Why does Angular not need a dash in component name

Question

I wondered why Polymer elements need a dash in custom elements name like while this is not necessary for Angular components especially as A

Answer 1

The dash is not required by Angular since there is no technical reason to require it. However, all large projects I have worked on prefix all components and directives with a two character and then dash prefix, e.g "ab-tab".

First, using dashes in names makes your syntax compatible with the Custom Elements standard, although Angular doesn't depending the spec.

Second, it helps with organization. Standard Angular directives are all prefixed with 'ng-'. By using your own prefix, people reading your code will be able to quickly distinguish between components from different libraries.