一、最low的定时器: 每次执行完间隔5s,然后继续执行
(function schedule() {
setTimeout(do_it, 5000, schedule);
}());
function do_it(callback) {
var times = new Date();
console.log(times.getSeconds());
callback();
};
二、逼格高一点使用插件 node-schedule
安装:npm install node-schedule
1、确定时间,例如:2012年11月21日,5:30
var schedule = require('node-schedule');
var date = new Date(2012, 11, 21, 5, 30, 0);
var j = schedule.scheduleJob(date, function(){
console.log('The world is going to end today.');
});
j.cancel(); //取消预设计划
2、每小时的固定分钟,例如:每个小时的42分钟
var schedule = require('node-schedule');
var rule = new schedule.RecurrenceRule();
rule.minute = 42;
var j = schedule.scheduleJob(rule, function(){
console.log('The answer to life, the universe, and everything!');
});
3、一个星期中的某些天的某个时刻,例如:每周四,周五,周六,周天的17点
var rule = new schedule.RecurrenceRule();
rule.dayOfWeek = [0, new schedule.Range(4, 6)];
rule.hour = 17;
rule.minute = 0;
var j = schedule.scheduleJob(rule, function(){
console.log('Today is recognized by Rebecca Black!');
});
4、每秒执行
var rule = new schedule.RecurrenceRule();
var times = [];
for(var i=1; i<60; i++){
times.push(i);
}
rule.second = times;
var c=0;
var j = schedule.scheduleJob(rule, function(){
c++;
console.log(c);
});
原文链接: https://www.cnblogs.com/xbblogs/p/5788907.html
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