如何快速拼接下面这个字符串

Question

            let imglist = [
                { id: 1, url: "ns/upload/a.png" },
                { id: 2, url: "ns/upload/b.png" },
                { id: 3, url: "ns/upload/c.png" }
            ];
            
            
     如何获取ns/后面的图片字符串集合imgNamestr = "upload/a.png,upload/b.png,upload/c.png"

Answer 1

imglist.map(n => /^(?:ns\/)(.+?)$/.exec(n.url)[1]).join();

Answer 2

imglist.map(item=>{ return item.url.split('ns/')[1]}).join()