What is jQuery?

jQuery is a JavaScript library that was developed to make simple the process of traversing and manipulating HTML DOM tree as well as handling of events, CSS animation, and Ajax. jQuery is a free, and open-source software that makes use of the permissive MIT License. As of May 2019, jQuery is estimated to be used by over 73% of the 10 million most popular websites available. Web analysis shows that jQuery is the most widely deployed JavaScript library by a very large margin, having about 3 to 4 times more usage than any other JavaScript library.

The syntax of jQuery is designed to make it simpler to travel down an HTML document, select DOM elements, handle events, create animations, and develop Ajax applications. jQuery also offers web developers the ability to create their own plug-ins on top of the JavaScript library. This allows software developers to create various abstractions for low-level interaction and animation, high-level effects and advanced, themeable widgets. The modular method to the jQuery library allows for the creation of very powerful and dynamic web pages and Web applications.

The collection of jQuery core features and functions like the selections of DOM elements, navigation and manipulation, enabled by its selector engine, devised a new "style of programming", fusing algorithms and DOM data structures. This technique inspired the architecture of other JavaScript web frameworks like Dojo and YUI v3, later its stimulates the development of the standard Selectors API. Next, this style has been further improved with a better algorithm-data union in an heir of jQuery, which is the D3.js framework.

Nokia and Microsoft package jQuery on their platforms. Microsoft also incorporates jQuery into their Visual Studio to be used within Microsoft's ASP.NET, ASP.NET AJAX, and other MVC frameworks while Nokia has added it into the Web Run-Time widget development platform.

Features of jQuery

There are many features of the jQuery library and some of them are:

1. DOM manipulation: jQuery makes it very easy to select DOM elements, go through them and modify their content by using a cross-browser open source selector engine known as Sizzle.

2. Event handling: jQuery presents web developers with an elegant way to obtain and capture a wide variety of events, such as tracking the user clicks on a link, without the need to fill up the HTML document with unnecessary code together with event handlers.

3. AJAX Support: The jQuery library helps developers to build a responsive and feature-rich web site using AJAX technology.

4. Animations: jQuery comes with lots of built-in animation effects with which web developers can use on websites.

5. Lightweight: jQuery is a very lightweight library with its minified and gzipped files at about 19KB in size.

6. Cross Browser Support: The jQuery library has cross-browser support, this means that it works on all known browser implementations.

7. Latest Technology: jQuery supports CSS3 selectors together with basic XPath syntax.

Benefits of learning jQuery

There are many benefits of learning jQuery and some of them are:

1. jQuery is a widely used javascript library so, you would never be lost in any development-related problem you encounter.

2. jQuery promotes simplicity.

3. jQuery is compatible across all browsers.

4. jQuery has a clean and beautiful syntax.

5. jQuery is both lightweight and lean.

6. jQuery is an open-source library.

7. jQuery is highly extensible.

8. Web pages developed with jQuery loads faster.

9. jQuery is SEO-friendly.


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