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/home/yanggyein/yanggyein/yang_home/node_modules/call-me-maybe/README.md
# call-me-maybe [](https://travis-ci.org/limulus/call-me-maybe) Let your JS API users either give you a callback or receive a promise. ## Usage ```javascript var maybe = require("call-me-maybe") module.exports = function asyncFunc (cb) { return maybe(cb, new Promise(function(resolve, reject) { // ... })) } ``` ## API ### maybe(cb, promise) If the callback `cb` is truthy, returns `undefined` and will call `cb` when `promise` is settled. The parameters passed to `cb` are standard error-first: - If `promise` is fulfilled, then it is called with the result of the promise: `cb(null, result)` - If `promise` is rejected, then it is called with the rejection error: `cb(err)` If `cb` is falsey, then `promise` is retuned.