function downloadImage(src) {
console.log(src);
//src="http://192.168.12.50:8181/file/common/png/info_1526003595250.png";
var $a = document.createElement(‘a‘);
$a.setAttribute("href", src);
$a.setAttribute("download", "");
$a.setAttribute("target", "_parent");
//var evObj = document.createEvent(‘MouseEvents‘);
if( document.createEvent )
{
var evObj = document.createEvent(‘MouseEvents‘);
evObj.initMouseEvent( ‘click‘, false, false, window, 0, 0, 0, 0, 0, true, true, true, true, 0, null);
$a.dispatchEvent(evObj);
}
else if( document.createEventObject ){
$a.fireEvent(‘click‘);
}
//下面这些参数我也不知道是干嘛的，只知道第五个零後面的参数，设置为true的话会新建标签页下载完成后自动关闭
//设为false的话下载完成后不关闭
//evObj.initMouseEvent( ‘click‘, false, false, window, 0, 0, 0, 0, 0, true, true, true, true, 0, null);
//$a.dispatchEvent(evObj);
}
结论，谷歌可以，但是火狐不行，还是坑.......
