TypeScript第一个Promise程序

 

Promise实例生成以后，可以用then方法分别指定resolved状态和rejected状态的回调函数

let promise = new Promise(function(resolve,reject){
    console.log("Promise create");
    resolve();
});

promise.then(function(){
    console.log('resolved.');
});

console.log("Hi!");

//Promise create
//Hi!
//resolved.

 

function timeout(ms:number) {
    return new Promise((resolve, reject) => {
      setTimeout(resolve, ms, 'done');
    });
  }
  
timeout(1000).then((value) => {
  console.log(value);
});