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How to import api-fetch for a POST request?

  • Hi!

    I’m trying to use the new REST API integration of ACF to make a POST request, but I can’t get it to work because I always get errors when importing api-fetch.

    What I did:
    – ran npm init on my WordPress installation
    – then ran npm install @wordpress/api-fetch --save

    Then, here’s what I put in functions.php of my theme:

    function my_acf_admin_head() { ?>
        <script type="module">
            import apiFetch from '../../../node_modules/@wordpress/api-fetch'';
            // POST
            apiFetch( {
            path: '/wp/v2/book/{ID}',
            method: 'POST',
            data: {
                "acf": {
                    "author": "Abraham (Abe) Simpson",
            } ).then( ( res ) => {
                console.log( res );
            } );
    <?php }
    add_action('acf/input/admin_head', 'my_acf_admin_head');

    Here’s the error I get:
    Loading module from “” was blocked because of a disallowed MIME type (“text/html”).

    I tried a few other things but they all end up making errors as well. I’m familiar with NPM, but I’ve never used it with WordPress before. However I can’t find much online about this problem, the only thing people seem to say is to use type="module", but I’m still getting problems with it.

    Any help would be appreciated, thank you 🙂

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