Javascript | Window prompt() Method
The prompt() method is used to display a dialog with an optional message prompting the user to input some text. It is often used if the user wants to input a value before entering a page.
It returns a string containing the text entered by the user, or null.
Syntax:
prompt(message, default)
- message is a string of text to display to the user.It can be omitted if there is nothing to show in the prompt window i.e. it is optional.
- default is a string containing the default value displayed in the text input field. It is also optional.
Example:
<!DOCTYPE html><html> <head> <title> Window prompt() Method </title></head> <body style="text-align: center;"> <h1 style="color:green;"> GeeksforGeeks </h1> <h2> Window prompt() Method </h2> <button onclick="geek()"> Click me! </button> <p id="g"></p> <script> function geek() { var doc = prompt("Please enter some text", "GeeksforGeeks"); if (doc != null) { document.getElementById("g").innerHTML = "Welcome to " + doc; } } </script></body> </html> |
Output:
Before clicking the button:
After clicking the Click me! button:
After pressing the OK button in dialog box:
Supported Browsers: The browser supported by window prompt() method are listed below:
- Google Chrome
- Internet Explorer
- Firefox
- Opera
- Safari
