Look, I don't disagree that Javascript itself creates some of the problems in its ecosystem, but complaining about 8 whole extra keystrokes to support IE9 doesn't really help.
So what - every language has places with extra verbosity, unfortunate function names, or other minor annoyances. The correct solution to this type of problem is either 1) just type it the compatible way and move on to a real problem, or 2) use an editor macro such as TextMate's snippet[1] feature or the emacs variant yasnippet[2]. Code templates have been a solved problem for a long time.
And whatever JS includes or doesn't include, he should use ONE bloody library, like Lodash to fill in the gaps, instead of some micro-monstrosity like "left-pad".