What is jQuery + Pros and Cons

Client-side web development has constantly undergone fundamental changes, but perhaps no tool revolutionized how developers interact with browsers in the early 21st century as much as jQuery. Before this library emerged, developers faced the major challenge of cross-browser incompatibility and the need to write long, repetitive lines of vanilla JavaScript code to implement even the simplest page operations, such as selecting an element or handling a click event

Introduced in 2006, jQuery quickly gained unprecedented popularity as a lightweight, fast, and cross-browser library, with the primary goal of simplifying client-side scripting in HTML . It became the most widely used JavaScript library globally, thanks to its famous motto: “Write less, do more” . Its ability to abstract DOM complexities, manage animations, and facilitate AJAX communications made web pages powerful and dynamic 

However, in the current web ecosystem, dominated by powerful frameworks like React, Vue, and Angular, the question arises: Is jQuery still a valuable tool, and is learning it essential for today’s developers? This article provides a comprehensive tutorial on working with jQuery syntax, analytically examines its pros and cons against modern technologies, and clarifies its real position in contemporary web development. A precise analysis of this topic will illuminate the learning path for beginners and the architectural choices for specialists.

What is jQuery? Understanding the Technical Standing

jQuery is a free and open-source library for the JavaScript language . It is crucial to understand that jQuery is not a new programming language or a comprehensive framework; it is merely a library, or an API (Application Programming Interface), written on top of JavaScript . This distinction is vital: jQuery does not replace anything, but rather makes using JavaScript easier for front-end development .

jQuery’s main function is described as providing an abstraction layer . This layer condenses many capabilities that required writing numerous lines of code in vanilla JavaScript into short functions. These functions allow developers to execute complex operations, such as AJAX calls or extensive DOM manipulations, with just a single line of code .

The ($) symbol in jQuery is an alias for the jQuery() function and acts as the gateway to access all of the library’s features . Generally, jQuery’s syntax is designed to simplify document traversal, animation creation, and the development of Ajax-based applications .

Step-by-Step jQuery Syntax: Setup and Basic Structure

To start working with jQuery, you must first add its library file to the HTML page. This is usually done via a CDN (Content Delivery Network) or a local download. jQuery code, like vanilla JavaScript, must be placed within <script> tags .

Core Structure and DOM Preparation

All jQuery commands follow a simple pattern: $(selector).action().

• The ($) symbol: The jQuery alias.
• selector: The selector for the element or a set of elements (such as a CSS class, ID, or HTML tag).
• action(): The method to be executed on the selected element (such as click, hide, or fadeIn).

One of the most essential commands in jQuery is the $(document).ready() event . This method ensures that your jQuery code executes only after the Document Object Model (DOM) is fully loaded and the page structure is ready . Premature execution of DOM manipulation code can lead to errors, so this method guarantees safe execution :

<script>
$(document).ready(function(){
    // Your jQuery code executes here
    alert("Hello World!");
});
</script>

<script>
$(document).ready(function(){
    // Your jQuery code executes here
    alert("Hello World!");
});
</script>

 Comparing jQuery Syntax vs. Vanilla JavaScript

A comparison of the syntax of these two technologies clearly shows how jQuery reduces lines of code and improves readability, which is one of the main reasons for its historical popularity .

Comparison of Coding Simplicity: jQuery vs. Vanilla JavaScript

The Power of jQuery in DOM Manipulation and Event Handling

One of the most important aspects of jQuery is its capability to manipulate the Document Object Model (DOM) . The DOM refers to the standard HTML page interpreted by the browser. jQuery provides powerful methods for getting, modifying, and adding HTML elements and attributes

Retrieving and Setting Content

For working with element content, jQuery provides the following key methods:

• .text(): To retrieve or set the content inside an HTML element as plain text “.
• .html(): To retrieve or set the content, including the element’s internal HTML tags “.
• .val() (short for value): To retrieve or set the content within form elements, such as input fields (input) . Furthermore, to work with element attributes, the `.attr()` method is used, which easily retrieves or sets the desired Attribute name (e.g., `href` or `src`) .

Changing Structure and Managing Events

jQuery also allows the creation of new HTML elements in memory and their insertion into the loaded DOM document . For instance, you can create a paragraph tag and a link within it, and then use methods like appendTo() to add it to the document body .

In addition to structure manipulation, Event Handling is also optimized in jQuery. Events are all the things that happen in a web page that we can respond to, including mouse movement, clicking, or pressing keyboard keys . jQuery has an equivalent method for every common DOM event. For example, to attach a handler function to the click event on all paragraph tags, the following syntax is used: `$("p").click(function(){ // action goes here!! });`

Another key feature is Chaining . This allows developers to execute multiple methods sequentially on a selected element (such as hiding, adding a class, and animating) without needing to reselect the element each time. This significantly enhances code readability and shortens code lines . Moreover, jQuery has strong support for AJAX, enabling interaction with the server and loading data without needing to reload the entire page .

Key Advantages of Using jQuery: Reasons for Historical Popularity

For decades, jQuery was known as the most popular JavaScript library in web development, a popularity owed to significant advantages:

1. Extensive Cross-Browser Compatibility: This is jQuery’s most significant historical achievement. In the past, browser incompatibilities (especially between Microsoft products and others) were a nightmare for developers. jQuery automatically managed these inconsistencies, ensuring that code ran identically across all browsers (even IE6). This resulted in massive savings in developer time.

