Stop loading jQuery Migrate

jQuery Migrate helps very old jQuery code run. Most sites don’t need it on the public pages; the admin keeps it.

Type PHP
Runs Everywhere (runs as WordPress loads)
Category Performance
Tested with WordPress 7.1

PHP

<?php

add_action(
	'wp_default_scripts',
	static function ( $scripts ) {
		if ( is_admin() || empty( $scripts->registered['jquery'] ) ) {
			return;
		}
		$jquery       = $scripts->registered['jquery'];
		$jquery->deps = array_values( array_diff( $jquery->deps, array( 'jquery-migrate' ) ) );
	}
);

Good to know

After switching it on, check your pages and the browser console. If a slider or menu stops working, switch it off again.

In these packs

Clean up the head: Remove the links, scripts and styles WordPress adds to every page that most sites never use.
Performance: Small changes that save the server and the browser some work.

Install it in one click

It's already in the Snipfire plugin's library. Enter your site's address and it opens there, ready to install. It arrives switched off, and Snipfire checks the code and test-loads your site before you switch it on.

Needs Snipfire on that site and you logged in as an administrator. Your address stays in this browser; we don't see it. Get Snipfire free

Or add it by hand

Click + New and choose PHP.
Paste the code and give it a name.
Where: Everywhere (runs as WordPress loads).
Save and switch it on.

Works in any snippet plugin, or a child theme's functions.php. Without the safety net, though.

Good to know

In these packs

More Performance snippets

Move your snippets over this afternoon.