function*

function – Declares a generator.

Description

function ([mixed param, …])

Parameters

Changelog

Examples

Example #1 – function* example

Run
function* keyGen () {
	var key = 0;
	while (true) {
		yield key++;
	}
}

var key = keyGen();

console.log(key.next());  // Object {value: 0, done: false}
console.log(key.next());  // Object {value: 1, done: false}
console.log(key.next());  // Object {value: 2, done: false}

console.log(key.next().value);  // 3

Example #2 – function* example

Run
function* range (start, end) {
	while (start < end) {
		yield start;
		start += 1;
	}
}

for (var i of range(0, 5)) {
	console.log(i);
}

See also

• yield

External references

• Mozilla: function* statement