Golang模拟Js中setTimeout与setInterval函数

通过Golang语言模拟javascript中的定时器

在开发中有个场景需要实现js中防抖和节流的效果，但是防抖和节流在js中依赖于setTimeot函数。文末放有链接通过 setTimeout实现防抖和节流的效果

setTimeout函数

context.CancelFunc
func SetTimeout(timeout int, f func()) context.CancelFunc {
	ctx, cancelFunc := context.WithCancel(context.Background())
	go func() {
		select {
		case <-ctx.Done():
		case <-time.After(time.Duration(timeout) * time.Second):
			f()
		}
	}()
	return cancelFunc
}

setInterval函数

context.CancelFunc
func SetInterval(timeout int, f func()) context.CancelFunc {
	ctx, cancelFunc := context.WithCancel(context.Background())
	go func() {
		for {
			time.Sleep(time.Duration(timeout) * time.Second)
			select {
			case <-ctx.Done():
				return
			default:
				f()
			}
		}
	}()
	return cancelFunc
}

测试案例

package main

import (
	"context"
	"fmt"
	"os"
	"time"
)

func main() {
	SetTimeout(func() {
		fmt.Println("SetTimeout")
	}, 5)

	interval := SetInterval(func() {
		fmt.Println("SetInterval")
	}, 2)
	time.Sleep(5 * time.Second)
	interval()
	time.Sleep(10 * time.Second)
}

func SetTimeout(timeout int, f func()) context.CancelFunc {
	ctx, cancelFunc := context.WithCancel(context.Background())
	go func() {
		select {
		case <-ctx.Done():
		case <-time.After(time.Duration(timeout) * time.Second):
			f()
		}
	}()
	return cancelFunc
}

func SetInterval(timeout int, f func()) context.CancelFunc {
	ctx, cancelFunc := context.WithCancel(context.Background())
	go func() {
		for {
			time.Sleep(time.Duration(timeout) * time.Second)
			select {
			case <-ctx.Done():
				return
			default:
				f()
			}
		}
	}()
	return cancelFunc
}

相关链接