“LWC vs. React: An In-Depth Comparison of Component-Based UI Frameworks”

In the ever-evolving realm of web development, where innovation constantly pushes the boundaries of what can be achieved, two front-end frameworks have emerged as leaders in their own right. Lightning Web Components (LWC), originating from Salesforce, and React, which is famous frontend library used by many Full Stack developers ,born out of Facebook’s creativity, may appear to be distinct players in the web development landscape.

However, as we delve deeper into their structures and functionalities, we’ll find that beneath the surface, these frameworks share a rich array of similarities that bridge the gap between them. Both LWC and React embrace the principles of component-based architecture, prioritize the importance of reusability, and empower developers to craft dynamic and interactive user interfaces using JavaScript.

In this blog, we’ll explore the technical differences and similarities between LWC and React .

1. Lifecycle Methods


In Lightning Web Components, the connectedCallback method plays an important role in component initialization. This method is invoked when a component is inserted into the DOM. Developers often use it for tasks like setting up initial state, making API calls, or configuring event listeners. It’s the starting point for many LWC components.


React, too, provides a mechanism for component initialization and side effects through the useEffect hook. This hook is essential for function components and allows developers to perform tasks such as data fetching and resource management. The cleanup function in useEffect ensures that resources are properly released.

2. Dependency Management

LWC: @wire Decorator

Lightning Web Components use a declarative approach to manage dependencies with the @wire decorator. This decorator enables data binding, ensuring that components automatically refresh when the data they rely on changes. It’s a powerful tool for building reactive user interfaces.

React: useEffect Dependencies

React’s useEffect hook allows fine-grained control over when an effect should run by specifying dependencies. This means you can explicitly define which variables or props trigger the effect when they change. It offers flexibility in managing side effects and updates.

3. Component Communication

LWC: Properties and Events

LWC relies on properties and events for component communication. Properties are used to pass data from parent to child components, this is possible with the help of  @api decorator, while events are employed to communicate changes from child to parent components. This structured approach ensures clear data flow within LWC applications.

React: Props, Callbacks, and Context

React uses props for passing data from parent to child components. For child-to-parent or sibling communication, callback functions or the context API can be utilized. This flexibility allows for versatile and efficient component communication.

4. Reactivity Model

LWC: Reactive Programming

Lightning Web Components follow a reactive programming model. Properties marked with the @track decorator are automatically observed, triggering UI updates when these properties change. It simplifies reactivity management within LWC components.

React: Virtual DOM and Reconciliation

React’s reactivity is achieved through a virtual DOM and a reconciliation algorithm. When state or props change, React efficiently updates the UI by minimizing direct DOM manipulation. This approach optimizes performance and ensures a responsive user experience.

5. Framework Specificity

LWC: Salesforce Integration

It’s essential to note that Lightning Web Components are tightly integrated with the Salesforce platform. They are primarily designed for building applications within Salesforce CRM, making them an ideal choice for Salesforce developers.

React: General-Purpose Library

In contrast, React is a general-purpose library that can be applied in a wide range of web development scenarios. It is not tied to any specific platform, offering versatility for various projects and use cases.

6. Templating and JSX

LWC: Template-Driven Approach

Lightning Web Components embrace a template-driven approach. Developers define the component’s structure and behavior in an HTML-like template file, making it easy for those familiar with HTML.

React: JSX Syntax

React, on the other hand, employs JSX syntax, which allows developers to write component structures in a more JavaScript-centric manner. JSX combines HTML-like elements with JavaScript, offering a powerful and expressive way to create components.

7. State Management

LWC: @track vs. Reactive Properties

LWC uses the @track decorator to make properties reactive. This means when a property marked with @track changes, the component re-renders automatically. It’s a declarative approach to state management.

React: useState Hook

React uses the useState hook to manage component-level state. Developers can define and modify state variables within functional components, and React handles the re-rendering when state changes.


In conclusion, both Lightning Web Components (LWC) and React are powerful tools for web development, each with its own strengths and design philosophies. The choice between them should consider project requirements and the familiarity of the development team. Understanding their differences in component lifecycle and data management is crucial to making an informed decision for your next web development endeavor.