title="Promises/A+ 1.0 compliant" align="right" />

YAPI.js 

yet another Promises/A+ implementation

Usage

You can use two ways to create a promsie.

$3

Use YAPI.createPromsie method.
``javascript
var promise = YAPI.createPromise(function (resolve, reject) {
// if promise is fulfilled
resolve();

// or if promise is rejected
reject();
});

promise.then(function () {
// fulfilled callback
}, function () {
// rejected callback
});
`
Here is an example of a simple XHR2 wrapper written using YAPI.js:
`javascript
var getJSON = function(url) {
var promise = YAPI.createPromise(function(resolve, reject){
var client = new XMLHttpRequest();
client.open("GET", url);
client.onreadystatechange = handler;
client.responseType = "json";
client.setRequestHeader("Accept", "application/json");
client.send();

function handler() {
if (this.readyState === this.DONE) {
if (this.status === 200) { resolve(this.response); }
else { reject(this); }
}
};
});

return promise;
};
`
Check the example.html for a full demo which uses the about XHR2 wrapper.

$3


Manualy create a deferred object and resolve/reject it ondemand.
`javascript
var getUserInfo = function () {
var deferred = YAPI.defer();

// fetch user information throught AJAX
deferred.resolve(); // if AJAX request succeed
// or
deferred.reject(); // if something wrong

return deferred.promise;
};
`

Todos

- [ ] refine readme
- [ ] add usage information
- [x] add Promise/A+ logo after pass Promises/A+ Compliance Test Suite
- [x] provide minimized version
- [ ] provide YAPI.all` method
- [x] test against Promises/A+ Compliance Test Suite