Prevent a base themes css file from loading
You can use wp_deregister_style in your child theme. Like this. function remove_unwanted_css() { wp_dequeue_style( ‘bootstrap’ ); wp_deregister_style( ‘bootstrap’ ); wp_dequeue_style( ‘bootstrap-custom’ ); wp_deregister_style( ‘bootstrap-custom’ ); } add_action( ‘wp_enqueue_scripts’, ‘remove_unwanted_css’, 20 ); Similarly you can deregister other unwanted css too. Just add wp_deregister_style in this function.