The HTML 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 that represents the text to display in the alert box.
Syntax:
alert(message)
Below example illustrates the Window alert() Method:
Example: In this example, we will display an alert box by double-clicking a button.
html
<h1 style="color: green;">
GeeksforGeeks
</h1>
<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>
|
Output:
Supported Browsers: The browser supported by Window alert( ) Method are listed below:
- Google Chrome 1
- Edge 12
- Internet Explorer 4
- Firefox 1
- Opera 3
- Safari 1
We have a Cheat Sheet on Javascript where we covered all the important topics of Javascript to check those please go through Javascript Cheat Sheet-A Basic guide to JavaScript.