es6中promise ALL Race Resolve Reject finish的实现
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | function mypromise(func){ this .statue = "pending" ; this .data = null ; this .resolveCallback = []; this .rejectCallback = []; this ._final = null ; var self = this ; var resolve = function (data){ if (data instanceof mypromise) { data.then(resolve,reject) return ; } setTimeout( function (){ if (self.statue != "pending" ) return ; self.data = data; self.statue = "resolve" ; for ( var i = 0; i < self.resolveCallback.length; i++){ var item = self.resolveCallback[i]; item.bind(self)(data) } },0) } var reject = function (data){ setTimeout( function (){ if (self.statue != "pending" ) return ; self.data = data; self.statue = "reject" ; for ( var i = 0; i < self.rejectCallback.length; i++){ var item = self.rejectCallback[i]; item.bind(self)(data) } },0) } try { if ( typeof func == 'function' ){ func.bind( this )(resolve,reject); } else { if (func == 'reject' ){ this .statue = "reject" ; reject(); } else { this .statue = "resolve" ; resolve(); } } } catch (e) { reject(e) } } mypromise.prototype.then = function (onresolve,onreject){ var self = this ; onresolve = typeof onresolve === 'function' ? onresolve : function (data){ return data;} onreject = typeof onreject === 'function' ? onreject : function (data){ return data;} if (self.statue == "pending" ){ return new mypromise( function (resolve,reject){ var _this = this ; self.resolveCallback.push( function (data){ var x = onresolve(data); if (x instanceof mypromise){ x.then(resolve,reject) } else { resolve(x) } typeof _this._final == 'function' ? _this._final() : null ; }) self.rejectCallback.push( function (data){ var x = onreject(data); if (x instanceof mypromise){ x.then(resolve,reject) } else { reject(x) } typeof _this._final == 'function' ? _this._final() : null ; }) }); } if (self.statue == "resolve" ){ return new mypromise( function (resolve,reject){ var x = onresolve(self.data); if (x instanceof mypromise){ x.then(resolve,reject) } else { resolve(x); } typeof this ._final == 'function' ? this ._final() : null ; }); } if (self.statue == "reject" ){ return new mypromise( function (resolve,reject){ var x = onreject(self.data); if (x instanceof mypromise){ x.then(resolve,reject) } else { reject(x); } typeof this ._final == 'function' ? this ._final() : null ; }); } } mypromise.prototype. catch = function (reject){ return this .then( null ,reject); } mypromise.All = function (){ var allArguments = arguments; var len = allArguments.length, item = null , successResult = [], failResult = [] resultData = []; return new mypromise( function (resolve,reject){ function resolver(index){ return function (data){ successResult.push(1); resolveAll(index,data); } } function rejecter(index){ return function (data){ failResult.push(1); resolveAll(index,data); } } function resolveAll(index,data){ resultData.push({index:index,data:data}) if (successResult.length + failResult.length == len){ if ( successResult.length == len){ resolve(resultData) } else { reject(data) } } } for ( var i = 0; i < len; i++){ item = allArguments[i]; if (!(item instanceof mypromise)){ throw new TypeError( "you must pass promise to mypromise.all" ) } item.then(resolver(i),rejecter(i)) } }) } mypromise.Race = function (){ var allArguments = arguments; var len = allArguments.length, item = null , successResult = [], failResult = []; return new mypromise( function (resolve,reject){ function resolver(data){ successResult.push(1); resolveAll(data); } function rejecter(data){ failResult.push(1); reject(data); } function resolveAll(data){ resolve(data) } for ( var i = 0; i < len; i++){ item = allArguments[i]; if (!(item instanceof mypromise)){ throw new TypeError( "you must pass promise to mypromise.all" ) } item.then(resolver,rejecter) } }) } mypromise.Resolve = function (func){ if (func instanceof mypromise){ return func; } else { return new mypromise( 'resolve' ); } } mypromise.Reject = function (func){ return new mypromise( 'reject' ); } mypromise.prototype.Final = function (onresolve){ this ._final = onresolve; } |
分类:
h5
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