What is the use of the Event.preventDefault() method in Event Handling in JavaScript ?
Last Updated :
30 Jan, 2024
The Event.preventDefault()
method in JavaScript is used within event handlers to prevent the default behavior associated with an event from taking place. When an event occurs, such as a click on a link or the submission of a form, there is often a default action associated with that event. preventDefault()
allows developers to stop this default behavior from happening.
Common use cases for preventDefault()
include:
- Form Submission: Preventing the default form submission behavior allows developers to handle form data using asynchronous techniques (e.g., AJAX) or to perform client-side validation before submitting the form.
- Link Clicks: When dealing with navigation links, developers might want to perform some actions on the page dynamically without navigating to a new URL.
- Key Events: For certain key events, such as the Enter key in a form input, preventing the default behavior can be used to control whether a form is submitted or not.
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