Aura versus Lightning Web Components coexistence

Key Takeaway

An Aura component can contain a Lightning web component, but a Lightning web component can't contain an Aura component.

Salesforce has two programming models for custom Lightning components: the original Aura Components model (Aura) and the newer Lightning Web Components model (LWC), which follows modern web standards. The two kinds of components can run side by side in the same app, so an org can add new Lightning web components without throwing away its existing Aura work.

Why Salesforce built LWC

Salesforce built LWC to align with web standards that did not exist when Aura was created. LWC is an implementation of the W3C Web Components standards.

Using web standards means more features run natively in the browser instead of through a JavaScript framework. Lightning web components also perform better and are easier to develop than Aura components.

Platform App Builder Study Guide

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Demonstrate the capabilities and use cases for custom buttons, links, and actions.

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Given a scenario, determine the declarative options available for incorporating Lightning components in an application.

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Describe the programmatic customizations available for incorporating custom Lightning components in an application.

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When a custom Lightning component is required

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Aura versus Lightning Web Components coexistence

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Exposing custom Lightning components to App Builder

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Design attributes on custom Lightning components

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Lightning component overrides for standard actions

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Lightning web component record actions

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Custom Lightning components on Flow screens

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Visualforce pages in Lightning Experience

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Given a set of requirements, determine the appropriate global, object-specific actions and layouts to optimize the Salesforce mobile user experience.

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Aura versus Lightning Web Components coexistence

Key Takeaway

An Aura component can contain a Lightning web component, but a Lightning web component can't contain an Aura component.

Why Salesforce built LWC

Salesforce built LWC to align with web standards that did not exist when Aura was created. LWC is an implementation of the W3C Web Components standards.