//模拟网络请求任务 const timeout = (time) => { return new Promise((resolve) => { setTimeout(() => { resolve("time is:" + time); }, time); }); }; const scheduler = new Scheduler(); const addTask = (time, order) => { return new Promise((resolve, reject) => { Promise.resolve(scheduler.add(() => timeout(time))).then( resolve, reject ); }); }; Promise.all([ addTask(1000, "1"), addTask(500, "2"), addTask(300, "3"), addTask(400, "4"), ]).then((res) => { console.log(res); });