HTML | Window alert( ) Method

The alert() method is used to display an alert box. It displays a specified message along with an OK button and is generally used to make sure that the information comes through the user.
It returns a string which represents the text to display in the alert box.

Syntax:

alert(message)

Below program illustrates the Window alert() Method :

Displaying an alert box.

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<!DOCTYPE html>
<html>
  
<head>
    <title>Window alert() Method in HTML</title>
    <style>
        h1 {
            color: green;
        }
          
        h2 {
            font-family: Impact;
        }
          
        body {
            text-align: center;
        }
    </style>
</head>
  
<body>
  
    <h1>GeeksforGeeks</h1>
    <h2>Window alert() Method</h2>
  
    <p>For displaying the alert message,
      double click the "Show Alert Message" button: </p>
  
    <button ondblclick="myalert()">Show Alert Message</button>
  
    <script>
        function myalert() {
            alert("Welcome to GeeksforGeeks.\n " +
                "It is the best portal for computer science enthusiasts!");
        }
    </script>
  
</body>
  
</html>                                        
                              

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Output:

After clicking the button

Supported Web Browsers

  • Opera
  • Internet Explorer
  • Google Chrome
  • Firefox
  • Apple Safari


My Personal Notes arrow_drop_up

I am a technology enthusiast who has a keen interest in programming I am pursuing Engineering in Computer Science from GEU, Dehradun I like to unwind by watching movies and English sitcomsI have a keen interest in music

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