Disable collapse of admin meta boxes

I have been attempting to disable the ability to collapse admin meta boxes. By the looks of it WordPress creates this functionality in postbox.js /wp-admin/js/ but I have been unable to find a hook or suitable JavaScript to overwrite the built in functions.

This is a some test code I am working with:

jQuery('.postbox h3, .postbox .handlediv, .hndle').bind('click', function(e) {

    return false;


Any thoughts on how this could be achieved?

Solutions Collecting From Web of "Disable collapse of admin meta boxes"

Add this to your functions file and it will kill the metabox toggles:

function kill_postbox(){
    global $wp_scripts;
    $footer_scripts = $wp_scripts->in_footer;
    foreach($footer_scripts as $key => $script){
        if('postbox' === $script)
add_action('admin_footer', 'kill_postbox', 1);

For current WordPress version (4.5.3) I come up with the following solution which removes closing metaboxes handler and opens all previously closed metaboxes.

php (plugin.php)

function add_admin_scripts( $hook ) {    
  wp_register_script( 'disable_metabox_toggling', plugin_dir_url(__FILE__) . 'index.js', 'jquery', '1.0.0', true);
  wp_enqueue_script( 'disable_metabox_toggling' );
add_action( 'admin_enqueue_scripts', 'add_admin_scripts', 10, 1 );

js (index.js)

  $(document).ready(function() {
     $('.postbox .hndle').unbind('click.postboxes');
     $('.postbox .handlediv').remove();

If you want to use it inside theme you should replace plugin_dir_url(__FILE__) with get_template_directory_uri()