I learned JavaScript when it was a no-types, no-checking, anything goes toy barely capable of making text blink on a horribly designed MySpace page, which seems to have been its only real reason for being at the time. Thankfully, it’s finally turned into something worthwhile in the meantime. I can see why you find the playgrounds useless–it certainly misled me–but they’re easier to work with than a browser IMO for more than a couple lines.
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