Lightning Web Components (LWC)

Introduction : 

Salesforce Lightning Web Components (LWC) is revolutionizing the way applications are built on the Salesforce platform. LWC combines modern web standards such as JavaScript, HTML and CSS with the power of Salesforce to create products that are fast, reusable and effective.

Salesforce Lightning Web Components :

Salesforce Lightning Web Components are custom built using modern web standards and are designed to run natively on the Salesforce platform. This product provides a lightweight, secure and efficient way to build rich customer experiences and interact with data from Salesforce.

Benefits of Salesforce LWC :

Enhanced Performance: 

LWC leverages a highly efficient rendering engine that allows lightning-fast loading and rendering of components. This results in a seamless user experience with reduced latency.


LWC promotes the development of reusable components, making it easier to build complex applications. These components can be easily shared across different Salesforce orgs, enabling teams to collaborate and accelerate development.

Seamless Integration:

LWC seamlessly integrates with other Salesforce features, such as Apex (Salesforce’s proprietary programming language), Lightning Data Service, and the Lightning Base Component library. This integration streamlines development and improves productivity.

Example: Building a Todo List Manager with Salesforce LWC

Let’s dive into a real-world example to understand how LWC works. In this example, we will create a simple Todo List Manager.

Setup : 

Create a new Lightning Web Component using the Salesforce CLI.

Define the necessary HTML, CSS, and JavaScript files for the component.

Component Markup (HTML) :


    <div class=”container”>

        <input type=”text” placeholder=”Add a new task” value={newTask} onchange={handleTaskChange} />

        <button onclick={addTask}>Add Task</button>


            <template for:each={tasks} for:item=”task”>

                <li key={}>{}</li>





Component JavaScript (JS) :

import { LightningElement, track } from ‘lwc’;

export default class TodoList extends LightningElement {

    @track newTask = ”;

    @track tasks = [];

    handleTaskChange(event) {

        this.newTask =;


    addTask() {

        if (this.newTask !== ”) {

            const newTaskObj = {


                name: this.newTask



            this.newTask = ”;




Component Styling (CSS) :

.container {

    display: flex;

    flex-direction: column;

    align-items: center;

    margin: 20px;


ul {

    list-style-type: none;

    padding: 0;


li {

    margin: 5px;



Adding ToDO List :

ToDo List :

Edit The ToDo List :

Conclusion :

Salesforce Lightning Web Components (LWC) offers developers a powerful framework to build lightning-fast, reusable, and efficient components within the Salesforce ecosystem. By leveraging modern web standards, developers can create seamless user experiences and increase productivity. In this blog post, we explored the features of Salesforce LWC and built a real-world example of a Todo List Manager to showcase its capabilities.