Get handle for enqueued scripts

add_filter( 'script_loader_tag', 'cameronjonesweb_add_script_handle', 10, 3 );
function cameronjonesweb_add_script_handle( $tag, $handle, $src ) {

    return str_replace( '<script', sprintf(
        '<script data-handle="%1$s"',
        esc_attr( $handle )
    ), $tag );

}