For what it's worth, there are tools that can help you avoid the bad parts. JSLint won't let you forget a "var" or "===" ... and if you use CoffeeScript, it's n

For what it's worth, there are tools that can help you avoid the bad parts. JSLint won't let you forget a "var" or "===" ... and if you use CoffeeScript, it's not possible to forget "var" or "===", because there aren't any.