This is a shadowed H1
Beware, this example that shows CSS encapsulation, will not work if your browser does not support natively the Shadow DOM and HTML templates. The Polyfill does not emulate this feature!
The CSS in the template, that says that all H1s should be white on red, does not affect the H1 that is in the body of the document.
This is sdfsdfsfda text header
Normal header with no shadow DOM associated.
