WooCommerce: trigger event after change of variation

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In case anyone stumbles across this in the future:
WooCommerce provides triggers throughout the add-to-cart-variation.js which allows you to hook into change events for the website. You can find all of them available in that file, but one which will likely help most in this case can be used as such

$( ".variations_form" ).on( "woocommerce_variation_select_change", function () {
    // Fires whenever variation selects are changed
} );

$( ".single_variation_wrap" ).on( "show_variation", function ( event, variation ) {
    // Fired when the user selects all the required dropdowns / attributes
    // and a final variation is selected / shown
} );

Where the trigger you want to hook into is the first argument inside .on(). Here’s a few below to get you started:

woocommerce_variation_select_change Fires when the select is changed.

show_variation is fired when it finds a variation, and will actually pass you the variation object that is found so you can get direct access to the price without having to filter through the selects manually.

You can sift through and find the rest here.

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