Free jQuery Courses

jQuery is a speedy and reliable JavaScript library. It simplifies the traversing of the HTML document, event handling, animating, and AJAX interactions for rapid web development.

jQuery is a lightweight JavaScript library that supports cross-platform. jQuery signifies “write less, do more.” It simplifies AJAX operations with the help of an API that provides ease of use to work on various browsers. It also allows DOM manipulation. It is also known as the feature-rich library. jQuery is also used for animation.

Features of jQuery include:

• HTML Manipulation
• DOM Manipulation
• DOM element selection
• CSS Manipulation
• Effects and Animations
• Utilities
• AJAX Techniques
• HTML event methods
• JSON Parsing
• Extensibility through plug-ins

jQuery provides the following advantages:

• jQuery helps in improving the performance of an application.
• It is faster and extensible.
• Developers can complete their UI design with fewer lines of code.
• Using jQuery, you can develop compatible browser applications.
• jQuery mainly uses new features of new browsers.

jQuery is considered one of the most popular frameworks of JavaScript, which is adapted by many reputed companies like Google, Microsoft, IBM, Netflix, etc. The core features supported by jQuery are:

• Lightweight: jQuery is a lightweight library that is minified and zipped.

• Event Handling: jQuery handles a large variety of events correctly and elegantly.

• DOM Manipulation: Working with DOM is made more accessible by jQuery. It is easy to select the DOM elements with the help of jQuery. You can also negotiate and modify their content with the help of Sizzle, a cross-browser open source selector engine.

• Cross-Browser Support: jQuery is a framework that provides cross-browser support and works fine with most browsers.

• AJAX Support: With the help of jQuery, you can build feature-rich and responsive web applications using AJAX techniques.

• Animations: jQuery has come up with plenty of built-in animation effects that you can add to your websites.

jQuery is accessed through the following two methods:

• Local Installation: You can install jQuery libraries on your local machine and include them in your HTML code.

• CDN Based Version: Through CDN (Content Delivery Network), you can directly add the jQuery library to your HTML code.

You can use multiple libraries without conflicting with one another with the help of the noConflict jQuery feature. As jQuery is the framework of Javascript, you can use all the functions and other elements of JavaScript.

• Numbers: Numbers in JavaScript are immutable and are double-precision 64-bit format IEEE 754 values. For example, 6000, 78.2, 0.005.

• String: A string in Javascript is immutable that contains one, none, or many characters. For example, “jQuery,” ‘Hi! It is a “jQuery” string’.

• Boolean: Boolean in JavaScript provides you with values like true or false. The number zero and an empty string by default are set to false.

• Objects: Objects can be created using object literals like var in JavaScript.

• Functions: You can have named or anonymous functions in JavaScript, which is specified using the function keyword.

• Scope: A variable scope can be defined as the region until which it is valid. There are two scopes, namely:

Global variables - a variable has a global scope and is defined throughout the JavaScript code.

Local variables: are defined only for that function, and its parameters are also local to that function.

You can select elements randomly or in a sequential method using various DOM traversal methods offered by a powerful tool like jQuery. It is seen that most of the jQuery objects remain unmodified by DOM traversal methods, and based on the given conditions, they filter out elements from a document.

There are more interesting concepts of jQuery which you should know for better development of the website. If you plan to learn from jQuery online courses, you can get into Great Learning’s jQuery Free Courses and get hold of jQuery certificates for free.