点击截图功能 js canvas

时间：2021-09-11 11:31:47

使用:html2canvas实现浏览器截图

<html>

    <head>

        <meta name="layout" content="main">

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>

        <script type="text/javascript" src="http://html2canvas.hertzen.com/build/html2canvas.js"></script>

        <script type="text/javascript">

            $(document).ready(function() {

                $(".example1").on("click", function(event) {

                    event.preventDefault();

                    html2canvas($(".aa"), {

                     // height: $(".aa").outerHeight() + 20,

                        allowTaint: true,

                        taintTest: false,

                        onrendered: function(canvas) {

                            canvas.id = "mycanvas";

                            //document.body.appendChild(canvas);

                            //生成base64图片数据

                            var dataUrl = canvas.toDataURL();

                            var newImg = document.createElement("img");

                            newImg.src = dataUrl;

                            newImg.className = 'img'

                            $(".product").before(newImg);

                        }

                    });

                });

            });

        </script>

    </head>

    <body>

        Hello!

        <div class="aa" style="background-color: #abc;">

            test test test test test test

        </div>

        <textArea id="textArea" col="20" rows="10"></textArea>

        生成界面如下：

        <div class="product">

            <input class="example1" type="button" value="button">

        </div>

    </body>

</html>

参考：http://www.cnblogs.com/yanweidie/p/5203943.html#_label0

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