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Choose the right React and WordPress approach
These options solve different problems. A custom editor block does not turn a WordPress site into a React frontend, and a headless frontend is not required just to make a WordPress-rendered block interactive.
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| Approach | Best suited to | Who renders the interface? | Main consideration |
|---|---|---|---|
| React blocks or editor features | Custom editing controls, blocks, or WordPress management interfaces | WordPress renders the editor UI; the public site continues to use its WordPress rendering setup | Follow WordPress block registration conventions, including server-side registration with block.json. |
| Separate React frontend | Replacing or independently building the public-facing site while keeping WordPress for content administration | The separate React application | You take responsibility for frontend rendering, routing, deployment, and content freshness. |
| WordPress Interactivity API | Adding interactive behavior to blocks that remain WordPress-rendered | WordPress provides the markup; the API adds client-side behavior | It is an option for interactive WordPress blocks, not a replacement for every React frontend. |
The WordPress Block Editor is itself a React single-page application, and a block’s editor interface is a React component provided through its edit property. For server-rendered blocks that need interaction, WordPress’s Interactivity API may fit better than mounting a separate React interface.
Use WordPress as a headless CMS with React
In a headless setup, WordPress remains the content management system and administrative interface. A separately deployed React app requests content from WordPress over HTTP and renders the public pages. The WordPress REST API is the usual starting point: it exposes resources such as posts, pages, and media as JSON.
Discover the site’s API and content
Each WordPress site has its own API root. Use the site’s API index or an OPTIONS request to discover available API information, then check the relevant endpoint for the resource and fields your app needs. Common routes include /wp/v2/posts, /wp/v2/pages, and /wp/v2/media; they are routes relative to the site’s API root, not complete URLs by themselves.
Fetch public posts in React
For a public post list, provide the discovered API root to the component and request the posts route. This example includes a loading state, an error state, and cleanup if the component unmounts while the request is in progress:
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import { useEffect, useState } from 'react';
function Posts({ apiRoot }) {
const [posts, setPosts] = useState([]);
const [loading, setLoading] = useState(true);
const [error, setError] = useState('');
useEffect(() => {
const controller = new AbortController();
async function loadPosts() {
try {
setLoading(true);
setError('');
const response = await fetch(`${apiRoot}wp/v2/posts`, {
signal: controller.signal,
});
if (!response.ok) {
throw new Error(`WordPress returned HTTP ${response.status}`);
}
setPosts(await response.json());
} catch (err) {
if (err.name !== 'AbortError') {
setError(err.message || 'Could not load posts.');
}
} finally {
if (!controller.signal.aborted) setLoading(false);
}
}
loadPosts();
return () => controller.abort();
}, [apiRoot]);
if (loading) return <p>Loading posts…</p>;
if (error) return <p role="alert">{error}</p>;
if (posts.length === 0) return <p>No posts found.</p>;
return (
<ul>
{posts.map((post) => (
<li key={post.id}>{post.title?.rendered}</li>
))}
</ul>
);
}Set apiRoot to the actual API root discovered for your WordPress site, including a trailing slash for this string concatenation. This example is for publicly readable posts; it is not an authentication pattern for private content or write operations.
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A production listing needs an explicit pagination strategy so readers can reach more content than the first returned page. Add suitable request parameters and a user interface for loading another page or navigating between pages. Also decide what to show when the request fails, when the result is empty, and while a request is pending. The example above handles those states but deliberately fetches only one response.
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Protect private content and credentials
Public WordPress data is generally readable without authentication. Private content, password-protected content, internal users, and management actions are subject to authentication and permissions; do not assume that a public posts endpoint makes other data public.
- Keep privileged credentials out of browser-side React code. Anything shipped to a browser can be inspected by visitors.
- Decide how private or preview content will be requested before implementing those screens. Use an authentication design appropriate to the WordPress configuration and the frontend’s server or browser boundary.
- If the frontend and WordPress are on different origins, review cross-origin behavior and authentication configuration. Requirements depend on the WordPress setup and the way the React app sends requests.
Build React blocks and editor features
Use this path when React should extend WordPress rather than replace the public frontend. WordPress’s editor packages, including @wordpress/components and @wordpress/block-editor, provide controls and APIs for editor-facing components.
- Define the block’s metadata in
block.json. - Register the block on the server as well as on the client; WordPress recommends the metadata-based registration approach.
- Implement the editing interface as the block’s React
editcomponent, using WordPress editor packages where appropriate. - Decide separately how the block’s public output should be rendered. Adding a React editor interface does not replace the site’s frontend rendering architecture.
For a custom WordPress management interface rather than a content block, WordPress also documents building a React application that manages pages through the Gutenberg data layer. That approach uses WordPress data packages; it is distinct from making a separate public-facing site.
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If a block should keep its WordPress-rendered markup but gain interactive behavior, evaluate the Interactivity API before building a separate React rendering layer. WordPress describes the API as a way to enhance server-rendered markup with directives and reactive state. Its documentation says it is available for WordPress 6.5 and above.
The WordPress Developer Resources Interactivity API FAQ explains the trade-off this way: “Using React on the frontend doesn’t work smoothly with server rendering in PHP.” The concern is that a separate client-rendered React interface can duplicate rendering logic and may not preserve server-side modifications made through WordPress hooks. This is guidance about that integration pattern, not a blanket objection to React on every WordPress frontend.
Production decisions for a separate frontend
Choose when and where pages render
A React frontend may render content in the browser, generate pages ahead of time, or render them when requests arrive, depending on the framework and hosting setup. These choices affect when WordPress is contacted and how quickly an edit appears to visitors. Choose a rendering approach that fits both the site’s freshness requirements and its deployment environment.
Keep content fresh
A separately deployed frontend may cache API responses or generated pages. Plan how WordPress content changes will trigger or wait for cache revalidation; otherwise, a successful edit in WordPress may not immediately appear on the public site. The exact mechanism depends on the framework and host.
Own the complete public-site experience
With a separate frontend, WordPress supplies content, but the React application is responsible for turning it into a usable site. That includes page rendering, routes, assets, and the way users move through the content. Confirm the API exposes the fields the frontend needs instead of assuming the editor’s presentation and the API response are identical.
A practical decision sequence
- Identify the interface you want to change. Choose editor blocks for the WordPress editing experience, a separate frontend for an independently built public site, or the Interactivity API for behavior on WordPress-rendered blocks.
- Map the content and permissions. Identify the API resources and fields required, and distinguish public data from private, preview, or management operations.
- Choose rendering and deployment responsibilities. For a separate frontend, decide where rendering happens and how routing, assets, cross-origin requests, and content revalidation will work.
- Implement the smallest useful slice. Fetch one public resource or build one editor block, then add the error, loading, empty, and pagination behavior relevant to the feature.
Use WordPress’s REST API and block-editor documentation for the first two paths, and its Interactivity API handbook for server-rendered interactive blocks. The right choice is the one that matches the part of WordPress you intend React to change.
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