将图片链接直接转成base64位编码

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将图片链接直接转成base64位编码

       function getBase64Image(img) {            var canvas = document.createElement("canvas");            canvas.width = img.width;            canvas.height = img.height;            var ctx = canvas.getContext("2d");            ctx.drawImage(img, 0, 0, img.width, img.height);            var ext = img.src.substring(img.src.lastIndexOf(".")+1).toLowerCase();            var dataURL = canvas.toDataURL("image/"+ext);            return dataURL;        }        var imgLink = "你的链接";        var tempImage = new Image();        tempImage.src = imgLink;        tempImage.crossOrigin = "*";        tempImage.onload = function(){            var base64 = getBase64Image(tempImage);            console.log(base64);        }

image.crossOrigin = "*"是防止跨域请求时报错Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may n

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