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promisify-call\n\n[![npm version](https://img.shields.io/npm/v/promisify-call.svg?style=flat-square)](https://www.npmjs.com/package/promisify-call)\n[![build status](https://img.shields.io/travis/bojand/promisify-call/master.svg?style=flat-square)](https://travis-ci.org/bojand/promisify-call)\n\nPromisify a function call so users can call a function with a callback or get a promise.\n* **2.0** works only with native `Promise` so requires Node >= 4.0.\n* **1.0** uses [Bluebird](www.bluebirdjs.com) and should work with older Node.js\n\n## Installation\n\n`npm install promisify-call`\n\n## Usage\n\n```js\nfunction _uppercase(param, fn) {\n setTimeout(() => {\n return fn(null, param.toUpperCase());\n }, 50);\n}\n\nfunction uppercase(param, fn) {\n return promisifyCall(this, _uppercase, ...arguments);\n}\n\n// now we can call it using callback-style\nuppercase('foo', (err, res) => {\n console.log(res); // FOO\n});\n\n// OR promise style\nconst res = await uppercase('foo');\nconsole.log(res); // FOO\n```\n\n## API Reference\n\n\n\n### promisifyCall(ctx, fn, args) ⇒ undefined | \\* | Promise\nPromisifies the call to fn if appropriate given the arguments.\nCalls the function fn either using callback style if last argument is a function.\nIf last argument is not a function, fn is called returning a promise.\nThis lets you create API that can be called in either fashions.\n\n**Kind**: global function \n**Returns**: undefined | \\* | Promise - Promise if promisified \n\n| Param | Type | Description |\n| --- | --- | --- |\n| ctx | Object | context / this |\n| fn | function | The function to call |\n| args | arguments | Arguments |\n\n## License\n\nCopyright 2015 Bojan D.\n\nLicensed under the MIT License.\n","_attachments":{},"homepage":"https://github.com/bojand/promisify-call#readme","bugs":{"url":"https://github.com/bojand/promisify-call/issues"},"license":"MIT"}