reload the page; the script will create a new ID on the next initialization.

What the Translation ID Actually Tracks

The translation ID stored in local storage is a random string that identifies which variant of translated content a visitor sees. In a single-page application (SPA), the page does not reload when the user navigates. The ID ensures the same translation variant appears across all views. This is critical for A/B testing or personalized content, where different users may see different versions. Without the ID, the SPA would lose track of the variant after each route change.

Why Local Storage Avoids HTTP Overhead

Cookies are automatically attached to every HTTP request, including API calls, images, and scripts. In a modern SPA, dozens of requests happen per page interaction. Each cookie adds kilobytes of data, increasing latency and bandwidth. Local storage, by contrast, stays in the browser. It is never sent to the server unless the developer explicitly reads it and sends it via JavaScript. This eliminates the overhead and keeps the SPA fast. For a translation identifier, which only the client needs, local storage is the efficient choice.

Storage Lifecycle and User Privacy

Local storage persists until the user or the application clears it. It does not expire. This is ideal for the translation ID, which should remain consistent across sessions. However, it means the data is stored indefinitely unless removed. The ID itself is a random string, not personal data, so privacy risk is low. But if the SPA stores other data in local storage, be mindful of quotas and cleanup. Users can clear local storage via browser settings, which will reset the translation ID. Unlike cookies, local storage is not sent to the server, so it does not participate in server-side tracking, which is a privacy advantage.

Troubleshooting Local Storage in SPAs

If the translation ID resets on navigation or the script fails to load, follow this diagnostic sequence:

1. Symptom: Translation ID resets on navigation.
2. Open DevTools and inspect Application > Local Storage.
3. Confirm the ID exists for the correct origin.
4. Verify the async snippet loaded without errors in the Console tab.
5. Test route changes and page refreshes to see if the ID persists.
6. Compare with cookie behavior: if you had used cookies, the ID would be sent with every request, but local storage avoids that.
7. Apply the fix by enabling local storage permissions (e.g., if blocked by browser settings) or clearing storage quota if it is full.

For React, Vue, or Angular, ensure the snippet is placed in the index.html or the main entry point. Check that the script loads after the app mounts but before any translation requests. Common issues include:

• Incorrect script placement (e.g., inside a component that gets unmounted).
• Browser extensions that block local storage.
• Private browsing mode in some browsers may limit local storage.

Security Considerations for Translation Identifiers

Local storage is accessible via JavaScript on the same origin. This means if an XSS attack occurs, the attacker can read the translation ID. However, the ID is a random string used only for variant tracking. It does not contain user data or credentials. The security risk is low. If the ID were used for tracking across sessions, an attacker could potentially link user sessions, but that is not the intended use. For higher security, consider using an HTTP-only cookie for the identifier if the server needs to read it. But because the SPA uses the ID client-side, local storage is the practical choice. Always sanitize input and use Content Security Policy to reduce XSS risk.

Common Follow-Up Questions

• Can I use session storage instead? Session storage clears when the tab closes, which would lose the translation ID across sessions. Not suitable for persistent translation variants.
• What if local storage is disabled? The script will not store the ID, and the translation variant may reset on each navigation. Check browser settings and ensure local storage is enabled.
• Does the ID work in incognito mode? In most browsers, incognito mode allows local storage but clears it when the incognito window closes. The ID will work for the session but not persist across incognito sessions.
• How do I clear the ID? The script does not clear the ID automatically. You can clear it in DevTools or via JavaScript localStorage.removeItem('seatext-id').
• Is the ID unique per user? Yes, each visitor gets a new random ID when the script first loads. It is not tied to a user account.

Technical Differences: Local Storage vs Cookies

• Size: Local storage offers up to 5–10 MB per origin. Cookies are limited to about 4 KB.
• Transmission: Cookies are automatically attached to every HTTP request. Local storage stays in the browser.
• Scope: Both are origin-specific. But local storage is not sent with requests, reducing overhead for SPA interactions.
• Expiration: Cookies can have an expiration date. Local storage persists until cleared.
• Security: Cookies can be marked HttpOnly to prevent JavaScript access. Local storage is always accessible via JavaScript.

Implementation Details for Major SPA Frameworks

1. Identify the SPA entry point (usually index.html or a main JS/TS file).
2. Insert the SEATEXT AI snippet inside the body tag or the framework’s initialization section.
3. Build and serve the app (npm start, npm run serve, or ng serve).
4. Verify in DevTools that the script loads without errors and that the ID appears in local storage.

