promise-preserve

  

Preserve the result in a promise chain.

Install

``sh
npm install --save promise-preserve
`

Usage

`js
var preserve = require('promise-preserve');

var promise = new Promise(function(resolve, reject) {
resolve('Hello world!');
});

promise.then(preserve(function(result) {
console.log(result); // prints 'Hello world!';
return 'foobar';
}).then(function(result) {
// prints 'Hello world!'; as promise-preserve preserved the value of the
// promise chain
console.log(result);
return 'foobar';
}).then(function(result) {
// prints 'foobar' as the previous function did not preserve the result
console.log(result);
});
``

API

$3

Wraps the function so that when it is called, it does not modify the result in
a promise chain.

$3

Wraps the method so that when it is called, it will be called with the right
context and it will not change the result in a promise chain.