Override post-formats in child theme

Question

I'm using a child theme that only has video post format, but parent theme defines all post formats:

add_theme_support( 'post-formats', array( 'gallery', 'link', 'image', 'quote', 'video', 'audio', 'chat' ) );

I tried:

remove_theme_support( 'post-formats' ); add_theme_support( 'post-formats', array( 'video' ) );

But is not working. How can I do this without modifying parent theme?

Answer 1

It's import to set the priority for your after_setup_theme higher than your parent theme. The default priority is 10. Using the twentysixteen as example, use priority 11 on child themes' 'after_setup_theme' action. Exemple below:

function twentysixteen_child_setup() {
    add_theme_support( 'post-formats', array(
        'video',
    ) );
}
add_action( 'after_setup_theme', 'twentysixteen_child_setup', 11 );

Answer 2

Make sure that you're not just calling these functions within functions.php, but calling them at the right time with add_action(). Try the following:

// in your Child Theme's functions.php    

// Use the after_setup_theme hook with a priority of 11 to load after the
// parent theme, which will fire on the default priority of 10
add_action( 'after_setup_theme', 'remove_post_formats', 11 ); 

function remove_post_formats() {

    remove_theme_support( 'post-formats' );
    add_theme_support( 'post-formats', array( 'video' ) );
}

What's likely happening is that you're attempting to remove theme support before it's even added.