JQuery Introduction

jQuery is a lightweight, "write less, do more", JavaScript library. The purpose of jQuery is to make it much easier to use JavaScript on your website. jQuery takes a lot of common tasks that require many lines of JavaScript code to accomplish, and wraps them into methods that you can call with a single line of code.In jQuery, the class and ID selectors are like those in CSS. Here's an example of a jQuery method that selects all paragraph elements, and adds a class of "selected" to them:This is a paragraph selected by a jQuery method. This is also a paragraph selected by a jQuery method.jQuery is an open-source JavaScript library that simplifies the interactions between an HTML/CSS document, or more precisely the Document Object Model (DOM). jQuery simplifies HTML document traversing and manipulation, browser event handling, DOM animations, Ajax interactions, and cross-browser JavaScript development. At its core, jQuery is used to connect with HTML elements in the browser via the DOM. The Document Object Model (DOM) is the method by which JavaScript (and jQuery) interact with the HTML in a browser. To view exactly what the DOM is, in your web browser, right click on the current web page select “Inspect”.jQuery is a JavaScript framework. It facilitates the readability and the manipulation of HTML DOM elements, event handling, animations, and AJAX calls. It's also free, open-source software that adheres to the MIT License. As a result, it is one of the most popular JavaScript libraries.Nowadays, It is not necessary to learn Jquery for the web development. You can use js instead of that and js can perform much better than jquery. If you want to create a responsive website, you might need to use both jQuery and JavaScript.jQuery UI is a curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library. Whether you're building highly interactive web applications or you just need to add a date picker to a form control, jQuery UI is the perfect choice.jQuery is an open-sourced JavaScript library that simplifies creation and navigation of web applications. Specifically, jQuery simplifies HTML Document Object Model (DOM) manipulation, Asynchronous JavaScript and XML (Ajax) and event handling.