What is the difference between JavaScript’s `apply` and `call` methods?

General Discussions
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I’ve been working with JavaScript for over a decade now, and one thing that still confuses many devs early on is the difference between call and apply. At their core, both let you invoke a function and set its this context — super useful for borrowing methods or controlling context.

Now, here’s the key difference in the javascript apply vs.call discussion:

  • call takes arguments one by one: func.call(thisArg, arg1, arg2, ...)
  • apply takes arguments as an array: func.apply(thisArg, [arg1, arg2, ...])

So if you already have your arguments in an array, apply just saves you that little extra step.