前端圖片下載

http://www.javashuo.com/article/p-ohvauvhu-ka.html

http://www.javashuo.com/article/p-yunccuvr-dz.html

//會從新打開一個瀏覽器窗口，後續在作研究，用canvas.todataURL又不能下載跨域圖片

$(function () {
    function download(src) {
        var $a = document.createElement('a');
        $a.setAttribute("href", src);
        $a.setAttribute("download", "");
        var evObj = document.createEvent('MouseEvents');
        evObj.initMouseEvent( 'click', true, true, window, 0, 0, 0, 0, 0, false, false, true, false, 0, null);
        $a.dispatchEvent(evObj);
        console.log("下載成功")
    };
    download("https://www.baidu.com/img/bd_logo1.png")
})