HTML fullscreenchange事件用法及代码示例

当用户以全屏模式查看元素时，发生全屏更改事件。element.requestFullscreen()方法用于查看全屏模式，而element.exitFullscreen()方法用于取消全屏模式。

用法:

在HTML中：
```
<element onfullscreenchange="myScript">
```

在JavaScript中：

object.onfullscreenchange = function(){myScript};

在JavaScript中，使用addEventListener()方法：

object.addEventListener("fullscreenchange", myScript);

以下示例说明了HTML DOM中的fullscreenchange事件：

范例1：本示例说明HTML DOM fullscreenchange事件。

<!DOCTYPE html> 
<html> 
  
<head> 
    <meta name="viewport" 
    content="width=device-width, initial-scale=1"> 
</head> 
  
<body onfullscreenchange="function()"> 
    <center> 
    <h1 id="geeks" style="color:green;"> 
                                GeeksforGeeks</h1> 
    <h3>Fullscreen with JavaScript</h3> 
    <p>Click on the button to open this 
                      page in fullscreen mode.</p> 
    <button onclick="openFullscreen();"> 
                          Fullscreen Mode</button> 
    <button onclick="closeFullscreen();"> 
           Close Fullscreen or pres "Esc"</button> 
      
    <script> 
        var gfg = document.documentElement; 
        function openFullscreen() { 
            if (gfg.requestFullscreen) { 
                gfg.requestFullscreen(); 
            } 
        } 
        function closeFullscreen() { 
            if (document.exitFullscreen) { 
                document.exitFullscreen(); 
            }  
        } 
          
    </script> 
</body> 
  
</html>

输出：

范例2：本示例将JavaScript用于fullscreenchange事件。

<!DOCTYPE html> 
<html> 
  
<head> 
    <meta name="viewport" 
    content="width=device-width, initial-scale=1"> 
</head> 
  
<body> 
    <center> 
    <h1 id="geeks" style="color:green;"> 
                                GeeksforGeeks</h1> 
    <h3>Fullscreen with JavaScript</h3> 
    <p>Click on the button to open this 
                      page in fullscreen mode.</p> 
    <button onclick="openFullscreen();"> 
                          Fullscreen Mode</button> 
    <button onclick="closeFullscreen();"> 
           Close Fullscreen or pres "Esc"</button> 
  
    <script> 
        var gfg = document.documentElement; 
        function openFullscreen() { 
            if (gfg.requestFullscreen) { 
                gfg.requestFullscreen(); 
            } 
        } 
        function closeFullscreen() { 
            if (document.exitFullscreen) { 
                document.exitFullscreen(); 
            }  
        } 
        var output = document.getElementById("geeks"); 
        document.onfullscreenchange (function() { 
        }); 
    </script> 
</body> 
  
</html>

输出：

范例3：此示例对全屏更改事件使用addEventListener()方法。

<!DOCTYPE html> 
<html> 
  
<head> 
    <meta name="viewport" 
    content="width=device-width, initial-scale=1"> 
</head> 
  
<body> 
    <center> 
    <h1 id="geeks" style="color:green;"> 
                               GeeksforGeeks</h1> 
    <h3>Fullscreen with JavaScript</h3> 
    <p>Click on the button to open this  
                     page in fullscreen mode.</p> 
    <button onclick="openFullscreen();"> 
                         Fullscreen Mode</button> 
    <button onclick="closeFullscreen();"> 
          Close Fullscreen or pres "Esc"</button> 
      
    <script> 
        var gfg = document.documentElement; 
        function openFullscreen() { 
            if (gfg.requestFullscreen) { 
                gfg.requestFullscreen(); 
            } 
        } 
        function closeFullscreen() { 
            if (document.exitFullscreen) { 
                document.exitFullscreen(); 
            }  
        } 
        var output = document.getElementById("geeks"); 
        document.addEventListener("fullscreenchange", function() { 
            output.innerHTML = "A computer science portal for geeks"; 
        }); 
    </script> 
</body> 
  
</html>

输出：

支持的浏览器：

谷歌浏览器45.0
Internet Explorer 11.0
Firefox 47.0
苹果Safari 5.1
Opera 15.0

相关用法

注：本文由纯净天空筛选整理自Vijay Sirra大神的英文原创作品 HTML | DOM fullscreenchange Event。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。