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How to show prompt dialog box using JavaScript?

The prompt dialog box is very useful when you want to pop-up a text box to get user input. Thus, it enables you to interact with the user. The user needs to fill in the field and then click OK.

This dialog box is displayed using a method called prompt() which takes two parameters: (i) a label which you want to display in the text box and (ii) a default string to display in the text box.

This dialog box has two buttons: OK and Cancel. If the user clicks the OK button, the window method prompt() will return the entered value from the text box. If the user clicks the Cancel button, the window method prompt() returns null.

Example

You can try to run the following code to earn how to implement prompt dialog box using JavaScript:

Live Demo

<html>
   <head>
      <script>
         <!--
            function getValue(){
               var retVal = prompt("Enter your name : ", "your name here");
               document.write("You have entered : " + retVal);
            }
         //-->
      </script>
   </head>
   <body>
      <p>Click the following button to see the result: </p>
      <form>
         <input type="button" value="Click Me" onclick="getValue();" />
      </form>
   </body>
</html>
Updated on 08-Jan-2020 10:34:24

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