generators.md

Generators are a new feature in ECMAScript 6. Using a generator, you can interrupt the execution of a function, and communicate between the function and other elements in your script.

In the following example, we create two instances of the *foo generator. The yield expression pauses execution and sends something back. The next method (outside the generator) has the generator restart, going on to the next yield, or to completion.

function *foo() {
    yield 1;
    yield 2;
    yield 3;
    yield 4;
    yield 5;
}

var it = new foo();

var test = new foo();

it.next().value;//1
it.next().value;//2
it.next().value;//3
it.next().value;//4
it.next().value;//5

test.next().value;//1
test.next().value;//2
test.next().value;//3
test.next().value;//4
test.next().value;//5