Valve/lie

A basic but performanent promise implementation.

lie

[](https://travis-ci.org/calvinmetcalf/lie)

lie a small, performant, promise library implementing the Promises/A+ spec Version 1.1.

A originally a fork of Ruben Verborgh's library called promiscuous, version 2.6 and above are forked from ayepromise by Chris Burgmer.

npm install lie

var Promise = require('lie');

Usage

Either use it with browserify (recomended) or grab one of the files from the dist folder

• lie.js/lie.min.js makes 'Promise' available in global scope (or since it's a UMD Promise will be availble through a CJS or AMD loader if it's available instead)
• lie.noConflict.js/lie.noConflict.min.js makes 'Lie' availble in global scope, otherwise they the same as lie.js/lie.min.js
• lie.polyfill.js/lie.polyfill.min.js adds 'Promise' to the global scope only if it's not already defined (not a UMD).

API

Impliments the standard ES6 api,

new Promise(function(resolve, reject){
    doSomething(function(err, result) {
        if (err) {
            reject(err);
        } else {
            resolve(result);
        }
    });
}).then(function (value) {
    //on success
}, function (reason) {
    //on error
}).catch(function (reason) {
    //short cut for error handling
});

Promise.all([
    //array of promises or values
]).then(function ([/* array of results */]));

Promise.race([
    //array of promises or values
]);
// either resolve or rejects depending on the first value to do so