In Web Development, The Angular is a SPA (Single Page Application) framework, and a view is made of one or more component.
To create a new workspace and initial starter app, Run the CLI command ng new and provide the name new-app, as shown here
As the name suggests, Angular CLI happens to be a command-line tool meant for angular applications.
Angular framework uses Typescript & HTML to build Apps. The Angular itself is written using the Typescript.
In React JS, Ref is an attribute which makes it possible to store a reference to particular DOM nodes or React elements.