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  "readme": "# universalify\n\n[![Travis branch](https://img.shields.io/travis/RyanZim/universalify/master.svg)](https://travis-ci.org/RyanZim/universalify)\n\nMake a callback- or promise-based function support both promises and callbacks.\n\nUses the native promise implementation.\n\n## Installation\n\n```bash\nnpm install universalify\n```\n\n## API\n\n### `universalify.fromCallback(fn)`\n\nTakes a callback-based function to universalify, and returns the universalified  function.\n\nFunction must take a callback as the last parameter that will be called with the signature `(error, result)`. `universalify` does not support calling the callback with more than three arguments, and does not ensure that the callback is only called once.\n\n```js\nfunction callbackFn (n, cb) {\n  setTimeout(() => cb(null, n), 15)\n}\n\nconst fn = universalify.fromCallback(callbackFn)\n\n// Works with Promises:\nfn('Hello World!')\n.then(result => console.log(result)) // -> Hello World!\n.catch(error => console.error(error))\n\n// Works with Callbacks:\nfn('Hi!', (error, result) => {\n  if (error) return console.error(error)\n  console.log(result)\n  // -> Hi!\n})\n```\n\n### `universalify.fromPromise(fn)`\n\nTakes a promise-based function to universalify, and returns the universalified  function.\n\nFunction must return a valid JS promise. `universalify` does not ensure that a valid promise is returned.\n\n```js\nfunction promiseFn (n) {\n  return new Promise(resolve => {\n    setTimeout(() => resolve(n), 15)\n  })\n}\n\nconst fn = universalify.fromPromise(promiseFn)\n\n// Works with Promises:\nfn('Hello World!')\n.then(result => console.log(result)) // -> Hello World!\n.catch(error => console.error(error))\n\n// Works with Callbacks:\nfn('Hi!', (error, result) => {\n  if (error) return console.error(error)\n  console.log(result)\n  // -> Hi!\n})\n```\n\n## License\n\nMIT\n",
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