is-generator-function

What is is-generator-function?

The is-generator-function package is a utility that allows you to check if a given function is a generator function. This can be particularly useful when working with code that dynamically generates functions or when integrating with libraries that may use generator functions for asynchronous control flow.

What are is-generator-function's main functionalities?

Check if a function is a generator function

This feature allows you to distinguish between regular JavaScript functions and generator functions. By passing a function to `isGeneratorFunction`, it returns `true` if the function is a generator function and `false` otherwise. This can be useful for dynamic function handling or when working with APIs that may provide generator functions.

const isGeneratorFunction = require('is-generator-function');

function* myGenerator() {}
const regularFunction = function() {};

console.log(isGeneratorFunction(myGenerator)); // true
console.log(isGeneratorFunction(regularFunction)); // false

Other packages similar to is-generator-function

is-generator

Similar to is-generator-function, is-generator checks if a given value is a generator object, which is different from checking if a function is a generator function. It's useful for identifying generator objects, but not for identifying generator functions directly.

is-function

While is-function is more general and checks if a given value is a function, it does not specifically differentiate between regular functions and generator functions. It's broader in scope compared to is-generator-function, which is specifically designed to identify generator functions.

README

is-generator-function

Is this a native generator function?

Example

var isGeneratorFunction = require('is-generator-function');
assert(!isGeneratorFunction(function () {}));
assert(!isGeneratorFunction(null));
assert(isGeneratorFunction(function* () { yield 42; return Infinity; }));

Tests

Simply clone the repo, npm install, and run npm test

Changelog

v1.0.7 - 2017-12-27

Fixed

• [Tests] run tests with uglify-register #16
• Exclude testling.html from npm package. #8

Commits

• [Tests] up to node v8.4; use nvm install-latest-npm to ensure new npm doesn’t break old node; remove osx builds 365004b
• [Tests] up to node v9.2, v8.9, v6.12; pin included builds to LTS 33916ea
• [Dev Deps] update core-js, eslint, nsp b4ce014
• [Dev Deps] update eslint, @ljharb/eslint-config, core-js, nsp, semver, tape e4b499f
• [Tests] up to node v7.4, v4.7 ce642b6
• Only apps should have lockfiles. ea4dfb1
• [Tests] on node v9.3 307d9c1
• fix: example code missing ) after argument list 05f62c7
• [Tests] update uglify-register 7376bec
• [Dev Deps] update eslint c3f5895