@microsoft/sp-application-base package

Provides access to the client-side application that is currently running.

The component context for BaseApplicationCustomizer.

This is the base class that third parties should extend when implementing a client-side extension that runs when an application is first starting.

Represents custom content that is rendered inside a placeholder on a SharePoint page.

Allows third-party components to discover and use SharePoint placeholders. Placeholders enable third-party components to render custom content into designated regions on the page.

Options for the PlaceholderProvider.tryCreateContent() method.

The identifier for a content placeholder, which is a region on the page where third-party extensibility components can render custom content.