js 怎么改变URL图片的大小并生成新的URL

大小并生成新的URL"/>

js 怎么改变URL图片的大小并生成新的URL

我想做的是要将原始图片缩小，并且生成新的地址

var canvas1 = document.createElement("canvas");document.body.appendChild(canvas1);var context = canvas1.getContext("2d");var img = new Image();img.setAttribute("crossOrigin", "anonymous");//不加这个会连接会是空白的img.src = url;img.onload = oEvent => {console.log(img.width, "img.width");console.log(img.height, "img.height");canvas1.width = img.width;canvas1.height = img.height;canvas1.fillStyle = "#FF000000";img.height = img.height * percentage;img.width = img.width * percentage;img.crossOrigin = "anonymous";//不加这个会连接会是空白的canvas1.setAttribute("width", img.width + "px");canvas1.setAttribute("height", img.height + "px");console.log(img, canvas1.toDataURL());context.drawImage(img, 0, 0, img.width, img.height);let a = canvas1.toDataURL();url = canvas1.toDataURL(););};