简单实现 iframe 全屏显示

旧城等待， 2023-10-08 10:25 16阅读 0赞

## 需求 ##

*  点击**全屏**按钮，让页面iframe全屏展示
 *  点击**退出全屏**按钮，让页面iframe退出全屏

## 代码实现 ##

*  HTML代码实现

<!doctype html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport"
              content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
        <meta http-equiv="X-UA-Compatible" content="ie=edge">
        <title>Document</title>
        <style>
            * {
         margin: 0;padding: 0;}
            .content-parent {
         width: 800px;height: 600px;margin: 0 auto;background-color: aquamarine;}
            .content-parent h1 {
         text-align: center;}
            /*设置全屏样式*/
            #iframe-one:-webkit-full-screen {
         width: 100%;height: 100%;}
        </style>
    </head>
    <body>
    <div class="content-parent">
        <button id="goAmpl">子页面全屏化</button>
        <button id="outAmpl"></button>
        <iframe id="iframe-one" name="iframe-one" src="https://www.baidu.com" width="100%" height="200" scrolling="no"
                frameborder="0"></iframe>
     
    </div>
    </body>
    </html>

*  JavaScript 代码实现

/**
         * 进入全屏
         * @param element
         */
        function requestFullScreen(element) {
        
            var requestMethod = element.requestFullScreen || element.webkitRequestFullScreen || element.mozRequestFullScreen || element.msRequestFullScreen;
            if (requestMethod) {
        
                requestMethod.call(element);
            } else if (typeof window.ActiveXObject !== "undefined") {
        
                var wscript = new ActiveXObject("WScript.Shell");
                if (wscript !== null) {
        
                    wscript.SendKeys("{F11}");
                }
            }
        }
    
    
        /**
         * 退出全屏
         */
        function exitFullscreen() {
        
            if (document.exitFullscreen) {
        
                document.exitFullscreen();
            } else if (document.msExitFullscreen) {
        
                document.msExitFullscreen();
            } else if (document.mozCancelFullScreen) {
        
                document.mozCancelFullScreen();
            } else if (document.webkitExitFullscreen) {
        
                document.webkitExitFullscreen();
            }
        }
        
        document.getElementById('goAmpl').onclick = function () {
        
            let iframe = document.getElementById("iframe-one");
            requestFullScreen(iframe);
        }
        document.getElementById('outAmpl').onclick = function () {
        
            let iframe = document.getElementById("iframe-one");
            exitFullscreen(iframe);
        }

## 注意 ##

*  如果div不设置`background style`则使用`webkitRequestFullScreen`全屏时，div会被黑色填充
 *  WebKit 不会自动添加全屏样式，需要手动实现

#iframe-one:-webkit-full-screen {
        
    		width: 100%;
    		height: 100%;
    	}