防抖-节流

function logName() {
  console.log(Date.now() + ' name')
}
function logAge() {
  console.log(Date.now() + ' age')
}

let throttleLastFireTimes = []
function throttle(delay = 500, func) {
  return (function (index) {
    return function () {
      let now = Date.now()
      if (
        !throttleLastFireTimes[index] ||
        now - throttleLastFireTimes[index] > delay
      ) {
        throttleLastFireTimes[index] = now
        func && func()
      }
    }
  })(throttleLastFireTimes.length)
}

let logNameThrottle = throttle(500, logName)
logNameThrottle()
setTimeout(() => {
  logNameThrottle()
}, 200)
setTimeout(() => {
  logNameThrottle()
}, 600)

let logAgeThrottle = throttle(500, logAge)
logAgeThrottle()
setTimeout(() => {
  logAgeThrottle()
}, 200)
setTimeout(() => {
  logAgeThrottle()
}, 600)