Your Angular app may need to allow users add text with formatting options, images, tables, appearance styles and/or links. This is a cinch with Kendo UI for Angular Editor. Take a look at an example project.
The easy way to bring drag-and-drop power to our Angular app is using the Kendo UI for Angular Drag and Drop component. We can even build a scrum board!
Accessibility as described in the WCAG actually makes your site better for everyone. Just doing the right thing, leveraging HTML5, and using a good third-party toolkit will get you most of the way there.