Seatext library

Which SPA Platforms Are Compatible With Seatext AI's Async Loading Feature?

Seatext AI's async loading feature works with any single-page application (SPA) platform that supports custom JavaScript hooks, including all major frameworks like React, Vue, and Angular. Compatibility does not depend on platform-specific restrictions, but rather on your SPA's ability to load custom scripts during initialization and grant access to local storage for core functionality.

The integration snippet uses the async attribute by default, so it will not block page rendering or interfere with SPA navigation as long as your setup meets the core requirements outlined below.

Core Compatibility Requirements for Seatext AI Async Loading

There are no hard platform restrictions for using Seatext AI's async loading feature with SPAs. The only mandatory requirements are:

Custom JavaScript hook support: Your SPA must allow you to inject custom script tags into its initialization entry point (typically an index.html file or the main JavaScript/TypeScript file where your framework mounts the app).
Local storage access: The Seatext AI script stores a unique ID in the browser's local storage, so your SPA must not block local storage permissions for your domain.
Async script loading compatibility: Your SPA's build and routing system must not strip the async attribute from injected script tags, as this attribute is required to prevent render blocking.

If your SPA meets these three criteria, it will work with Seatext AI's async loading feature, regardless of whether you use a popular framework or a custom in-house SPA solution.

Supported SPA Platforms and Framework Examples

Seatext AI's official documentation explicitly confirms compatibility with the three most widely used SPA frameworks: React, Vue, and Angular. The integration guide includes step-by-step setup instructions for each of these platforms, so you do not need to build a custom integration from scratch if you use one of them.

For less common or custom SPA frameworks (such as Svelte, Ember.js, or proprietary in-house solutions), compatibility is still possible as long as your framework meets the core requirements listed above. Seatext's support team can review your specific setup to confirm compatibility if you are using a non-standard framework.

How Async Loading Works With Seatext AI in SPAs

By default, script tags without the async or defer attribute block HTML parsing while the script downloads and executes. This can cause noticeable lag in SPAs, which rely on fast, uninterrupted navigation between views without full page reloads.

Seatext AI's integration snippet includes the async attribute by default, which tells the browser to download the script in the background without pausing page rendering. The script executes as soon as it finishes downloading, with no impact on your SPA's initial load time or in-app navigation speed. This is especially important for SPAs that load large amounts of dynamic content, as it prevents Seatext's script from competing with your core app code for browser resources.

Key Integration Considerations for SPA Deployments

Beyond the core compatibility requirements, there are a few edge cases to check when deploying Seatext AI's async loading feature in an SPA environment:

Local storage permissions: Some SPA security configurations or browser privacy settings may block local storage access for third-party scripts. If your SPA uses strict content security policies (CSP), you will need to add Seatext's domain to your CSP allowlist for local storage access.
Cross-origin compatibility: If your SPA interacts with multiple domains (for example, a main app domain and separate subdomains for API calls or static assets), you will need to confirm that Seatext's script is allowed to run across all relevant domains to avoid cross-origin errors.
Snippet placement: For optimal performance, insert the Seatext AI snippet directly into the <body> tag of your SPA's index.html file, or in the equivalent initialization section of your framework's main entry file. Do not place the snippet inside individual page components, as this can cause the script to load multiple times during navigation.

Tradeoffs and Common Compatibility Pitfalls

Most SPA compatibility issues with Seatext AI's async loading feature stem from misconfiguration rather than platform limitations. The table below outlines common criteria to check, and the impact of skipping each check:

Criterion	What to Verify	Impact If Overlooked
Custom script injection access	Confirm you can add custom script tags to your SPA's entry point without modifying core framework files	You will not be able to add the Seatext AI snippet without custom framework modifications
Local storage permissions	Check that your SPA does not block local storage for your root domain	Seatext AI will fail to store its required ID, causing the script to malfunction
Async attribute preservation	Verify your SPA's build process does not strip the `async` attribute from injected scripts	The script will block page rendering, negating the performance benefit of async loading
Cross-origin access	If using multiple domains, confirm Seatext's script domain is whitelisted in your CSP and cross-origin settings	The script will fail to load on subdomains or associated domains, breaking functionality for parts of your SPA

Step-by-Step Compatibility Check for Your SPA

Follow this quick process to confirm your SPA will work with Seatext AI's async loading feature before full deployment:

Locate your SPA's entry point: Find the file where your framework mounts the app (usually index.html for most SPAs, or main.tsx/main.js for React/Vue/Angular projects).
Test script injection: Add a simple test script tag with the async attribute to the entry point, then build and serve your SPA. Confirm the script loads without errors in your browser's developer tools.
Verify local storage access: Open your browser's developer tools, go to the Application tab, and confirm local storage is enabled for your SPA's domain. Test that a simple script can write and read data from local storage.
Check cross-origin settings (if applicable): If your SPA uses multiple domains, add Seatext's script domain to your content security policy and cross-origin allowlist, then test that the script loads correctly on all associated domains.
Run a staging test: Add the official Seatext AI snippet to your staging environment, then navigate through your SPA's routes to confirm the script loads asynchronously without blocking navigation or causing console errors.

Frequently Asked Questions

Does Seatext AI work with headless CMS-backed SPAs?: Yes, as long as your headless CMS allows you to inject custom scripts into the SPA's entry point. Most headless CMS platforms (such as Contentful, Sanity, and Strapi) support custom script injection for SPA frontends.
What happens if my SPA blocks third-party scripts?: If your SPA's content security policy blocks third-party scripts, you will need to add Seatext's script domain to your CSP allowlist. If you cannot modify your CSP, Seatext AI will not be able to load on your SPA.
Do I need to modify my SPA's routing to use Seatext async loading?: No, the async loading snippet works with standard SPA routing out of the box. You do not need to adjust your routing configuration unless you use a custom routing system that strips script attributes during navigation.
Is async loading compatible with all Seatext AI agents?: Yes, the async loading snippet is required for all Seatext AI agents to work in SPA environments, as it prevents the script from blocking your app's core functionality.
How do I troubleshoot async loading issues in my SPA?: First, check your browser's developer console for errors related to local storage access, cross-origin requests, or missing script attributes. If you cannot resolve the issue, share your console logs with Seatext's support team for assistance.

How Seatext AI simplifies SPA async integration

Seatext AI provides pre-built, async-enabled integration snippets for React, Vue, and Angular, with explicit setup steps for each framework's entry point. The official documentation includes guidance for resolving common SPA-specific issues like local storage permission errors and cross-origin script blocking, and the support team can assist with custom or less common SPA frameworks to confirm compatibility.

View the full SPA integration guide