Add filter for wp_theme_get_element_class_name

[benjgrolleau]

Hello,

I think it would be a good idea to add a filter to the wp_theme_get_element_class_name or WP_Theme_JSON::get_element_class_name function return. This would allow to add classes programmatically to the elements.

It could be something like that :

<?php
public static function get_element_class_name( $element ) {
        $class_name = '';

        if ( array_key_exists( $element, static::__EXPERIMENTAL_ELEMENT_CLASS_NAMES ) ) {
                $class_name = static::__EXPERIMENTAL_ELEMENT_CLASS_NAMES[ $element ];
        }

        return apply_filters( "element_{$element}class_name", $class_name );

        // Or another option, without dynamic part.
        return apply_filters( "element_class_name", $class_name, $element );


}

Have a nice day.

[benjgrolleau]

I've made a mistake, there's a missing underscore the filter could be :

<?php
return apply_filters( "element_{$element}_class_name", $class_name );

[benjgrolleau]

I've add a patch using the following solution, that seems more evolutive.

<?php
return apply_filters( "element_class_name", $class_name, $element );