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bakari-promise

v0.0.3

Published

bakari promise module

Downloads

1

Readme

bakari-promise

##About

bakari-promise是bakari框架中的承诺模块。

##Install

通过npm安装bakari-promise。

npm install bakari-promise

##Usage

引入bakari-promise:

var Promise = require('bakari-promise');

创建并解决一个承诺:

// 创建一个承诺
var promise = Promise();

// 承诺完成后回掉函数
promise.done(function(){
	alert('done!');
});

promise.resolve(); // alert 'done!'

##Method

done(fn) : 设置承诺解决后的回调函数。

fail(fn) : 设置承诺拒绝后的回调函数。

always(fn) : 设置承诺处理后的回调函数,无论承诺被解决或拒绝都会执行这个函数。

then(doneFn, failFn) : 同时设置承诺解决及拒绝后的回调函数。

resolve : 解决一个承诺。

reject : 拒绝一个承诺。

##传入参数

你可以为承诺传入参数,像这样:

var promise = Promise();

promise.done(function( name ){
	alert(name);
});

promise.resolve('jim'); // alert 'jim';

##承诺的状态

你可以访问承诺的status属性来获取当前承诺的状态。

状态包括:

  • pending : 尚未完成
  • resolved : 已解决
  • rejected : 已拒绝
  • resolving : 正在解决
  • rejecting : 正在拒绝

像这样访问:

var promise = Promise();
alert(promise.status); // alert 'pending'

##立即执行承诺

当承诺已经被处理,设置的回调函数将立即被执行:

var promise = Promise();

promise.reject();

promise.fail(function(){
	alert('fail!');
});

// alert 'fail!';

##回调函数队列

你可以访问承诺的callback属性来获取,回掉函数队列。