使用jquery直接下载图片

function downloadImage(src) {    var a = $("<a></a>").attr("href", src).attr("download", "img.png").appendTo("body");    a[0].click();    a.remove();}

IE下使用canvas 然后通过然msSaveBlob来方法保存图片function downloadImage(src) {    var canvas = document.createElement(‘canvas‘);    var img = document.createElement(‘img‘);    img.onload = function(e) {        canvas.width = img.width;        canvas.height = img.height;        var context = canvas.getContext(‘2d‘);        context.drawImage(img, 0, 0, img.width, img.height);        window.navigator.msSaveBlob(canvas.msToBlob(),‘image.jpg‘);    }    img.src = src;}