Limited Availability Iterators

Iterator includes()

The includes() method of an Iterator object returns true when an item yielded by the iterator is the same as a given value. It's similar to the includes() method of arrays.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Sep 24, 2026.

Desktop Browser Engine Support

Google Chrome

154

Supported

Mozilla Firefox

154

Supported

Apple Safari

—

Unsupported

Microsoft Edge

154

Supported

Mobile Browser Engine Support

Chrome Android

154

Firefox Android

154

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

javascript.builtins.Iterator.includes ↗