Dequeue WooCommerce CSS and JS on non-WooCommerce pages for 3.6.4

dequeue-woocommerce-js-css-on-non-woo-pages.php

<?php
//don't add above twice if it already exists


/**
 * Check if WooCommerce Page of all kinds (not just cart and shop)
 * @thanks: https://faish.al/2014/01/06/check-if-it-is-woocommerce-page/
 * Checked IDS with WooCommerce Repo 1 June 2019
 */
function ca_is_really_woocommerce_page() {

	if( function_exists ( 'is_woocommerce' ) && is_woocommerce() ) :
		return true;
	endif;
	
		$woocommerce_keys = array (
		'woocommerce_shop_page_id' ,
		'woocommerce_terms_page_id' ,
		'woocommerce_cart_page_id' ,
		'woocommerce_checkout_page_id' ,
		'woocommerce_pay_page_id' ,
		'woocommerce_thanks_page_id' ,
		'woocommerce_myaccount_page_id' ,
		'woocommerce_edit_address_page_id' ,
		'woocommerce_view_order_page_id' ,
		'woocommerce_change_password_page_id' ,
		'woocommerce_logout_page_id' ,
		'woocommerce_lost_password_page_id' ) ;
    
	foreach ( $woocommerce_keys as $wc_page_id ) :
		if ( get_the_ID () == get_option ( $wc_page_id , 0 ) ) :
			return true;
		endif;
	endforeach;
	
	return false;
}






add_action( 'wp_enqueue_scripts', 'ca_dequeue_woocommerce_js_css_on_non_woo_pages', 99 );
/**
 * Remove WooCommerce CSS and JS on non-WooCommerce pages for 3.6.4
 * Keep this updated by looking here: 
 * https://github.com/woocommerce/woocommerce/blob/44d129e45286b782fcce2ba67acf837a46e0c6c9/includes/class-wc-frontend-scripts.php
 *
 * Comment out the ones you want to keep
 * -- Remember that now any sidebar / widget / shortcode from WooCommerce used on a 
 * -- NON-Woo Page will not look good and won't work
 */
function ca_dequeue_woocommerce_js_css_on_non_woo_pages() {
    
    remove_action( 'wp_head', array( $GLOBALS['woocommerce'], 'generator' ) );
    
    if ( ! function_exists( 'is_woocommerce' ) ) return; //exit if does not exist

    // Dequeue if is not WooCommerce page and not cart and not checkout
    // Add more conditions eg ` && ! is_front_page() ` to load on front page
    if ( 
        ! ca_is_really_woocommerce_page() 
    ) :
     
        // dequeue styles
        $dequeue_style = array(
            'woocommerce-layout',
            'wc-block-style',
            'woocommerce-inline',
            'woocommerce-smallscreen',
            'woocommerce-general',
            'select2',
        );
    
        foreach ( $dequeue_style as $dstyle ) :
            wp_dequeue_style( $dstyle );
        endforeach;

        // dequeue scripts
        $dequeue_script = array(
            'flexslider',
            'js-cookie',
            'jquery-blockui',
            'jquery-cookie', //deprecated
            'jquery-payment',
            'photoswipe' ,
            'photoswipe-ui-default',
            'prettyPhoto', //deprecated
            'prettyPhoto-init', //deprecated
            'select2',
            'selectWoo',
            'wc-address-i18n',
            'wc-add-payment-method',
            'wc-cart',
            'wc-cart-fragments',
            'wc-checkout',
            'wc-country-select',
            'wc-credit-card-form',
            'wc-add-to-cart',
            'wc-add-to-cart-variation',
            'wc-geolocation',
            'wc-lost-password',
            'wc-password-strength-meter',
            'wc-single-product',
            'woocommerce',
            'zoom',
        );
    
        foreach ( $dequeue_script as $dscript ) :
            wp_dequeue_script( $dscript );
        endforeach;
    
    endif; // conditions met
    
}