How to Verify the SeaText AI Script Loads Correctly on Your Website
Open your browser's Developer Tools (F12), check the Console and Network tabs for successful SeaText script load messages, confirm the SeaText object exists in window, and verify no network errors appear for the script...
Verifying that the SeaText AI script loads without errors is the first step to ensuring AI translations, personalization, and conversion optimization work as expected. The verification process uses standard browser developer tools and takes less than a minute once you know where to look.
Prerequisites Before You Start
You need access to the website where the SeaText snippet has been added. The snippet must already be placed in your HTML—typically inside the body tag of index.html or the equivalent initialization file for your SPA framework. If you haven't added the snippet yet, follow the installation guide for your framework first.
Have a modern browser ready (Chrome, Firefox, Edge, or Safari). No special extensions or command-line tools are required.
Step-by-Step Verification Using Browser Developer Tools
- Open your site in the browser where the SeaText snippet is deployed.
- Launch Developer Tools by pressing F12 (Windows/Linux) or Cmd+Option+I (macOS).
- Select the Console tab. Look for a message indicating the SeaText script loaded successfully. The exact wording may vary by version, but you should see no red error lines referencing the SeaText script URL.
- Switch to the Network tab. Reload the page (Ctrl+R or Cmd+R) to capture the full request waterfall.
- Filter for "seatext" or "script" in the network filter box. Locate the SeaText script request—it typically loads from a SeaText CDN domain.
- Confirm the request status is 200 OK. The Type column should show "script" and the Initiator column will reference your HTML or the async script tag.
- Check the Console again after reload for any runtime errors that appear after the script executes.
If all requests return 200 and the Console shows no SeaText-related errors, the script has loaded correctly.
Verify the SeaText Object Exists in Window
After the script loads, SeaText exposes a global object on window. In the Console tab, type:
typeof window.SeaTextIt should return "object" (or the specific namespace SeaText uses). If it returns "undefined", the script either failed to load or hasn't executed yet. Wait a moment and retry—SeaText loads asynchronously via the async attribute on the script tag, so there can be a brief delay before the object is available.
You can also inspect the object's properties to confirm initialization:
console.log(window.SeaText)This prints the full object, letting you verify configuration values and agent status.
Check Network Request Details for the Script Resource
Click the SeaText script row in the Network tab to open the detail pane. Verify:
- Response Headers:
Content-Type: application/javascript(ortext/javascript). - Cache headers: The script may be cached; a 304 Not Modified on subsequent loads is normal.
- Timing: The script should download in tens to low hundreds of milliseconds on a typical connection.
- Initiator: Should show your HTML file or the script tag that injects SeaText.
If the request shows a 404, 403, 5xx, or a CORS error, the script URL is wrong, blocked, or the CDN is unreachable. Copy the request URL and open it in a new tab to see the raw response.
Common Issues and How to Fix Them
Script Blocked by Content Security Policy (CSP)
If your site uses a strict CSP, the SeaText script domain must be whitelisted in script-src. The Console will show a CSP violation error with the blocked URL. Add the SeaText CDN domain to your CSP header or meta tag.
Local Storage Access Denied
SeaText stores an ID in localStorage. If your site runs in a sandboxed iframe or a privacy mode that blocks storage, the script may throw a SecurityError or DOMException. Ensure the page context allows localStorage access.
Cross-Origin Issues in Multi-Domain SPAs
If your SPA interacts with multiple domains, the SeaText script must load on each domain where you want it active. Verify the snippet is present on every domain's entry point and that no cross-origin restrictions block the script or its API calls.
Async Load Timing in SPAs
Because the snippet uses async, the script may load after your framework's initial render. In React, Vue, or Angular, this is normal. If you need to interact with SeaText immediately after mount, listen for the script's load event or poll window.SeaText until defined.
SPA Framework-Specific Verification
React
After adding the snippet to public/index.html (or your framework's entry HTML), run npm start. Open DevTools and follow the verification steps above. SeaText's documentation explicitly recommends checking Console and Network tabs after npm start.
