@wordpress/api-fetch

API Fetch

Utility to make WordPress REST API requests. It's a wrapper around window.fetch.

Installation

Install the module

npm install @wordpress/api-fetch --save

This package assumes that your code will run in an ES2015+ environment. If you're using an environment that has limited or no support for ES2015+ such as lower versions of IE then using core-js or @babel/polyfill will add support for these methods. Learn more about it in Babel docs.

Usage

import apiFetch from '@wordpress/api-fetch';

apiFetch( { path: '/wp/v2/posts' } ).then( posts => {
	console.log( posts );
} );

Options

apiFetch supports and passes through all options of the fetch global.

Additionally, the following options are available:

path (string)

Shorthand to be used in place of url, appended to the REST API root URL for the current site.

url (string)

Absolute URL to the endpoint from which to fetch.

parse (boolean, default true)

Unlike fetch, the Promise return value of apiFetch will resolve to the parsed JSON result. Disable this behavior by passing parse as false.

data (object)

Shorthand to be used in place of body, accepts an object value to be stringified to JSON.

Middlewares

the api-fetch package supports middlewares. Middlewares are functions you can use to wrap the apiFetch calls to perform any pre/post process to the API requests.

Example

import apiFetch from '@wordpress/api-fetch';

apiFetch.use( ( options, next ) => {
	const start = Date.now();
	const result = next( options );
	result.then( () => {
		console.log( 'The request took ' + Date.now() - start );
	} );
	return result;
} );

Built-in middlewares

The api-fetch package provides built-in middlewares you can use to provide a nonce and a custom rootURL.

Nonce middleware

import apiFetch from '@wordpress/api-fetch';

const nonce = "nonce value";
apiFetch.use( apiFetch.createNonceMiddleware( nonce ) );

Root URL middleware

import apiFetch from '@wordpress/api-fetch';

const rootURL = "http://my-wordpress-site/wp-json/";
apiFetch.use( apiFetch.createRootURLMiddleware( rootURL ) );