JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/3.9.1/chart.min.js"></script>

<canvas id="line-chart"></canvas>
<div>
  <input type="button" value="Show Set 2" onclick="restoreLayer2()">
  <input type="button" value="Hide Set 2" onclick="removeLayer2()">
</div>
<script>
 lineChart = new Chart(document.getElementById("line-chart"), {
        type: 'line',
        data: {
          labels: [
            '10:00 AM',
            '11:00 AM',
            '12:00 PM',
            '1:00 PM',
            '2:00 PM',
            '3:00 PM',

            '4:00 PM',
            '5:00 PM',
            '6:00 PM',
            '7:00 PM',
            '8:00 PM',
            '9:00 PM'
          ],
          datasets: [{
            label: 'Temperature',
            data: [
              74,
              77,
              80,
              82,
              86,
              85,

              83,
              79,
              72,
              68,
              66,
              66
            ],
          }, {
            label: 'Humidity',
            data: [
              44,
              44,
              45,
              45,
              45,
              46,

              46,
              46,
              45,
              44,
              44,
              44
            ],
          }],
        },
       options: {
         plugins: {
           legend: {
             display: false
           }
         }
       }
    });

   function restoreLayer2(){
				console.log(lineChart.getDataVisibility(1));
        
				lineChart.setDatasetVisibility(1, true);
        //lineChart.toggleDataVisibility(1);
        
        //lineChart.setDatasetVisibility(1, !lineChart.getDataVisibility(1));
				lineChart.update();
    }

    function removeLayer2() {
				console.log(lineChart.getDataVisibility(1));
        
        //
        
        lineChart.toggleDataVisibility(1);
        lineChart.setDatasetVisibility(1, lineChart.getDataVisibility(1));
        
       ...