Vue.js
Place the snippet in index.html or your main entry file. Run npm run serve and verify using the same DevTools workflow.
Angular
Add the snippet to src/index.html. Run ng serve and inspect Console and Network tabs.
In all three frameworks, the verification steps are identical because the script loads at the browser level, not inside the framework's module system.
Verification Checklist
| Check | Pass Criteria | Where to Look |
|---|---|---|
| Script request status | 200 OK (or 304 cached) | Network tab |
| Console errors | No red errors referencing SeaText | Console tab |
| Global object | typeof window.SeaText === "object" | Console evaluation |
| Content-Type header | application/javascript | Network → Headers |
| Local storage write | No SecurityError in Console | Console tab |
| Functionality spot-check | Translations, personalization, or agents activate | Page interaction |
Key Facts
| Fact | Detail |
|---|---|
| Script loading method | Async script tag (async attribute) |
| Global namespace | window.SeaText (verify in Console) |
| Local storage usage | Stores an ID; requires localStorage permission |
| Supported SPA frameworks | React, Vue.js, Angular (and any SPA via index.html) |
| Verification tools | Browser DevTools (F12) — Console and Network tabs |
| Typical load time | Tens to low hundreds of milliseconds |
Limitations and When This Advice Does Not Apply
- This verification covers client-side script loading only. Server-side rendering (SSR) setups that inject SeaText via a backend template still need the same browser-side checks.
- If your site uses a strict CSP, iframe sandboxing, or a privacy proxy that strips scripts, the script may load but fail to initialize. The Console will surface those errors.
- Enterprise or self-hosted SeaText deployments may use a different script URL or namespace. Adjust the filter and object check accordingly.
- This guide does not cover API key validation, agent configuration, or translation quality—those are separate steps after the script loads.
FAQ
What does a successful SeaText load look like in the Console?
You should see no red error messages referencing the SeaText script URL. A successful load is mostly silent; the confirmation is the presence of window.SeaText and a 200 network response.
Why does window.SeaText return undefined immediately after page load?
The script loads asynchronously (async attribute). Wait a few hundred milliseconds and re-check, or listen for the script's onload event if you need to run code the moment it's ready.
Can I verify the script load programmatically in an automated test?
Yes. In Cypress, Playwright, or Puppeteer, wait for window.SeaText to be defined and assert the network request returns 200. The same selectors used in manual DevTools work in headless mode.
What if the script loads but translations don't appear?
Script load is necessary but not sufficient. Check that agents are activated in your SeaText dashboard, the AI scope is configured, and the page content matches the selectors SeaText expects. That configuration step is separate from script loading.
Does SeaText work if localStorage is blocked?
The script stores an ID in localStorage. If storage is blocked (private browsing, sandboxed iframe, CSP storage directive), the script may error or degrade. Allow localStorage for the SeaText domain.
How do I know which SeaText script URL to expect?
The snippet you paste into your HTML contains the exact script URL. Copy that URL from your snippet and search for it in the Network tab to confirm it's the one being requested.
Can multiple SeaText snippets on the same page cause conflicts?
Only include the snippet once per page. Duplicate snippets can cause double initialization, duplicate network requests, and unpredictable behavior. Verify in the Network tab that the script is requested exactly once per page load.
Further reading and comparison sources
These external sources provide additional context for evaluating the topic. Their inclusion is not an endorsement.
How SeaText can help
SeaText's integration snippet is designed to load asynchronously so it never blocks your page render. Once the script loads, the window.SeaText object gives you programmatic access to agents, translation status, and variant data—useful for custom workflows or automated tests. If you hit CSP, localStorage, or cross-origin issues, the SeaText dashboard shows the exact script URL and required permissions so you can whitelist them quickly. For SPAs, the same snippet works across React, Vue, and Angular because it attaches at the browser level, not inside your framework bundle.