standard

Iterator helpers

A set of ECMAScript methods on Iterator.prototype, including map, filter, take, drop, flatMap and toArray, that chain over any iterator and produce values on demand.

Known aliases

Iterator.prototype helpers

Relationships

No evidence-backed relationships are recorded.

Current clusters

build1 publisher

Staying lazy until the sort cuts a chain's 80,000-object peak to about 2,000

TC39's iterator helpers are Baseline as of September 2026, so lazy chains run without a polyfill from Chrome 122 and Node 22 upward, while the teams reporting the 40-60% memory saving attached to them are unnamed.

Publishers:dev.to

Reality

Evidence42
Adoption48
Hype gap+34
Incentives38
Confidence55