ltdc_category_count_async.js

// Desc: Asynchronous recursive crawl report the total number of products by category
// Usage: catCount.init();

var catCount = (function(_d,_q){
    "use strict";
    let aSub = [];
    console.clear();

    
    return {
        init: function(){ // Get ref to all product categories in the left nav
            aSub = [].slice.call( _d.querySelectorAll( _q ) ).filter(function( el ){
                return (( el.firstChild.nodeValue ) && ( el.href ));
            } );
            aSub.forEach( function( elLink ){
                if( elLink ) catCount.asyncTotal( elLink );
            } );
        },
        parse: function( _Name, _Contents ){
            let aTotl = _Contents.split("sizeTotalNumRecs");
            if( aTotl[1].split('"')[2] ){
                 console.log( _Name, aTotl[1].split('"')[2]);
            }
            return true;
        },
        asyncTotal: function( _elLink ){
            let oXhr = new XMLHttpRequest();
            oXhr.open("GET", _elLink.href, true);
            oXhr.onreadystatechange = function(){
                if( this.readyState!==4 || this.status!==200 ) return;
                catCount.parse( _elLink.firstChild.nodeValue, this.responseText );
            };
            oXhr.send();
        }
    }

})(document, "LI.item nav > a" );
catCount.init();