Simplify the customization process for Embedded Service using HTML or modern
JavaScript with Lightning Web Components. Aura Components are still available but
less flexible or try multiple components on your web page with Lightning
Out.
As of Spring ’19 (API version 45.0), you
can build Lightning components using two programming models: the Lightning
Web Components model, and the original Aura Components model. Lightning web
components are custom HTML elements built using HTML and modern JavaScript.
Lightning web components and Aura components can coexist and interoperate on
a page.