function init() {
    if (window.location.href.startsWith('https://www.aliexpress.us/item/')) {
        const popup = document.createElement("div")
        popup.innerText = "下载图片"
        const styles = {
            position: "fixed",
            right: '10px',
            top: '60px',
            zIndex: 9999,
            padding: "8px",
            background: "#409EFF",
            color: "#fff",
            borderRadius: "8px",
            cursor: "pointer"
        }
        for (const e in styles) {
            popup.style[e] = styles[e]
        }

        popup.addEventListener('click', async () => {
            let obj = window.runParams.data;
            let id = obj.productInfoComponent.idStr

            var baseList = [];
            var downloadList = []

            var imgObjList = document.querySelectorAll('#product-description img')
            for (var i = 0; i < imgObjList.length; i++) {
                baseList.push({type: 0, index: i+1, src: imgObjList[i].src})
            }

            for (var j = 0; j < obj.imageComponent.imagePathList.length; j++) {
                baseList.push({type: 1, index: j+1, src: obj.imageComponent.imagePathList[j]})
            }

            var zip = new JSZip();
            var imgsBanner = zip.folder("轮插图");
            var imgsDetail = zip.folder("详情图");
            for (var k = 0; k < baseList.length; k++) {
                let type = baseList[k].type
                let index = baseList[k].index
                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(); // 得到图片的base64编码数据
                  canvas.toDataURL("image/png");
                  downloadList.push({type: type, index: index, data: url.substring(22)}); // 去掉base64编码前的     data:image/png;base64,
                  if (downloadList.length === baseList.length && downloadList.length > 0) {
                    for (let l = 0; l < downloadList.length; l++) {
                        if (downloadList[l].type == '0') {
                            imgsDetail.file(`详情图${downloadList[l].index}.png`, downloadList[l].data, { base64: true });
                        } else if (downloadList[l].type == '1') {
                            imgsBanner.file(`轮播图${downloadList[l].index}.png`, downloadList[l].data, { base64: true });
                        } 
                    }
                    zip.generateAsync({ type: "blob" }).then(function (content) {
                      // see FileSaver.js
                      saveAs(content, "aliexpress_" + id + ".zip");
                    });
                  }
                };
                image.src = baseList[k].src;
              }
        })
        document.body.appendChild(popup)
    }
}

init();