JS批量下载网页中的图片！

function downloadIamge(imgsrc, name) {//下载图片地址和图片名
let image = new Image();
// 解决跨域 Canvas 污染问题
      image.setAttribute("crossOrigin", "anonymous");
      image.onload = function() {
let canvas = document.createElement("canvas");
            canvas.width = image.width;
            canvas.height = image.height;
let context = canvas.getContext("2d");
            context.drawImage(image, 0, 0, image.width, image.height);
let url = canvas.toDataURL("image/png"); 
let a = document.createElement("a"); 
let event = new MouseEvent("click"); 
            a.download = name || "photo"; 
            a.href = url;
            a.dispatchEvent(event); 
      };
      image.src = imgsrc;
}

picList.map((item,index) => {
    setTimeOut((e) => {
        downloadIamge(item, index)
    })
})