Interview Questions
jQuery is a fast, small, and feature-rich JavaScript library. It simplifies things like HTML document
traversal and manipulation, event handling, and animation, making it much easier to use JavaScript on your
website.
$(document).ready(): Executes code when the DOM is fully loaded, but before images and other external
content are fully loaded.
$(window).load(): Executes code when the entire page, including all images and resources, is fully loaded.
The $.ajax() method is used for performing asynchronous HTTP requests. It can handle different types of
requests such as GET, POST, PUT, DELETE, etc. The method allows setting options like URL, type, data,
success, and error handling.
You can add HTML elements using methods like append(), prepend(), after(), and before().
Chaining is a technique in jQuery that allows you to perform multiple actions on an element within a
single statement.
The .each() function is used to iterate over a collection of elements. It takes a callback function that
is executed for each matched element.
Event delegation is a technique where you attach a single event handler to a parent element to manage
events for current and future child elements. It leverages event bubbling and reduces the number of event
handlers in your code.
You can stop the execution of an event using event.preventDefault() to prevent the default action, and
event.stopPropagation() to prevent the event from bubbling up the DOM tree.
You can check if an element exists by using the .length property. If the length is greater than 0, the
element exists.
This: Refers to the DOM element in a regular JavaScript context.$(this): Wraps the DOM element with a
jQuery object, allowing you to use jQuery methods on it.
