JS节流、防抖

节流就是「技能冷却中」

const 闪现 = ()=>{
  console.log('闪现');
}


const throttle = (fn, time) =>{
  let 冷却中 = false

  return (...args)=>{
    if(冷却中){
      return
    }
    fn(...args)
    冷却中 = true

    setTimeout(()=>{
      冷却中 = false
    }, time)
  }
}

// 优化
const throttle2 = (fn, time) =>{
  let timer = null

  return (...args)=>{
    if(timer){
      return
    }
    fn(...args)

    timer = setTimeout(()=>{
      timer = null
    }, time)
  }
}



const xx = throttle(闪现, 10 * 1000)

防抖就是「回城被打断」

const debounce = (fn, time) => {
  let 回城计时器 = null
  return (...args) => {
    if (回城计时器 !== null) {
      clearTimeout(回城计时器) // 打断回城
    }
    // 重新回城
    回城计时器 = setTimeout(() => {
      fn.call(undefined, ...args) // 回城后调用 fn
      回城计时器 = null
    }, time)
  }
}