download img throught hyperlink <a> in IE11 using javascript

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download img throught hyperlink <a> in IE11 using javascript

posted Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

download img throught hyperlink <a> in IE11 using javascript

The following code works well for Google Chrome but not for IE11.

<!DOCTYPE html>
<html>
<head>
    <title>title</title>
</head>
<body>
    <img id="img1" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAASUlEQVRo3u3PAQ0AIAwDsIGC+TcL
LkhOWgddSU6Ga5udT4iIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIi8cQEjUgGT
mE6z3QAAAABJRU5ErkJggg==" />
    <script>
        var a = document.createElement('a');
        var image = document.getElementById('img1');
        a.setAttribute('href', image.src);
        a.setAttribute("download", 'fileName');
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
    </script>
</body>
</html>

When I run this code in IE11 I've got message: "Do you want to allow this website to open an app on your computer?"

After clicking "Allow" I've got "No apps are installed to open this type of link (data)"

How to make it work in IE11?

See Question&Answers more detail:os

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1 Reply

深蓝 · Answer 1 · 2021-10-23T17:56:03+0000

This one is usefull for IE10+: http://msdn.microsoft.com/en-us/library/hh779016(v=vs.85).aspx

something like:

<!DOCTYPE html>
<html>
<head>
    <title>title</title>
</head>
<body>
    <img id="img1" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAYAAAAeP4ixAAAASUlEQVRo3u3PAQ0AIAwDsIGC+TcL
LkhOWgddSU6Ga5udT4iIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIiIi8cQEjUgGT
mE6z3QAAAABJRU5ErkJggg==" />
    <canvas id="canvas1"></canvas>
    <script>
        var image = document.getElementById('img1');
        var canvas = document.getElementById('canvas1');
        var ctx = canvas.getContext('2d');
        ctx.drawImage(image, 0, 0, image.width, image.height);
        window.navigator.msSaveBlob(canvas.msToBlob(), 'drawingFileName.png');
    </script>
</body>
</html>

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download img throught hyperlink <a> in IE11 using javascript

download img throught hyperlink <a> in IE11 using javascript

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