More "Try it Yourself" examples below.
Definition and Usage
The alert() method displays an alert box with a specified message and an OK button.
An alert box is often used if you want to make sure information comes through to the user.
Note: The alert box takes the focus away from the current window, and forces the browser to read the message. Do not overuse this method, as it prevents the user from accessing other parts of the page until the box is closed.
Browser Support
| Method | |||||
|---|---|---|---|---|---|
| alert() | Yes | Yes | Yes | Yes | Yes |
Syntax
alert(message)
Parameter Values
| Parameter | Type | Description |
|---|---|---|
| message | String | Optional. Specifies the text to display in the alert box, or an object converted into a string and displayed |
Technical Details
| Return Value: | No return value |
|---|
More Examples
Related Pages
Window Object: href="met_win_confirm.html">confirm() Method
Window Object: href="met_win_prompt.html">prompt() Method
< Window Object