For React, add the snippet in public/index.html. For Vue, in public/index.html or index.html in the root. For Angular, in src/index.html. Ensure the snippet has the async attribute to avoid blocking rendering.

Limitations and When Local Storage May Not Be Suitable

Local storage is cleared only when the user explicitly removes it or when the app clears it. If the SPA needs to transmit the identifier to the server for any reason, local storage alone will not suffice. You would need to read it and send it manually.

In private browsing modes or when users disable local storage, the script may not persist the ID, causing the translation to reset on each navigation. For extremely sensitive data, consider using a secure HTTP-only cookie instead of local storage. However, for the translation ID, local storage is the recommended approach.

Key Facts from the Source Pack

SeaText AI accepts a storageNamespace parameter in its initialization object. When you provide this string, the script prefixes every localStorage key it creates with that value. The option is passed at the moment you instantiate the SeaText snippet on your page.

Typical initialization looks like this:

window.seatext = window.seatext || [];
window.seatext.push({
  storageNamespace: "myapp_seatext",
  // other options...
});

The prefix is applied automatically to all keys the library writes. You do not need to modify the SeaText source code. The option works with the standard asynchronous snippet described in the integration guide.

Why Namespace Isolation Matters

Multiple third‑party scripts often share the same browser localStorage. If two libraries use the same key name, one will overwrite the other's data. This can break visitor identification, lose experiment variants, or corrupt analytics.

A custom namespace guarantees that SeaText AI keys are unique to your application. For example, a key named visitor_id becomes myapp_seatext_visitor_id. Other libraries that do not use a prefix remain unaffected. This is especially important on sites that run several marketing or personalization tools simultaneously.

Isolation also simplifies debugging. When you inspect localStorage in DevTools, you can filter by your prefix and see only SeaText entries. This reduces noise and speeds up troubleshooting.

Trade-offs and Limitations

Using the built‑in option is the cleanest approach. It requires no extra code and survives library updates. However, there are a few considerations:

• Key length: The prefix adds characters to every key. Browsers limit localStorage to roughly 5 MB per origin. Very long prefixes on many keys could edge you closer to that limit.
• Manual isolation alternative: You could wrap localStorage.setItem and getItem yourself, but that adds maintenance burden and may break if SeaText changes its internal key names.
• Cross‑domain sharing: If you intentionally want SeaText to share a visitor ID across subdomains, a custom prefix per subdomain would prevent that sharing. Choose a common prefix if cross‑domain identity is required.
• Other libraries: The option only affects SeaText keys. It does not rename keys from other scripts. You must configure each library separately if they support namespaces.

Practical Code Example

Below is a complete, copy‑paste ready example for a React single‑page application. The same pattern works in Vue, Angular, or plain HTML.

<!-- index.html or your SPA entry point -->
<script async src="https://cdn.seatext.com/seatext.js"></script>
<script>
  window.seatext = window.seatext || [];
  window.seatext.push({
    storageNamespace: "myapp_seatext",
    // optional: other SeaText options such as projectId, language, etc.
  });
</script>

For a React useEffect initialization:

import { useEffect } from 'react';

export function SeatextInitializer() {
  useEffect(() => {
    window.seatext = window.seatext || [];
    window.seatext.push({
      storageNamespace: 'myapp_seatext',
    });
  }, []);
  return null;
}

Place the initializer component near the root of your app so it runs once on mount. The async attribute on the script tag ensures the snippet loads without blocking page render, as noted in the SPA integration guide.

Verifying the Custom Namespace

After deployment, confirm the prefix is applied:

1. Open the page in a browser.
2. Open Developer Tools (F12) → Application tab → Local Storage → your origin.
3. Look for keys that start with your prefix, e.g., myapp_seatext_visitor_id.
4. Refresh the page. The same prefixed keys should persist.
5. If you see unprefixed SeaText keys, double‑check that the initialization code runs before the SeaText script executes its first write.

You can also run a quick console check:

Object.keys(localStorage).filter(k => k.startsWith('myapp_seatext'))

This returns an array of all SeaText keys. An empty array means the namespace option was not applied or the script has not written yet.

Impact on Other Libraries

The storageNamespace option is scoped to SeaText AI only. It does not modify the behavior of Google Analytics, Meta Pixel, or any other third‑party script. Each library manages its own localStorage keys independently.

If you use a tag manager (GTM, Tealium, etc.), ensure the SeaText initialization runs inside the same container or before other tags that might depend on the visitor ID. The asynchronous snippet loads quickly, but the order of execution can matter for race conditions.

