Javascript Browser Window prompt() Method

Introduction

Display a prompt box which ask the user for her/his name, and output a message:

Click the button to demonstrate the prompt box.

View in separate window 

<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Test</button>
<p id="demo"></p>
<script>
function myFunction() {/*from  w ww.j a  va 2  s  . c o m*/
  var person = prompt("Please enter your name", "Harry Potter");
  if (person != null) {
    document.getElementById("demo").innerHTML =
    "Hello " + person + "! How are you today?";
  }
}
</script>

</body>
</html>

The prompt() method displays a dialog box that prompts users for input.

The prompt() method returns the input value if the user clicks "OK".

If the user clicks "cancel" the method returns null. 

prompt(text, defaultText);

Parameter Values

Parameter Type Description
textString Required. The text to display in the dialog box
defaultText String Optional. The default input text

If the user clicks OK without entering any text, an empty string is returned.




PreviousNext

Related