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HTML | DOM console.warn() Method

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  • Difficulty Level : Basic
  • Last Updated : 04 Jul, 2022
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The console.warn() method is used to write a warning message in the console. So open the console to display the output (warning message). 

Syntax:

console.warn( message )

Parameters: This method accepts single parameter message which is mandatory. This parameter is used to hold the warning message. 

Example 1: 

html




<!DOCTYPE html>
<html>
 
<head>
    <title>console.warn() Method</title>
    <style>
        h1 {
            color: green;
        }
         
        body {
            text-align: center;
        }
    </style>
</head>
 
<body>
    <h1>GeeksforGeeks</h1>
    <h2>HTML console.warn() Method</h2>
    <p>Press F12 to view the message</p>
    <script>
        console.warn
            ("This is a warning message for geeksforgeeks!");
    </script>
</body>
 
</html>


Output:

  

Example 2: 

html




<!DOCTYPE html>
<html>
 
<head>
    <title>console.warn() Method</title>
    <style>
        h1 {
            color: green;
        }
         
        body {
            text-align: center;
        }
    </style>
</head>
 
<body>
    <h1>GeeksforGeeks</h1>
    <h2>HTML console.warn() Method</h2>
    <p>Press F12 to view the message</p>
    <script>
        var Arr = ["Algorithm", "GeeksforGeeks", "Geeks"];
        console.warn(Arr);
    </script>
</body>
 
</html>


Output:

  

Supported Browsers: The browser supported by console.warn() method are listed below:

  • Chrome 1.0
  • Edge 12.0
  • Internet Explorer 8.0
  • Firefox 4.0
  • Opera 10.5
  • Safari 3

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