text: function stopwatch() {
      let time=document.getElementById("time")
      let startBtn=document.getElementById("startBtn")
      let stopBtn=document.getElementById("stopBtn")
      let interval;
      startBtn.addEventListener("click" , (e) => {
          time.textContent=`00:00`
          interval=setInterval(function() {
              let [mins , secs]=time.textContent.split(":")
              startBtn.setAttribute("disabled" , true)
              stopBtn.removeAttribute("disabled")
              mins=Number(mins)
              secs=Number(secs)
              secs++
              if(secs > 59) {
                  mins++
                  secs=0
              }
              secs < 10? secs=`0${secs}` : secs
              mins < 10? mins=`0${mins}` : mins
              time.textContent=`${mins}:${secs}`
          } , 1000)
      })
      stopBtn.addEventListener("click" , (e)=> {
          e.target.setAttribute("disabled" , true)
          startBtn.removeAttribute("disabled")
          clearInterval(interval)
      })
  }