电商 天猫主图下载

var script = document.createElement('script');script.src = "https://cdn.bootcdn.net/ajax/libs/jquery/1.12.4/jquery.min.js";
document.head.appendChild(script);


var download_img = function (img_src, name) {
    var image = new Image();
    image.setAttribute("crossOrigin", "anonymous");
    image.onload = function () {
        var canvas = document.createElement("canvas");
        canvas.width = image.width;
        canvas.height = image.height;
        var context = canvas.getContext("2d");
        context.drawImage(image, 0, 0, image.width, image.height);
        var url = canvas.toDataURL("image/png");
        var a = document.createElement("a");
        var event = new MouseEvent("click");
        a.download = name || "photo";
        a.href = url;
        a.dispatchEvent(event);
    };
    image.src = img_src;
};

var tianmao_phone_main_pic = function () {
    var num = 1;
    $("ul.PicGallery--thumbnails--1cEhJzK li img").each(function (index) {
        var index = num;// 当前图片的索引
        var name = "img" + index + ".png";// 图片的名称
        var url = $(this).attr("src");
        var lastIndex = url.lastIndexOf("_110");
        url = url.substring(0, lastIndex);

        url = "https:" + url;
        download_img(url, name);
        num++;
    });
};

tianmao_phone_main_pic();