HTML DOM console.time()用法及代碼示例

HTML中的console.time()方法用於在控製台視圖中啟動計時器。 console.time()方法可用於計算各種測試目的的程序時間。標簽將作為參數發送到console.time()方法。

用法:

console.time( label )

參數：此方法接受單個參數標簽，該標簽是可選的，用於指定計時器的標簽。

以下程序說明了HTML中的console.time()方法：

範例1：

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>DOM console.time() Method in HTML</title> 
    <style> 
        h1 { 
            color:green; 
        } 
          
        h2 { 
            font-family:Impact; 
        } 
          
        body { 
            text-align:center; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>GeeksforGeeks</h1> 
    <h2>DOM console.time() Method</h2> 
    <p> 
      To view the message in the console 
      press the F12 key on your keyboard. 
    </p> 
    <p> 
      To view the time taken by a for loop 
      to run 100 times, double click the  
      button below:
    </p> 
    <br> 
    <button ondblclick="table_time()"> 
      RUN TIMER 
    </button> 
    <script> 
        function table_time() { 
            console.time(); 
            for (i = 0; i < 100; i++) { 
                // Random code 
            } 
            console.timeEnd(); 
        } 
    </script> 
</body> 
  
</html>

輸出：

控製台視圖：

範例2：使用console.time()方法計算while循環所花費的時間

<!DOCTYPE html> 
<html> 
  
<head> 
    <title>DOM console.time() Method in HTML</title> 
    <style> 
        h1 { 
            color:green; 
        } 
          
        h2 { 
            font-family:Impact; 
        } 
          
        body { 
            text-align:center; 
        } 
    </style> 
</head> 
  
<body> 
    <h1>GeeksforGeeks</h1> 
    <h2>DOM console.time() Method</h2> 
    <p> 
      To view the message in the console 
      press the F12 key on your keyboard. 
    </p> 
    <p> 
      To view the time taken by a for loop 
      to run 100 times, double click the 
      button below:
    </p> 
    <br> 
    <button ondblclick="table_time()"> 
      RUN TIMER 
    </button> 
    <script> 
        function table_time() { 
            i = 0; 
            console.time 
                ("While loop for 100 iterations"); 
            while (i < 100) { 
                i++; 
            } 
            console.timeEnd 
                ("While loop for 100 iterations"); 
        } 
    </script> 
</body> 
  
</html>

輸出：

控製台視圖：

支持的瀏覽器：console.time()方法支持的瀏覽器如下：

穀歌瀏覽器
Internet Explorer 11.0
Firefox 10.0
Opera
Safari 4.0

相關用法

注：本文由純淨天空篩選整理自Shubrodeep Banerjee大神的英文原創作品 HTML | DOM console.time() Method。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。