t.getElementsByClassName('interactive')[2]

      btn1.addEventListener('mouseover', function() {
        btn1.classList.add('mouseover')
      })

      btn2.addEventListener('mouseenter', function() {
        btn2.classList.add('mouseenter')
      })

      btn3.addEventListener('mousedown', function() {
        btn3.classList.add('mousedown')
      })

      const both = document.getElementsByClassName('both')[0]

      both.addEventListener('mouseover', function() {
        both.classList.add('mouseover