HTML | Window alert( ) Method

The Window 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.

<!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> 

Output:

After clicking the button

Supported Browsers: The browser supported by Window alert( ) Method are listed below:

Google Chrome
Internet Explorer
Firefox
Opera
Safari

My Personal Notes

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Shubrodeep Banerjee

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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