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What is the difference between Array.function and Array.prototype.function?

I've found that some functions like concat() push() every() both exist in Array and Array.prototype(with firefox 57.0.1 console)

It's confusing since prototype methods exist in Array.
Additionally, where does staic method(Array.from(), Array.isArray() etc) exists in?

enter image description here

I think I've understood concepts of javascript prototype to some extent, so what I'm curious about is why prototype methods(concat() push() ...) apear both in Array and Array.prototype

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  • My firefox also shows Array.isArray with Object.getOwnPropertyName(Array) however does not show with just console.log(Array) How about you? Commented Dec 7, 2017 at 9:30
  • @soonoo Likewise, it doesn't appear in the console.log output, but it does appear in the object inspector pane. Perhaps it's a bug in the console? Commented Dec 7, 2017 at 9:37
  • Thanks but still confused ᅲᅲ Commented Dec 7, 2017 at 9:49
  • @soonoo what's the confusion? Commented Dec 7, 2017 at 9:55
  • it's not your answer, just about firefox's non-general behavior Commented Dec 7, 2017 at 10:01

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