4.8.2 for…of Statement

The for...of statement creates a loop iterating over iterable objects, including:

• built-in String,
• Array,
• array-like objects (e.g., arguments or NodeList),
• TypedArray,
• Map,
• Set, and
• user-defined iterables.

It invokes a custom iteration hook with statements to be executed for the value of each distinct property of the object.

for (const [key, value] of iterable) ...

In for...of loops, abrupt iteration termination can be caused by break, throw or return. In these cases, the iterator is closed.

You can also iterate over generators, i.e. functions generating an iterable object.