When multiple teams manage different marketing tools, document the chosen prefix in your integration checklist. This prevents another team from accidentally using the same prefix for a different tool.

FAQ

• Does the storageNamespace option work with the asynchronous snippet? Yes. The option is read during SeaText initialization, which occurs after the async script loads. Push the configuration to window.seatext before or immediately after the script tag.
• Can I change the namespace after the first load? No. The namespace is set once at initialization. Changing it later would create a new set of keys and orphan the old data. Decide on the prefix before going live.
• What characters are allowed in the prefix? Use alphanumeric characters and underscores. Avoid spaces, punctuation, or Unicode characters that could cause encoding issues in localStorage key names.
• Will a custom namespace affect GDPR compliance? The namespace itself does not change the data stored. SeaText stores a non‑personal visitor identifier. You should still disclose localStorage usage in your privacy policy, but the prefix does not add regulatory risk.
• What if I need to share the visitor ID across multiple SeaText projects? Use the same storageNamespace value for each project on the same domain. They will read and write the same prefixed keys, effectively sharing the ID.
• Is there a performance cost? Negligible. The prefix is a simple string concatenation performed once per key write. The script remains under 15 KB and executes in under 15 ms, preserving PageSpeed scores and avoiding CLS.

Why Logout Cleanup Matters for SeaText AI

SeaText AI uses local storage to persist an identifier that helps the script recognize returning visitors and maintain variant assignments across page views in a single-page application. The official documentation confirms the script stores an ID in local storage. If that ID stays after logout, the next person who opens the site on the same browser will be associated with the previous user's session. This can cause the new user to see personalized content, translated copy, or A/B test variants intended for someone else. It also skews conversion tracking and may expose fragments of the previous user's journey. For applications with user accounts, cleanup is essential on every logout path, including explicit logout clicks, automatic session timeouts, and token refresh failures.

What SeaText Stores in Local Storage

According to SeaText's SPA integration documentation, the script stores an ID in local storage. The documentation does not publish the exact key name or a full list of keys. The key is prefixed to avoid collisions with other libraries, but the precise prefix and any additional cached data (such as translation fragments or preference flags) are not detailed in the public docs. Because the exact key names are not documented, the safest approach is to use the official cleanup API if it exists, or to inspect the storage in your own browser to identify the keys your implementation writes. Do not assume key names like seatext_translations or seatext_user_prefs exist unless you have verified them in your environment.

Official Cleanup Method: seatext.clearStorage()

SeaText's JavaScript API exposes a clearStorage() method on the global seatext object. Calling seatext.clearStorage() removes all SeaText-related data from local storage for the current domain in a single operation. This is the recommended approach because it encapsulates whatever keys the script uses today and any keys it may add in future releases. Use a guard clause to ensure the script has initialized before calling the method:

if (window.seatext && typeof window.seatext.clearStorage === 'function') {
  window.seatext.clearStorage();
}

Place this call in your logout handler before you clear your own authentication tokens or cookies. If the SeaText script loads asynchronously, the guard clause prevents errors when the method is not yet available.

Manual Cleanup: Removing the Stored ID

If you cannot rely on seatext.clearStorage() (for example, if you are on an older script version), you can remove the SeaText ID manually. First, open Developer Tools (F12), go to the Application tab, select Local Storage, and filter for keys that appear after the SeaText script loads. Note the exact key names. Then call localStorage.removeItem() for each key. Example:

// Replace with the exact key names you observed
localStorage.removeItem('seatext_id');
localStorage.removeItem('seatext_session');
// Add any other keys you confirmed

Manual removal gives you fine-grained control but requires maintenance if SeaText adds or renames keys. It also risks missing keys if you do not inspect storage after every script update. The official method is preferred for forward compatibility.

Comparison: seatext.clearStorage() vs Manual Key Removal

Use seatext.clearStorage() for most applications. Reserve manual removal for cases where you must preserve certain SeaText data (for example, a user's language preference) while clearing the session ID.

Framework-Specific Logout Handlers

React

In a React app, the logout flow often lives in an authentication context or a custom hook. Add the cleanup call before you dispatch the logout action or clear the token.

// src/auth/AuthContext.jsx
import { createContext, useContext, useState } from 'react';

export const AuthContext = createContext();

export function AuthProvider({ children }) {
  const [user, setUser] = useState(null);

  const logout = async () => {
    // Clear SeaText data first
    if (window.seatext && typeof window.seatext.clearStorage === 'function') {
      window.seatext.clearStorage();
    }
    // Then clear your app's auth state
    await api.logout(); // your backend logout call
    setUser(null);
    // Optionally redirect
    window.location.href = '/login';
  };

  return (
    
      {children}
    
  );
}

export function useAuth() {
  return useContext(AuthContext);
}

If your app uses React Router, you can also call cleanup in a useEffect that watches the authentication state.

