浏览器上的图片截图保存到本地

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>html2canvas_download</title>
    <style>
        a {
            cursor: pointer;
            color: rgb(85, 26, 139);
            text-decoration: underline;
        }
    </style>
</head>

<body>
<div id="oDiv" style="width: 300px; height: 300px; margin: 10px; background: red; border: 5px solid gray;">
    <h1>hello world!</h1>
</div>

<!-- <script type="text/javascript" src="../dist/html2canvas.js"></script> -->
<script src="https://cdn.bootcss.com/html2canvas/0.5.0-beta4/html2canvas.min.js"></script>
<script type="text/javascript">
    var oDiv = document.getElementById('oDiv');

    // body截图
    // html2canvas(document.body).then(function(canvas) {
    //     document.body.appendChild(canvas);
    // });

    html2canvas(oDiv).then(function(canvas) {
        document.body.appendChild(canvas);
        var oCavans = document.getElementsByTagName('canvas')[0];
        var strDataURI = oCavans.toDataURL();
        downLoadFn(strDataURI);
    });

    //判断浏览器类型
    function myBrowser() {
        var userAgent = navigator.userAgent; //取得浏览器的userAgent字符串
        var isOpera = userAgent.indexOf("Opera") > -1;
        if(isOpera) {
            return "Opera"
        }; //判断是否Opera浏览器
        if(userAgent.indexOf("Firefox") > -1) {
            return "FF";
        } //判断是否Firefox浏览器
        if(userAgent.indexOf("Chrome") > -1) {
            return "Chrome";
        }
        if(userAgent.indexOf("Safari") > -1) {
            return "Safari";
        } //判断是否Safari浏览器
        if(userAgent.indexOf("compatible") > -1 && userAgent.indexOf("MSIE") > -1 && !isOpera) {
            return "IE";
        }; //判断是否IE浏览器
        if(userAgent.indexOf("Trident") > -1) {
            return "Edge";
        } //判断是否Edge浏览器
    }

    //IE浏览器图片保存本地
    function SaveAs5(imgURL) {
        var oPop = window.open(imgURL, "", "width=1, height=1, top=5000, left=5000");
        for(; oPop.document.readyState != "complete";) {
            if(oPop.document.readyState == "complete") break;
        }
        oPop.document.execCommand("SaveAs");
        oPop.close();
    }

    // chrome14+,firefox20+,pera15+,Edge 13+,Safari未实现
    function download(strDataURI) {
        var link = document.createElement('a');
        link.innerHTML = 'download_canvas_image';
        link.download = 'mypainting.png';
        link.addEventListener('click', function(ev) {
            link.href = strDataURI;
        }, false);
        document.body.appendChild(link);
    };

    function downLoadFn(url) {
        if(myBrowser() === "IE" || myBrowser() === "Edge") {
            SaveAs5(url);
        } else {
            download(url);
        }
    }
</script>
</body>

</html>
浏览器上的图片截图保存到本地

猜你喜欢
