is-generator-function [![Version Badge][2]][1]

December 29, 2025 ยท View on GitHub

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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