Questions tagged [es6-generator]

Javascript generators are special functions, which can be paused with the keyword yield, which can be used to establish a 2-way communication between the generator and its caller.

Generator function declaration:

function *myGenerator(params) {/*...*/}

The star (*) character before myGenerator() above means that the function is a generator.

Generator function expression:

const myGenerator = function *(params) {/*...*/}

When using a function expression to create a generator the star (*) between the function keyword and the opening parenthesis above means that the function is generator.

We can assign the function to a variable, but this is not starting the function, anything passed as a parameter will be ignored:

var myExecutor = myGenerator();

myExecutor is an iterable, which steps through the generator, stopping at each yield.

myExecutor.it(someparams)

resumes the generator from the last yield where it stopped previously (or the start of the function) and it executes the function until the next yield, or, in the case when there is no next yield, until the end of the function.