- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
What is an alert box in JavaScript?
An alert dialog box is mostly used to give a warning message to the users. For example, if one input field requires to enter some text but the user does not provide any input, then as a part of validation, you can use an alert box to give a warning message.
Nonetheless, an alert box can still be used for friendlier messages. Alert box gives only one button "OK" to select and proceed.
Example
You can try to run the following code to learn how to add an alert box −
<html>
<head>
<script>
<!--
function Warn() {
alert ("This is a warning message!");
document.write ("This is a warning message!");
}
//-->
</script>
</head>
<body>
<p>Click the following button to see the result: </p>
<form>
<input type="button" value="Click Me" onclick="Warn();" />
</form>
</body>
</html>
- Related Articles
- How to customize the position of an alert box using JavaScript?
- Create an alert message box with Bootstrap
- How to provide new line in JavaScript alert box?
- How to show image in alert box using JavaScript?
- How to display JavaScript variable value in alert box?
- How to edit a JavaScript alert box title?
- How to center the JavaScript alert message box?
- How to change button label in alert box using JavaScript?
- How to design a custom alert box using JavaScript?
- How I can replace a JavaScript alert pop up with a fancy alert box?
- How do I display image in alert/confirm box in JavaScript?
- How to change the color of the alert box in JavaScript?
- How to create and apply CSS to JavaScript Alert box?
- Add a fading effect when closing an alert box in Bootstrap
- How I can change the style of alert box using JavaScript?
Advertisements