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JS - 点击直接下载

js

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);
};

html

<span onclick="download('http://omuy6viz3.bkt.clouddn.com/2017/05/3660632723.jpg')">下载原图</span>
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