text: window.addEventListener('load', start)
  
  const clickArray = []
  
  function start() {
    const button = document.querySelector('#clickButton')
    button.addEventListener('click', handleButtonClick)
  }
  
  function handleButtonClick() {
    const item = getNewTimestamp()
    clickArray.push(item)
    render(item)
  }
  
  function render(item) {
    const ul = document.querySelector('#data')
  
    const li = document.createElement('li')
    li.textContent = item
  
    ul.appendChild(li)
  
    document.title = clickArray.length
  }
  