SOURCE

     var url2 = 'https://detail.tmall.com/item.htm?id=638005051622&rn=75d4c727a775b386c6e5b47414d6153c&abbucket=9';
        var temp2 = url2.split('?')[1];
        var pram2 = new URLSearchParams('?'+temp2);
        console.log(pram2.get('id')); 
        
        console.log(temp2);