js根据url直接下载图片

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.createEleme

夜空繁星vv

3250人浏览 · 2022-04-28 11:36:21

夜空繁星vv · 2022-04-28 11:36:21 发布

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"); //得到图片的base64编码数据
    	    let a = document.createElement("a"); // 生成一个a元素
    	    let event = new MouseEvent("click"); // 创建一个单击事件
    	    a.download = name || "photo"; // 设置图片名称
    	    a.href = url; // 将生成的URL设置为a.href属性
    	    a.dispatchEvent(event); // 触发a的单击事件
    	  };
    	  image.src = imgsrc;
    	};