Should one use for-of or forEach when iterating through an array? [duplicate]

I recommend to always use for … of in ES6.

• It works on any iterable
• It supports all kinds of control flow in the loop body, like continue, break, return, yield and await.

Also I personally find it more readable, but that comes down to preference. Some people think forEach is a more functional style, but that’s wrong – it has no result value and is all about doing side effects, so an imperative-looking loop fits that purpose better.

Performance is not a concern, in modern engines all loop styles are equivalent.