题解 | #倒计时#

function second(second) {
  return {
	day: parseInt(second / (3600 * 24)),
	hour: parseInt(second % (3600 * 24) / 3600),
	min: parseInt(second % (3600 * 24) % 3600 / 60),
	second: second % (3600 * 24) % 3600 % 60
  }
}

function render(data) {
  Object.keys(data).forEach(key => {
	if (data[key] < 10) {
	  data[key] = '0' + data[key]
	}
  })
  let { day, hour, min, second } = data

  if (day == '00') {
	jsCountdown.innerHTML = `
	<span class="hide">${day}天</span>
	<span>${hour}:</span>
	<span>${min}:</span>
	<span>${second}</span>`
  } else {
	jsCountdown.innerHTML = `
	<span>${day}天</span>
	<span>${hour}:</span>
	<span>${min}:</span>
	<span>${second}</span>`
  }
}