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README.md

Creating a new Carbon Field

Step-by-step guide on how to create a new Carbon Field.

Introduction

The Carbon Fields library has many built-in fields, but you may find it necessary to define a new type of field for your specific project needs.

The following tutorial will explain how to create a custom Carbon Field.

Step 1: Download the template

To make it as easy as possible, we have prepared a Carbon Field template that contains a frame for the PHP Carbon Field class and a webpack build process.

You can download the template from here: https://github.com/htmlburger/carbon-field-template

Template Structure

  • /src - field files folder
  • /languages - folder for .po, .mo and .pot files
  • /core - folder for all of your .php files
  • /field.php - bootstrapping php code

Step 2: Name your field

Replace the YOURFIELDNAME and yourfieldname (case sensitive) placeholders in all files. Also rename the files that contain the placeholders.

NB! If your field name contains multiple words, for example Image Gallery, your class names should look like this:

  • PHP class: Image_Gallery_Field
  • Field Component Registration: image_gallery (refer to registerFieldType@/src/index.js)

Step 3: Build assets

  1. Execute composer dump-autoload to create the required autoload.php which needs to be included in your theme.
  2. Execute yarn install in the root directory to install all build process requirements.
  3. Execute yarn build to build the final minimized bundle
Optional

Execute yarn start to continuously build bundle during development. Note that you should add define( 'SCRIPT_DEBUG', true ); to your wp-config.php file in order to load the files generated by the dev build process.

Step 4: Customize

Here is a quick overview of some of the methods you can customize:

PHP

to_json()

You can use this method to modify the field properties that are passed to the React component which represents the field.

field_type_activated

Used for initialization processes that are called once per field type (e.g. setup localization files).

admin_enqueue_scripts()

Used to enqueue CSS/JavaScript files.

admin_init()

Called for each field instance when the field is initialized. (back-end)

init()

Called for each field instance when the field is initialized. (back-end, front-end)

About

Step-by-step guide on how to create a new Carbon Field. Includes a template structure to start with.

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