node如何实现定时任务

importschedulefrom'node-schedule';
importupdateCodefrom'./controllers/hcpLan/fetch'

constapp=newKoa();

constrouter=newRouter();

router.get('/',(ctx,next)=>{
ctx.body='hello'
});

app.use(router.routes()).use(router.allowedMethods());


letrule=newschedule.RecurrenceRule()
/**每天的凌晨12点更新代码*/
rule.hour=0
rule.minute=0
rule.second=0
/**启动任务*/
schedule.scheduleJob(rule,()=>{
updateCode.cloneRepo();
console.log('代码更新了！');
})

app.listen(3000)

******
┬┬┬┬┬┬
│││││|
│││││└一周的星期(0-7)(0or7isSun)
││││└─────月份(1-12)
│││└──────────月份中的日子(1-31)
││└───────────────小时(0-23)
│└────────────────────分钟(0-59)
└─────────────────────────秒(0-59,OPTIONAL)

varschedule=require('node-schedule');
//当分钟为42时，执行一个c免费云主机、域名ron任务
varj=schedule.scheduleJob('42****',function(){
console.log('执行了!');
});

varschedule=require('node-schedule');
vardate=newDate('2017-09-2622:00:00');

varj=schedule.scheduleJob(date,function(){
console.log('执行了！');
});

varschedule=require('node-schedule');

varrule=newschedule.RecurrenceRule();
rule.minute=42;

varj=schedule.scheduleJob(rule,function(){
console.log('执行了!');
});