pwrap

Add promise capability to any function.

Installation

npm install --save pwrap

Why?

Write

var myFunc = pwrap(function(resolve, reject) {
  // do stuff
})

instead of writing

var myFunc = function() {
  return new Promise(function(resolve, reject) {
    // do stuff
  })
}

and it only takes 800 bytes.

Usage

When you pwrap a function, you gain the ability to add resolve and reject as parameters, and the function will return a promise.

Important Note: pwrap requires you to bring your own promise implementation or have them natively.

// Use default promise or whatever Promise is set to
var pwrap = require('pwrap')();

// Use bluebird
var pwrap = require('pwrap')(require('bluebird'));

Real example:

var pwrap = require('pwrap')();

var timeoutPromise = pwrap(function(str, ms, resolve, reject) {
  setTimeout(function() {
    resolve(str);
  }, ms);
});

// Logs after 1s
timeoutPromise('One second has passed!', 1000).then(function(result) {
  console.log(result);
});

License

MIT