Custom Labels in Lightning Web Components

Custom Labels in Lightning Web Components

On June 4, 2024, Posted by , In Salesforce, With Comments Off on Custom Labels in Lightning Web Components
Custom Labels in Lightning Web Components
Custom Labels in Lightning Web Components

Table of Contents

What are Custom Labels in LWC?

Custom Labels in Lightning Web Components (LWC) are a mechanism for managing text values and translations outside of the component’s JavaScript code. They provide a way to store text values in a central location, making it easier to maintain and update them across multiple components or even across different orgs. Custom Labels are particularly useful for managing user-facing text, such as labels, error messages, and tooltips, and for supporting multilingual applications.

By using Custom Labels, developers can ensure consistency in the application’s language and messaging, as well as streamline the localization process. For example, a developer might use a Custom Label called “error_message” to store a generic error message that can be reused across various components within an LWC application.

This allows them to easily update the error message in one central location without having to search through and modify multiple instances of the message in the codebase.

Custom Labels In Lightning Web Component(LWC)

To illustrate the use of Custom Labels in Lightning Web Components (LWC), let’s consider an example where we want to display a greeting message in multiple languages.

Step 1:

Create Custom Labels in Salesforce In Salesforce, navigate to Setup and search for “Custom Labels” in the Quick Find box. Create a new Custom Label called “greeting_message” and add translations for different languages, such as English, Spanish, and French.

Step 2:

Create the LWC Now, let’s create the Lightning Web Component to display the greeting message based on the user’s language preference. Create a new LWC called “GreetingMessage”.

<!-- greetingMessage.html -->
// greetingMessage.js
import { LightningElement } from 'lwc';
import greetingLabel from '@salesforce/label/c.greeting_message';

export default class GreetingMessage extends LightningElement {
    greeting = greetingLabel;

Step 3:

Deploy and Test Deploy the LWC to your Salesforce org and include it in a Lightning page or app where you want to display the greeting message. When users view the page, the LWC will dynamically fetch the greeting message based on their language preference set in Salesforce.

<!-- greetingMessageMeta.xml -->
<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="" fqn="greetingMessage">

Now, when users view the Lightning page containing the “GreetingMessage” component, they will see the greeting message in their preferred language based on the translations defined in the Custom Labels. This example demonstrates how Custom Labels in LWC enable developers to build multilingual applications easily while maintaining a centralized repository for managing text values.

Advanced Use Cases

Custom Labels in Lightning Web Components (LWC) offer versatile functionalities beyond basic text management. Two advanced use cases include Dynamic Language Switching and Incorporating Variables in Labels.

Dynamic Language Switching

Dynamic Language Switching enables LWCs to display content in different languages based on user preferences or system settings. By leveraging Custom Labels and Salesforce’s multilingual support, developers can create a seamless experience for users worldwide.

Step 1: Configure Multilingual Custom Labels

Begin by defining Custom Labels for each language supported by the application. Salesforce Setup allows for easy management of translations, ensuring consistency across the platform.

Step 2: Implement Language Detection

Utilize Salesforce’s built-in functionality or custom logic to detect the user’s preferred language. This detection can occur at login, based on browser settings, or through user preferences.

Step 3: Dynamically Retrieve Labels

In the LWC, fetch the appropriate Custom Label based on the detected language. This dynamic retrieval ensures that users see content in their preferred language without manual intervention.

Incorporating Variables in Labels

Incorporating Variables in Labels enhances flexibility and customization within LWCs. This feature enables dynamic insertion of values into text strings, allowing for personalized messaging and context-aware content.

Step 1: Define Custom Labels with Variables

Create Custom Labels containing placeholders for variables. These placeholders serve as markers for dynamic content insertion.

Step 2: Pass Variables from LWC

Within the LWC, pass variables as parameters when retrieving Custom Labels. These variables may include user-specific data, record details, or application state.

Step 3: Replace Variables in Labels

Incorporate JavaScript logic to replace placeholders with actual values retrieved from LWC attributes or external sources. This dynamic substitution ensures that labels reflect real-time information.

Importance of Custom Labels in LWC

Custom Labels play a crucial role in Lightning Web Components (LWC) development, offering several benefits that contribute to efficient and scalable application design.

Centralized Text Management

Custom Labels provide a centralized repository for managing text values used throughout LWCs. By consolidating text strings into Custom Labels, developers can easily locate, update, and maintain them without having to search through the entire codebase. This centralized approach enhances code readability and maintainability, streamlining the development process.

Support for Multilingual Applications

Custom Labels facilitate the creation of multilingual applications in LWCs. Salesforce allows developers to define translations for Custom Labels, enabling the application to display text in different languages based on user preferences or system settings. This built-in multilingual support ensures a consistent user experience across diverse linguistic backgrounds, enhancing accessibility and usability.

Enhanced Customization and Localization

Incorporating Custom Labels in LWCs enables developers to tailor the application’s text content to specific user segments or regions. By defining custom labels with variable placeholders, developers can dynamically insert user-specific data or contextual information into text strings. This level of customization enhances user engagement and personalization, making the application more relevant to individual users or target audiences.

Simplified Maintenance and Updates

Custom Labels facilitate seamless maintenance and updates in LWCs. When text values need to be modified or updated, developers can make changes directly within the Salesforce Setup interface, without requiring code changes or deployments. This agility accelerates the update process, reducing downtime and minimizing the risk of errors. Additionally, because Custom Labels are metadata components, they can be easily migrated between environments using Salesforce’s deployment tools, ensuring consistency across development, testing, and production environments.

Compliance with Best Practices

Utilizing Custom Labels aligns with best practices in LWC development and Salesforce platform governance. By following established conventions and leveraging platform features like Custom Labels, developers can adhere to industry standards and ensure the scalability, maintainability, and reliability of their applications. Custom Labels also promote collaboration among development teams, as they provide a standardized approach to managing text content and promoting consistent terminology and messaging across the organization.


In conclusion, Custom Labels play a pivotal role in Lightning Web Components development, offering a range of benefits that contribute to efficient, scalable, and user-friendly applications. By centralizing text management, supporting multilingual capabilities, enhancing customization and localization, simplifying maintenance and updates, and promoting compliance with best practices, Custom Labels empower developers to create robust and engaging experiences for users while adhering to established standards and conventions.

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