function MyPromise(fun) {	let self = this;	self.then = function (resolve, error) {		resolve&&resolve(self.value);		error&&error(self.errValue);		return this;	}	function resolve (value) {		self.value = value;	}	function error (value) {		self.errValue = value;	}	fun(resolve, error);}function test () {	return new MyPromise(function(resolve,error){		resolve("我是个正确值");		error('我是个错误值');	});}test().then(function(result){	console.info('result = ', result)}).then(function(result){	console.info('result = ', result)});