Promise It makes generation of promises easier and with much less code by providing simplified API for converting callback-based async functions to promises using the great Q module.
How many times you have this pattern inside your code?
function someFunc() {
var defer = Q.defer();
...
call.something(function(err, data) {
if (err) throw err;
defer.resolve(data);
})
return defer.promise;
}with Promise It it's much easier:
function someFunc() {
return promiseIt(callSomething, ['foo', 3], this).spread(function(str) {
console.log(str); // '3 foo'
});
}
function callSomething(str, num, callback) {
setTimeout(function() {
callback(num + ' ' + str);
}, 1000);
}$ npm install promise-itCalls the given function (with provided params and context) and returns a promise until the callback is called.
Calls array of functions (with provided params and context) and returns one promise that will resolve once all given functions were resolved.
The MIT License (MIT)
Copyright (c) 2014 Ran Mizrahi ran@cocycles.com
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.