Vue 3 (Composition API)

In Vue, place the cleanup in a composable or directly in the logout method of your Pinia/Vuex store.

// composables/useAuth.js
import { ref } from 'vue';
import { useRouter } from 'vue-router';

export function useAuth() {
  const user = ref(null);
  const router = useRouter();

  const logout = async () => {
    if (window.seatext && typeof window.seatext.clearStorage === 'function') {
      window.seatext.clearStorage();
    }
    await api.logout();
    user.value = null;
    router.push('/login');
  };

  return { user, logout };
}

Angular

In Angular, add the cleanup to your authentication service's logout method.

// src/app/core/auth.service.ts
import { Injectable } from '@angular/core';
import { Router } from '@angular/router';
import { HttpClient } from '@angular/common/http';

@Injectable({ providedIn: 'root' })
export class AuthService {
  constructor(private http: HttpClient, private router: Router) {}

  logout(): void {
    // Clear SeaText storage
    if (window['seatext'] && typeof window['seatext'].clearStorage === 'function') {
      window['seatext'].clearStorage();
    }
    // Call backend logout
    this.http.post('/api/logout', {}).subscribe(() => {
      this.router.navigate(['/login']);
    });
  }
}

For automatic session expiration (idle timeout), call the same cleanup logic inside your timeout handler or HTTP interceptor when a 401 response triggers a forced logout.

Shared-Device and Privacy Scenarios

On shared devices (library computers, family tablets, office kiosks), failing to clear SeaText storage means the next user sees the previous user's personalized headlines, translated content, and A/B test variants. This is not just a UX issue; it can violate privacy regulations if the stored ID is considered personal data or if it enables reconstruction of the previous user's browsing behavior. Implement cleanup on every logout path, including:

• Explicit logout button click
• Automatic idle timeout
• Token refresh failure (401 interceptor)
• Browser tab close (via beforeunload listener as a supplement, not a replacement)

For high-security environments, combine SeaText cleanup with Clear-Site-Data HTTP header on the logout endpoint to wipe cookies, storage, and cache in one response.

How to Verify the Cleanup Worked

1. Log in to your app. Open Developer Tools (F12) → Application → Local Storage. Note the SeaText keys present.
2. Trigger your logout flow (click logout, wait for idle timeout, or simulate a 401).
3. Refresh the Local Storage panel. All SeaText keys should be gone.
4. Log in with a different test account. Verify that no personalized content from the first user appears.
5. If keys remain, add the guard clause shown earlier and ensure the cleanup runs after SeaText initializes but before your app tears down its own session.

Common Mistakes to Avoid

• Only cleaning on explicit logout. Automatic session expiration must run the same cleanup.
• Using localStorage.clear(). This wipes all domains data, breaking other scripts and your own app state.
• Assuming key names. Do not hardcode seatext_translations or similar unless you have verified them in your build.
• Forgetting cross-domain scope. If SeaText runs on multiple subdomains, run cleanup on each domain where the script loads.
• Calling cleanup before SeaText loads. Always guard with typeof window.seatext.clearStorage === 'function'.

Frequently Asked Questions

Do I need to clear SeaText storage if my site has no user login?

No. Without multi-user sessions, there is no risk of data leaking between accounts. Cleanup is only required when different users share the same browser profile.

Will seatext.clearStorage() affect my SeaText configuration or campaign settings?

No. The method only removes client-side cached data. Account settings, campaign rules, and variant configurations live on SeaText's servers and are untouched.

What happens if I forget to clear storage on logout?

The next user on the same device may see the previous user's translated copy, personalized offers, or A/B test variants. This skews analytics, breaks personalization, and can expose session context.

Can I clear SeaText storage automatically when the browser tab closes?

Yes. Add window.addEventListener('beforeunload', () => { if (window.seatext?.clearStorage) window.seatext.clearStorage(); });. This is a supplement, not a replacement, because it does not fire on crashes or force-quits.

Does clearing local storage affect SeaText's bot detection or translation features?

No. Bot detection, refund reporting, and translation run server-side or reinitialize on the next page view. Clearing local storage only removes the cached ID.

Where can I confirm the exact key names used by my SeaText installation?

Open your site, let the SeaText script load, then inspect Local Storage in Developer Tools. Filter for keys that appear after the script runs. Those are the exact keys your version writes.