Introduction

Generator functions (defined by the function* keyword) run as coroutines, generating a series of values as they’re requested through an iterator.

Syntax

• function* name(parameters) { yield value; return value }
• generator = name(arguments)
• { value, done } = generator.next(value)
• { value, done } = generator.return(value)
• generator.throw(error)

Remarks

Generator functions are a feature introduced as part of the ES 2015 specification and are not available in all browsers. They are also fully supported in Node.js as of v6.0. For a detailed browser compatibility list, see the MDN Documentation, and for Node, see the node.green website.

Generator Functions

Sending Values to Generator

Delegating to other generator

Iteration

Async flow with generators

Iterator-observer interface