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    0.3.2 • Public • Published

    Gutenberg Fields Middleware

    Register fields for Gutenberg blocks with a simple, declarative API.

    This project is in its early stages. Please open an issue with questions, feedback, suggestions, and bug reports.

    Using | Available Fields


    $ npm i gutenberg-fields-middleware

    To include Middleware in your JS file add import statement at the top of the file

    import 'gutenberg-fields-middleware';


    Gutenberg fields middleware requires only two files dist/middleware.min.js and dist/middleware.min.css as dependency.

    There are two ways of using fields middleware.

    There are two ways of using the middleware.

    1. As a WordPress Plugin: Install the Gutenberg Fields Middleware as a standalone WordPress plugin which will register a gutenberg-fields-middleware handle you can add as a dependency for your block script.
    2. Using JS and CSS files: Or you can use middleware.min.js and middleware.min.css and enqueue them as dependency for your block script. Be sure to use array( 'wp-editor', 'wp-blocks', 'wp-i18n', 'wp-element', 'wp-date', 'underscore' ) handles as your dependency when enqueing middleware js file.

    Fields are now registered as attribute configuration details. Here's how you might register image, text, color and range fields:

    wp.blocks.registerBlockType( 'example-namespace/example-block', {
        title: 'Example Block',
        category: 'common',
        attributes: {
            image: {
                type: 'object',
                field: {
                    type: 'image',
            text: {
                type: 'string',
                field: {
                    type: 'text',
                    placeholder: 'Enter text..',
            color: {
                type: 'string',
                field: {
                    type: 'color',
                    placement: 'inspector',
            range: {
                type: 'string',
                field: {
                    type: 'range',
                    label: 'Columns',
                    placement: 'inspector', // To show in sidebar.
                default: 20,
        edit: function( props, middleware ) {
            return [
                middleware.inspectorControls, // Contains ALL inspector controls.
        save: function( props ) {}

    Which will create a block like this


    ✔️ Fields can also be used in the same way when using register_block_type in PHP.

    register_block_type( 'example-namespace/example-block', array(
        'attributes' => array(
            'image' => array(
                'type' => 'object',
                'field' => array(
                    'type' => 'image',
                    'buttonText' => 'Upload',
                    'imagePlaceholder' => true,
                    'removeButtonText' => 'Remove',
            'color' => array(
                'type' => 'string',
                'field' => array(
                    'type' => 'color'
        'render_callback' => 'example_callback',
    ) );

    Returning field in edit method:

    • middleware.fields.arrtibuteKeyName for a single field when placement property is not defined.
    • middleware.blockControls for all block-control fields. ( where placement is block-control )
    • middleware.inspectorControls for all inspector fields. ( where placement is inspector )

    Getting more control over fields:

    There are two ways of getting a field, one is simply use middleware.fields.arrtibuteKeyName or middleware.getField( props, 'arrtibuteKeyName', config ) when you need more control over a field, here you can use all configuration options in config parameter given in the fields doc.

    The same can be done for block controls and inspector controls as middleware.getBlockControls( props, fields ) and middleware.getInspectorControls( props, fields ) where fields can be defined as an array of fields.

    See example usage of alignment-toolbar.

    Example Usage:

    • See examples
      • You can set GUTENBERG_FIELDS_MIDDLEWARE_IS_DEV to true during development in wp-config.php which will also enable example blocks.
    • Check gutenberg-supplements plugin where we have created some actual blocks using middleware.


    Read docs on github




    npm i gutenberg-fields-middleware

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