woocommerce dynamic gallery : setup image variation on get parameters

201801-product-show-get.js

jQuery( function( $ ) {

    var gallery_container = $('.gallery_container');
var variations = {};
$('.variations select').each(function(){
    if($(this).val() != '') {
        variations[$(this).attr('id')] = $(this).val();
    }});
console.log(count_length(variations))
if( count_length(variations) > 0 ) { // If we have some variation data, show the associated images
    /*setTimeout( function() {
        gallery_container.html('');
        gallery_container.height(galleryHeight);
        gallery_container.addClass('gallery_loading');
    }, 500);*/

    var data = {
        action: 		"wc_dgallery_change_variation",
        product_id: 	a3_dgallery_variation.product_id,
        variations: 	variations,
        security: 		a3_dgallery_variation.security
    };
    $.get( a3_dgallery_variation.ajax_url, data, function(response) {
        gallery_container.removeClass('gallery_loading');
        gallery_container.css({'height':'auto'});
        response = $.parseJSON( response );
        if ( a3_dgallery_variation.variation_gallery_effect == 'fade' ) {
            gallery_container.fadeTo( parseInt( a3_dgallery_variation.variation_gallery_effect_speed ), 0 , function() {
                gallery_container.html(response);
            }).fadeTo( parseInt( a3_dgallery_variation.variation_gallery_effect_speed ), 1 );
        } else {
            gallery_container.html(response);
        }
    });

}

});

functions.php

  function breizhwave_enqueue_sscript()
{ if (is_product())
        wp_enqueue_script( 'breizhwaveProduct', get_stylesheet_directory_uri() . '/wavejss/bw201801-product-show-get' . $min. '.js', array('jquery'), false, true );
}

add_action( 'wp_enqueue_scripts', 'breizhwave_enqueue_sscript',2000 );

Little bug fix / new feature for very good woocommerce plugin https://a3rev.com/shop/woocommerce-dynamic-gallery/
when pre selecting attributes via GET arguments on product page,
the associated variation image was not shown

https://support.a3rev.com/forums/topic/preselecting-variation-set-image-not-synchronizing/