函数防抖和截流 ​

export default {
  /**
   * fun防抖
   * 指定时间后触发
   */
  debounce(fun, wait = 1000) {
    let timer
    return function() {
      const context = this
      const args = arguments
      if (timer) clearTimeout(timer)
      timer = setTimeout(() => {
        fun.apply(context, args)
      }, wait)
    }
  },

  /**
   * fun截流
   * 指定时间内不再触发
   */
  throttle(fun, wait = 1000) {
    let timer
    return function() {
      if (timer != null) return
      const context = this
      const args = arguments
      fun.apply(context, args)
      timer = setTimeout(() => {
        timer = null
      }, wait)
    }
  }
}

export default {
  /**
   * fun防抖
   * 指定时间后触发
   */
  debounce(fun, wait = 1000) {
    let timer
    return function() {
      const context = this
      const args = arguments
      if (timer) clearTimeout(timer)
      timer = setTimeout(() => {
        fun.apply(context, args)
      }, wait)
    }
  },

  /**
   * fun截流
   * 指定时间内不再触发
   */
  throttle(fun, wait = 1000) {
    let timer
    return function() {
      if (timer != null) return
      const context = this
      const args = arguments
      fun.apply(context, args)
      timer = setTimeout(() => {
        timer = null
      }, wait)
    }
  }
}