HTML KeyboardEvent code用法及代码示例

HTML中的keyboardEvent代码属性表示键盘上的物理键。它用于返回触发事件的键。

用法:

event.code

返回值：它返回一个代表按下哪个键的字符串。

范例1：带KeyDown事件

<code class="html"><html> 
  
<head> 
    <title>DOM keyboardEvent code Property</title> 
</head> 
  
<body style="text-align:center;"> 
    
    <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
  
    <h2> 
            DOM keyboardEvent code Property 
        </h2>  
    
      Input:
    <input type="text" placeholder="Press any key.."> 
  
    <p id="p"></p> 
  
    <script> 
        // Adding a event listener function 
        window.addEventListener("keydown", function(event) { 
            var code = "keydown code = '" + 
                event.code + "'" + "<br/>"; 
  
            // Creating a span element 
            var element = document.createElement("span"); 
            element.innerHTML = code; 
  
            // Appending the created element to paragraph 
            document.getElementById("p").appendChild(element); 
        }, true); 
    </script> 
</body> 
  
</html>code>

输出：

范例2：带有KeyPress事件

<code class="html"><html> 
  
<head> 
    <title>DOM keyboardEvent code Property</title> 
</head> 
  
<body style="text-align:center;"> 
    <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
  
    <h2> 
            DOM keyboardEvent code Property 
        </h2> 
    
      Input:
    <input type="text" placeholder="Press any key.."> 
  
    <p id="p"></p> 
  
    <script> 
        // Adding a event listener function 
        window.addEventListener("keypress", function(event) { 
            var code = "keypress code = '" + 
                event.code + "'" + "<br/>"; 
  
            // Creating a span element 
            var element = document.createElement("span"); 
            element.innerHTML = code; 
  
            // Appending the created element to paragraph 
            document.getElementById("p").appendChild(element); 
        }, true); 
    </script> 
</body> 
  
</html>            code>

输出：

范例3：带KeyUp事件

<code class="html"><html> 
  
<head> 
    <title>DOM keyboardEvent code Property</title> 
</head> 
  
<body style="text-align:center;"> 
    <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
  
    <h2> 
            DOM keyboardEvent code Property 
        </h2>  
    
      Input:
    <input type="text" placeholder="Press any key.."> 
  
    <p id="p"></p> 
  
    <script> 
        // Adding a event listener function 
        window.addEventListener("keyup", function(event) { 
            var code = "keyup code = '" + 
                event.code + "'" + "<br/>"; 
  
            // Creating a span element 
            var element = document.createElement("span"); 
            element.innerHTML = code; 
  
            // Appending the created element to paragraph 
            document.getElementById("p").appendChild(element); 
        }, true); 
    </script> 
</body> 
  
</html>            code>

输出：

支持的浏览器：下面列出了keyboardEvent代码属性支持的浏览器：

苹果Safari 10.0
谷歌浏览器48.0
Firefox 32.0
Opera
Internet Explorer不支持

相关用法

注：本文由纯净天空筛选整理自Vishal Chaudhary 2大神的英文原创作品 HTML | DOM KeyboardEvent code Property。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。