WooCommerce change loading spinner icon

Question

IM trying to change the WooCommerce loading spinner icon. It's defined in the woocommerce.css:

.woocommerce .blockUI.blockOverlay::before {
    height: 1em;
    width: 1em;
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-left: -.5em;
    margin-top: -.5em;
    content: '';
    -webkit-animation: spin 1s ease-in-out infinite;
    animation: spin 1s ease-in-out infinite;
    background: url(../images/icons/loader.svg) center center;
    background-size: cover;
    line-height: 1;
    text-align: center;
    font-size: 2em;
    color: rgba(0,0,0,.75);
}

I've tried changing the loader.svg with a custom css:

.woocommerce .blockUI.blockOverlay::before {
     background: url(http://www.localhost.de/wp-content/uploads/custom-loader.svg) center center !important;
}

But the icon will not change. So I've googled a bit and found this here:

add_filter( 'woocommerce_ajax_loader_url', 'custom_loader_icon', 10, 1 );
function custom_loader_icon() {
    return __( get_home_path() . 'wp-content/uploads/custom-loader.svg', 'woocommerce' );
}

But the loading spinner icon is still the same. What can I do to change it? I don't know what I should try now...

Answer 1

The following code css rules work in Woocommerce last version. I have embedded them in the wp_head hook as it's easy for testing:

You will use this icon for testing, that you will put in your active child theme under an "img" directory, renaming the file my_spinner.gif.

If you use a theme instead of a child theme, you will use get_template_directory_uri() function instead of get_stylesheet_directory_uri() in the code.

The code:

add_action('wp_head', 'custom_ajax_spinner', 1000 );
function custom_ajax_spinner() {
    ?>
    <style>
    .woocommerce .blockUI.blockOverlay:before,
    .woocommerce .loader:before {
        height: 3em;
        width: 3em;
        position: absolute;
        top: 50%;
        left: 50%;
        margin-left: -.5em;
        margin-top: -.5em;
        display: block;
        content: "";
        -webkit-animation: none;
        -moz-animation: none;
        animation: none;
        background-image:url('<?php echo get_stylesheet_directory_uri() . "/img/my_spinner.gif"; ?>') !important;
        background-position: center center;
        background-size: cover;
        line-height: 1;
        text-align: center;
        font-size: 2em;
    }
    </style>
    <?php
}

Code goes in function.php file of your active child theme (or active theme). Tested and works.