url(s) to the css file.
Optional
timeout: numberTime to wait for the file to be loaded (optional).
A cancelable promise resolving the css file(s).
Loads a css file and returns a Promise to support waiting for the load.
Optional
timeout: numberTime to wait for the file to be loaded (optional).
A cancelable promise resolving the css file(s).
Loads a css file and returns a Promise to support waiting for the load.