点击保存图片到移动图片库

Question

下面的代码允许在桌面上单击下载图像，但不适用于移动设备；（

示例可以在下面找到：

var test = $(".test").get(0);
    $(document).on('click', '.save_btn', function(e) {
        e.preventDefault();

        html2canvas(test).then(function(canvas) {
            var canvasWidth = canvas.width;
            var canvasHeight = canvas.height;
            var img = Canvas2Image.convertToImage(canvas, canvasWidth, canvasHeight);
            var imgURL = canvas.toDataURL("image/png");
            
            // render image
            return Canvas2Image.saveAsPNG(canvas);
        });
    });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.js"></script>


<div style="width: 400px;" class="test"> HTML Container </div>
<a href="javascript:void(0);" class="save_btn"> Save And Download </a>

<!-- Plugins I have used: canvas2image.js, html2canvas.js -->

示例：JSFiddle