HTML | DOM console.time() Method

The console.time() method in HTML is used to starting a timer in the console view. The console.time() method can be used for calculating the time of programs for various testing purposes. The label is sent as a parameter to the console.time() method.

Syntax:

console.time( label )

Parameters: This method accepts single parameter label which is optional and used to specify the label of the timer.

Below programs illustrate the console.time() method in HTML:

Example 1:

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<!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>   

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Output:

Console View:

Example 2: Calculate the time taken by a while loop using console.time() method

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<!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>

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Output:

Console View:

Supported Browsers: The browser supported by console.time() Method are listed below:

  • Google Chrome
  • Internet Explorer 11.0
  • Firefox 10.0
  • Opera
  • Safari 4.0


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