Simply Unload scripts and styles in WordPress, without plugins

This is how you unload scripts and styles in WordPress:
Just add this code to your functions.php or to custom functions file:

// Dequeue a specific stylesheet
function dequeue_unused_styles() {
    wp_dequeue_style( 'unused-stylesheet' );
    wp_deregister_style( 'unused-stylesheet' );
}
add_action( 'wp_print_styles', 'dequeue_unused_styles', 100 );

// Dequeue a specific script
function dequeue_unused_scripts() {
    wp_dequeue_script( 'unused-script' );
    wp_deregister_script( 'unused-script' );
}
add_action( 'wp_print_scripts', 'dequeue_unused_scripts', 100 );

This code snippet uses the wp_dequeue_style() and wp_deregister_style() functions to dequeue and deregister a specific stylesheet, and the wp_dequeue_script() and wp_deregister_script() functions to dequeue and deregister a specific script. You need to replace “unused-stylesheet” and “unused-script” with the actual handle of the stylesheet and script you want to dequeue and deregister.

Here’s an example of how you can dequeue and deregister a specific stylesheet on only the “contact” page and a specific javascript file on only the “home” page:

add_action( 'wp_enqueue_scripts', 'my_dequeue_scripts' );
function my_dequeue_scripts() {
    if ( is_page( 'contact' ) ) {
        wp_dequeue_style( 'unwanted-stylesheet' );
        wp_deregister_style( 'unwanted-stylesheet' );
    }
    if ( is_page( 'home' ) ) {
        wp_dequeue_script( 'unwanted-javascript' );
        wp_deregister_script( 'unwanted-javascript' );
    }
}

In this example, I am using the is_page() function to check if the current page is the “contact” page or “home” page, and if it is, then I am using the wp_dequeue_style() and wp_deregister_style() functions to remove the unwanted stylesheet and the wp_dequeue_script() and wp_deregister_script() functions to remove the unwanted javascript. You need to replace ‘unwanted-stylesheet’ and ‘unwanted-javascript’ with the handle of the stylesheet and javascript file you want to remove, respectively.

You can also use other conditional tags like is_home(), is_front_page(), is_single(), is_singular() etc. to target specific pages, posts or custom post types.

Please keep in mind that you should always test your changes on a development or staging site before applying them to a live site, as modifying the functions.php file can cause errors or conflicts if not done correctly.