HTML fullscreenchange事件用法及代碼示例

當用戶以全屏模式查看元素時，發生全屏更改事件。element.requestFullscreen()方法用於查看全屏模式，而element.exitFullscreen()方法用於取消全屏模式。

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);

以下示例說明了HTML DOM中的fullscreenchange事件：

範例1：本示例說明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>

輸出：

範例2：本示例將JavaScript用於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>

輸出：

範例3：此示例對全屏更改事件使用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>

輸出：

支持的瀏覽器：

穀歌瀏覽器45.0
Internet Explorer 11.0
Firefox 47.0
蘋果Safari 5.1
Opera 15.0

相關用法

注：本文由純淨天空篩選整理自Vijay Sirra大神的英文原創作品 HTML | DOM fullscreenchange Event。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。