Seatext library

How to Add the Seatext AI Snippet to Your React App (Step-by-Step Guide)

You can add Seatext AI to your React app by placing the provided <script> snippet inside the body tag of your index.html file (or equivalent SPA initialization file), then building your app and checking...

What is the Seatext AI snippet and how does it work in React?

The Seatext AI snippet is a JavaScript tag you embed in your frontend to activate Seatext's AI agents (like the Google Ads optimizer, bot refund bot, or translation agent) that can rewrite your landing page copy or chat with visitors in real time. In a React SPA, the snippet doesn't require a React-specific SDK; instead, you place it once at the app's initialization point, and it takes over the DOM operations itself.

What you need before you start

A React project (create-react-app, Next, or your own SPA build) with an index.html in the public folder or root.
The Seatext AI snippet itself. You can get it from your Seatext dashboard or from the official documentation page for SPAs.
Local storage access enabled (the snippet needs to set an ID, and modern browsers allow this by default, but some strict privacy policies or privacy extensions may block it).
Basic command-line tools to build and serve your app (npm start, npm run build).

Where to place the snippet in React

In most React apps, the snippet goes in your index.html file inside the <body> tag. For a typical create-react-app project, this is the public/index.html file. For custom setups where you mount the app through JavaScript, you can also place it in your main JavaScript entry (like index.js or main.ts), but you must ensure it’s inside the same DOM node that initializes your app. The Seatext documentation explicitly says: "Insert the SEATEXT AI snippet within the body tag of your index.html file, or in the equivalent initialization section of your SPA framework."

Step-by-step integration for React

Get your snippet. Copy the SEATEXT AI snippet from your Seatext dashboard or the documentation page. Do not edit it yet—it contains your account identifier.
Open your index.html. Go to public/index.html (create-react-app) or your framework’s main HTML file.
Paste the snippet. Add it just before the closing </body> tag. If you’re using a JavaScript entry point, wrap it inside a DOMContentLoaded listener or place it at the top of your entry function after the DOM is ready. The official docs simply say to put it in the body tag of index.html.
Save and build. Run npm start or npm run build followed by your dev server command (e.g., npm run serve) to see changes.
Check the console. Open DevTools (F12) on your React app. In the Console and Network tabs, look for any failures related to seatext, ai, or localStorage. If you see errors, your local environment may not have permission to store the ID—verify that local storage is enabled and your app isn’t using an iframe that blocks it.

Verifying the snippet loads correctly

After adding the snippet, run the app in a browser. Open Developer Tools and inspect the Network tab. A successful load shows a request from a Seatext domain (look for seatext.com or similar). In the Console, it should show no JavaScript errors. The documentation’s suggested steps say to "open your browser's Developer Tools and check the Console and Network tabs to verify that the SEATEXT AI script loads without errors."

SPA-specific things to know

Asynchronous loading. Seatext automatically loads asynchronously to keep page speed intact, but if your app has other scripts that use synchronous execution, you should keep the snippet inside the body, not the head—that’s where the docs place it.

Local storage permissions. The snippet stores a user id in local storage. If your React app runs inside an iframe or has strict Content Security Policy (CSP) that blocks storage, you’ll need to allow domain access for Seatext. The documentation warns: "Ensure that your application has the necessary permissions to access and use local storage."

Cross-origin. If your React app loads content from multiple domains (like external API or iframe), be sure those domains follow the correct CORS policies. The Seatext script may try to access certain browser APIs, and any cross-origin mismatch could break it.

Common mistakes when linking Seatext to React

Putting the snippet in <head>. Some React templates have a <head> with many preloads. The Seatext docs specifically show the snippet inside the <body>. Always use body.
Forgetting to clear the build cache. If your index.html is cached, you may not see the new snippet. Do a hard refresh (Ctrl+F5) and restart npm.
Writing the snippet after the app mounts. If you put the code in a useEffect hook, you’re probably breaking the flow because the script may run before the app is fully initialized. The dedicated snippet must be part of the initial HTML.
Ignoring local storage blockers. If visitors see an error “Cannot access local storage” in the console, that means the browser’s security policy is blocking it—but your own browser might be fine. Use a test environment with fresh private window.

React, Vue, and Angular share the same integration pattern

While this article is for React, the Seatext docs say the snippet works with any SPA, including Vue and Angular. The test steps are identical: inspect the page and console. So if you re moving between team projects, the exact same snippet works—just adjust where your framework mounts the DOM.

What to do after adding the snippet

After the snippet loads, you can activate the AI agents from Seatext dashboard. These tools rewrite landing pages for ad keywords, chat with buyers, generate variants, or translate your site. There is no programming needed after the snippet—you only log in and click to activate the agents (source: Seatext homepage). For instance, you can activate a CRO optimizer or a Google Ads landing page agent. But first, make sure your snippet loads correctly in React.

Frequently asked questions

Can I put the snippet in my React component?

No. Any component that mounts later (e.g., in a useEffect) will run after the HTML has rendered, likely missing the timing that Seatext expects. The official instruction is to place it in the body of index.html or main init file.

Is there a need to reconfigure any React routes?

No. Seatext works on the whole SPA, not a single route. You don’t need to change routing or add next/own wrappers—the snippet is site-wide.

Will the asynchronously loaded script slow down my React app?

Because the script has the async attribute (per Seatext’s doc, it “loads asynchronously, which helps maintain page load performance”), it’s usually fine. But if you have very strict performance budgets, check the Network tab to see its load time.

I use a React app with a Content Security Policy that blocks external scripts. What do I do?

Add a script-src entry that allows the Seatext domain (like seatext.com) and permit local storage use. The docs note that local storage must be permitted, and if cross-origin issues occur, you need to work around them.

Does this work with React Server-Side Rendering?

Seatext expects a classic SPA. For Next.js or Gatsby, placing the snippet in the root HTML file still works, but you must ensure the script is outside the React tree (i.e., in the layout’s footer).

Key facts

Attribute	Detail
Script attribute	async (never blocks render)
Where to place	Inside <body> of index.html or the SPA’s init file
Storage requirement	Uses local storage to store an ID – you must allow storage access
Cross-origin	Requires no CORS issues if app uses multiple micro-frontends
Frameworks	React, Vue, Angular (documented)
Verification	Server, then browser Developer Tools (Console & Network)

How Seatext can help after you install the snippet

After you’ve added the snippet to your React app, you can use the Seatext dashboard to activate AI agents that improve conversion. For example, the Google Ads Landing Page Agent rewrites your landing page copy in real time for each ad keyword, and the Bot Refund Agent detects fraudulent clicks and creates refund evidence. These agents require a working snippet, which is why the installation step—and ensuring your app lets Seatext reads and write to local storage—is important.

A key limitation: the snippet on its own does not activate any agent. You still must go to seatext.com and turn on the agents you need. The homepage describes this as “Add Seatext to your site in under 1 minute,” but the actual step of activating features is handled in your dashboard, not in the snippet.

Open Seatext and activate AI agents