[Musings]
今天在连江县，所谓的一县两省，台湾和福建省，都有居民，在这吃了很多海鲜，还喝酒了，中午和晚上都喝了点，实在是酒量不行，困得要死，影响了今天的进度。先写一版吧，迭代估计得明天再来了
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| type State = "pending" | "fulfilled" | "rejected";
class PromiseI {
private state: State;
private fnList: Map<string, Function>;
constructor(executer: (acc, rej) => void) {
executer(this.resolve.bind(this), this.reject.bind(this))
}
resolve(val: string) {
this.state = "fulfilled";
console.log("this is resolve:",val);
}
reject(val: string) {
this.state = "rejected";
console.log("this is reject:",val);
}
then(fn:Function) {
fn();
}
}
let p = new PromiseI(
(resolve,reject)=>{
resolve("test");
}
)
p.then(()=>{
console.log("here is callback then")
})
|