Add support for the clearMarks method
JohnRiv opened this issue · comments
https://www.w3.org/TR/user-timing/#dom-performance-clearmarks
If we call clearMarks without an argument, then it should still maintain the marks we recommend setting up in the <head> of the document: 'pageStart', 'loadEventEnd', and 'firstPaintFrame'.
If you specify one of those 3 marks as the argument, then we'll delete it, but that's on you 😉
Closed via #58