Setup Axios for the WordPress Rest Api https://since1979.dev/snippet-014-setup-axios-for-the-wordpress-rest-api/

axios-wp-rest-api.js

/*
 * Import remote dependencies.
 */
import Axios from 'axios';

/*
 * Create a Api object with Axios and
 * configure it for the WordPRess Rest Api.
 *
 * The 'mynamespace' object is injected into the page
 * using the WordPress wp_localize_script function.
 */
const Api = Axios.create({
    baseURL: mynamespace.rootapiurl,
    headers: {
        'content-type': 'application/json',
        'X-WP-Nonce': mynamespace.nonce
    }
});

export default Api;