https://angular.io/

For the benefit of developers who are not familiar with Angular, I would like to present the following:

The HTML and CSS are contained in Angular Components:

• spa/src/app/nested-css-grids-1

Angular Component Architecture:

• .html - contains HTML
• .css | .scss | .less - contains CSS
• .ts - contains TypeScript code for the component

app.component = Angular "magic"

• this is the main component and is embedded into index.html at run-time
• this is where components and routing is added to the application.
• "router-outlet" element - Angular's SPA placeholder