What is the difference between Salesforce Lightning and LWC?

Salesforce Lightning and LWC: In the ever-evolving landscape of customer relationship management (CRM) systems, Salesforce remains a trailblazer. With its powerful suite of tools, Salesforce empowers businesses to streamline their processes and enhance customer interactions. Two prominent components within the Salesforce ecosystem that often raise questions among users are Salesforce Lightning and Lightning Web Components (LWC). In this blog post, we’ll delve into the intricacies of these technologies, exploring their differences, similarities, and use cases.

Salesforce Lightning Overview:

Salesforce Lightning is a comprehensive framework designed to offer a more dynamic and responsive user experience within the Salesforce environment. Introduced in 2015, Lightning replaced the classic Salesforce user interface, bringing a modern, component-based architecture to the forefront. This framework comprises various tools and services, including Lightning Components, App Builder, and more, enabling users to build intuitive, customizable interfaces for their Salesforce applications.

Key Features of Salesforce Lightning:

  1. Lightning Components: These are reusable building blocks that facilitate the creation of dynamic and interactive user interfaces. Developers can use pre-built components or create custom ones to meet specific business requirements.
  2. App Builder: An intuitive drag-and-drop interface that allows users to design and customize the layout of their Salesforce applications. It simplifies the process of creating pages with Lightning Components.
  3. Lightning Experience: The Lightning Experience is the modern user interface for Salesforce, providing a more visually appealing and user-friendly environment compared to the classic UI.

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Lightning Web Components (LWC) Overview:

Introduced in 2019, Lightning Web Components (LWC) represent a significant evolution in Salesforce’s approach to building user interfaces. LWC is a lightweight and modular framework based on web standards, such as JavaScript and HTML. It is designed to facilitate faster development and better performance, offering developers a more modern and efficient way to create Salesforce applications.

Key Features of Lightning Web Components:

  1. Web Standards: LWC utilizes standard web technologies like JavaScript and HTML, making it easier for developers to leverage their existing skills and knowledge.
  2. Lightweight and Modular: LWC promotes a modular architecture, allowing developers to build components that are both lightweight and easily maintainable. This contributes to improved performance and scalability.
  3. Event-Driven Architecture: LWC follows an event-driven model, enabling seamless communication between components. This ensures a more responsive and interactive user experience.

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Comparison Table of  Salesforce Lightning and LWC

Feature Salesforce Lightning Lightning Web Components (LWC)
Introduction Year 2015 2019
Architecture Aura (Component-Based) Web Standards (JavaScript and HTML)
Development Model Component-Based Lightweight and Modular
User Interface Lightning Experience (Modern UI) Customizable UI with a focus on performance
Development Learning Curve Moderate Relatively Easy
Communication Between Components Event-Based Event-Driven Architecture
Reusability Components can be reused in different apps Promotes the creation of reusable components
Performance Good, but can be affected by the Aura framework Improved performance due to modular architecture
Integration with Third-Party Libraries Can be challenging Easier integration with standard JavaScript libraries


  1. Is Salesforce Lightning being phased out in favor of Lightning Web Components?
    • No, Salesforce Lightning is not being phased out. Lightning Web Components coexist with Salesforce Lightning and offer a more modern development approach. Both can be used depending on the specific requirements of a project.
  2. Can Lightning Web Components be used in classic Salesforce?
    • LWC is primarily designed for use in the Lightning Experience. However, there are ways to make Lightning Web Components work in the classic UI using tools like Lightning Out.
  3. Do I need to learn a new programming language for Lightning Web Components?
    • LWC is based on web standards such as JavaScript and HTML, making it more accessible to developers who are already familiar with these technologies.


In conclusion, both Salesforce Lightning and Lightning Web Components play crucial roles in enhancing the Salesforce user experience. While Salesforce Lightning provides a robust framework for building dynamic interfaces, Lightning Web Components offer a more modern, lightweight, and efficient approach. The choice between the two depends on the specific needs of your project and your development preferences. As Salesforce continues to evolve, staying informed about these technologies will empower you to make the most out of the Salesforce ecosystem.

External Links:

  1. Salesforce Lightning Overview
  2. Lightning Web Components Documentation