2. Simple Syntax and Reduced Code Lines: jQuery made using JavaScript simple, intuitive, and appealing. The motto “Write less, do more” meant that an operation that required 30 lines of code in vanilla JavaScript could be executed in just 5 lines in jQuery . John Resig, the creator of jQuery, understood this and believed that: “Writing Javascript code should be fun.” jQuery achieved this goal by summarizing repetitive tasks, resulting in short, smart, and understandable code “.

3. Rich Plugin Ecosystem and Active Community : jQuery has a large and active community of developers . Its ecosystem, featuring thousands of free and open-source plugins, including various attractive sliders, diverse element effects, and advanced search bars (autocomplete), made it possible to add complex features with just a few clicks .

4. Simplicity in Learning and Flexibility: jQuery is a high-level library with a simple syntax, making it easy for beginners to learn . This simplicity makes it highly flexible for quickly adding interactive features to dynamic websites, especially when combined with Content Management Systems (CMS).

Drawbacks and Alternatives in the Modern Web Ecosystem

While jQuery was once an industry standard, the emergence of new JavaScript standards and modern frameworks has highlighted its weaknesses.

1. Overhead and File Size: One of the most important challenges is the necessity of loading the jQuery library file. This adds overhead to the page’s total size, which can reduce initial loading speed. Although compressed and minified versions of the library are lightweight (around 30 to 80 KB) , this overhead is considered unnecessary in projects that require only a few simple DOM operations “.

2. Performance Compared to Vanilla JS: Technically, vanilla JavaScript is faster at direct DOM manipulation and querying. This difference is due to jQuery adding an abstraction layer that affects DOM search speed . While this difference is negligible in small, everyday operations, using Vanilla JS is more efficient in projects with heavy operations or intensive loops .

3. Obsolescence in Modern Architectures: Today, component-based frameworks like React, Vue.js, and Angular are jQuery’s biggest competitors . These frameworks use approaches such as the Virtual DOM, which not only increase project scalability and maintainability but also solve problems like complex state management . In such environments, the need for jQuery for DOM manipulation virtually disappears. Todd Motto, a prominent developer, describes jQuery's status as: **"To me jQuery is/was like the BlackBerry of 'smart phones'. It was once dominant, but that's quickly fizzling out."**

Comprehensive Review of jQuery Library Pros and Cons

This table summarizes the analysis of jQuery’s advantages and disadvantages for an informed decision:

Comprehensive Review of jQuery Library Pros and Cons

Faral Tech’s Analytical Perspective: The Future of jQuery in Modern Stacks

Leading technology companies like Faral Tech, which focus on developing startups, platform products (such as Eryx PaaS), and advanced content management systems (like Farapy CMS with Python and AI technology) , generally adopt a strategic approach to front-end technology stack selection. While no direct information is available regarding Faral Tech's specific view on jQuery , an analytical stance can be inferred given their activities and the presence of front-end developers on their team “.

Projects developed by companies with a modern approach require high scalability, component-based architecture, and complex state management on the client side . In these situations, modern JavaScript frameworks like React, Vue.js, and Angular (often recommended for modern stacks like MERN and MEVN ) emerge as standard solutions . These frameworks address the issues jQuery originally intended to simplify (such as DOM manipulation) in a more efficient and organized manner (Virtual DOM) .

Strategic Inference:

1. Legacy Projects and Maintenance: Faral Tech would likely still justify using jQuery for maintaining or extending legacy projects or traditional CMS systems that rely on jQuery plugins “. In this domain, the simplicity and speed of executing simple jQuery operations still hold an advantage.
2. New Scalable Projects: For Faral Tech‘s new startups and products that require high performance and dynamic state management (such as the PaaS user interface or the AI-enabled CMS), the emphasis should be on component-based frameworks “. Using jQuery as the backbone in these projects would not be recommended due to performance overhead and complexity in state management .

Faral Tech’s Suggestion (Based on Analysis):

“jQuery is an excellent tool for simplicity and maintenance, but for startups aiming for rapid scalability and high efficiency in 2025, investment should be focused on component-based frameworks like React or Vue. jQuery can be used as a light auxiliary tool for adding interactions to static pages or as a quick solution for short-lived projects, not as the backbone of a large-scale application.”

Conclusion: Is jQuery Still Valuable in 2025?

The analysis of jQuery’s position shows that the library is not entirely obsolete; rather, its role has shifted. Although its creator, John Resig, admits he no longer uses jQuery in large teams and has moved to technologies like React , jQuery is still utilized by major tech companies such as IBM, Google, and Microsoft in certain parts of their projects . Furthermore, according to the Stack Overflow survey, it remains one of the most widely used web frameworks “.

Final Recommendation:

If a developer’s goal is to work on legacy projects, WordPress-based websites, or simple CMSs that only require adding minor and quick interactions, jQuery is a powerful and easy choice. Its simplicity in learning and rapid use makes it an excellent starting point for beginners .

However, for developing Single Page Applications (SPAs), scalable applications, or projects where performance is critical, investing in mastering vanilla JavaScript and then modern frameworks (React/Vue/Angular) is essential. Ultimately, jQuery is not a dead technology but a tool with a more specialized application that should be chosen with full awareness of its advantages in development speed and its drawbacks in performance overhead.

Frequently Asked Questions (FAQ)