Next

jQuery Get Started

jQuery is a fast, small, and feature-rich JavaScript library that simplifies the process of HTML document traversal, event handling, animation, and Ajax interactions. It works across a multitude of browsers and is designed to make scripting easier for developers.

Key Topics

What is jQuery?

jQuery is a JavaScript library that simplifies tasks such as selecting HTML elements, handling events, and creating animations. It provides a concise and readable way to perform complex JavaScript operations and works seamlessly across different browsers.

How to Use jQuery

To use jQuery, include the library in your HTML file. This can be done by linking to a CDN or downloading the library locally. After including jQuery, you can start writing jQuery code inside the <script> tag.

Example: Including jQuery


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery Example</title>
    <!-- Include jQuery from CDN -->
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <!-- Content -->
    <h1 id="greeting">Hello, World!</h1>
    <button id="changeGreeting">Change Greeting</button>

    <!-- jQuery Script -->
    <script>
        $(document).ready(function() {
            $("#changeGreeting").click(function() {
                $("#greeting").text("Welcome to jQuery!");
            });
        });
    </script>
</body>
</html>

Explanation: This example demonstrates how to include jQuery in an HTML file and use it to interact with elements. When the button with id="changeGreeting" is clicked, the text of the h1 element with id="greeting" is updated using the .text() method.

Key Features of jQuery

  • DOM Manipulation: Easily select and modify HTML elements using a powerful selector syntax.
  • Event Handling: Attach event handlers to elements and respond to user interactions efficiently.
  • Animations: Create visually appealing effects with built-in animation methods.
  • Ajax Support: Simplify asynchronous HTTP requests with the $.ajax method.
  • Plugins: Extend functionality by creating or using a vast collection of third-party plugins.
  • Cross-Browser Compatibility: Write code that works seamlessly across different browsers.

Key Takeaways

  • Simple Inclusion: jQuery can be included using a CDN or a local file.
  • Browser Compatibility: jQuery works across multiple browsers, simplifying cross-browser issues.
  • Concise Syntax: jQuery provides a concise way to perform complex JavaScript tasks.
  • Event Handling: Easily handle events like button clicks or mouse movements using jQuery methods.
Next