Make a callback- or promise-based function support both promises and callbacks.
Uses the native promise implementation.
npm install universalifyTakes a callback-based function to universalify, and returns the universalified function.
Function 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 three or more arguments, and does not ensure that the callback is only called once.
functioncallbackFn(n,cb){setTimeout(()=>cb(null,n),15)}constfn=universalify.fromCallback(callbackFn)// Works with Promises:fn('Hello World!').then(result=>console.log(result))// -> Hello World!.catch(error=>console.error(error))// Works with Callbacks:fn('Hi!',(error,result)=>{if(error)returnconsole.error(error)console.log(result)// -> Hi!})Takes a promise-based function to universalify, and returns the universalified function.
Function must return a valid JS promise. universalify does not ensure that a valid promise is returned.
functionpromiseFn(n){returnnewPromise(resolve=>{setTimeout(()=>resolve(n),15)})}constfn=universalify.fromPromise(promiseFn)// Works with Promises:fn('Hello World!').then(result=>console.log(result))// -> Hello World!.catch(error=>console.error(error))// Works with Callbacks:fn('Hi!',(error,result)=>{if(error)returnconsole.error(error)console.log(result)// -> Hi!})MIT