Material design component "is not a known element" in Angular2
It should be
<button md-button>foo</button> OR
<button md-raised-button>foo</button>
Sometimes when you add new component to the angular2 it does't directly register the tag in such cases you have to do 2 things:
Go to app.component.ts file
- 1) Insert manually in "import {component}" the button you want to add
- 2) In the @Component register your component and give the path