Show/Hide Tooltip

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script nonce="undefined" src="https://cdn.zingchart.com/zingchart.min.js"></script>
  <style>
    html,
    body {
      height: 100%;
      width: 100%;
      margin: 0;
      padding: 0;
    }

    #myChart {
      height: 400px;
      width: 100%;
      min-height: 150px;
    }

    .zc-ref {
      display: none;
    }
  </style>
</head>

<body>
  <button class='btn btn-info' id='demo1'>Show Tooltip</button>
  <button class='btn btn-info' id='demo2'>Hide Tooltip</button>
  <div id="myChart"><a class="zc-ref" href="https://www.zingchart.com">Powered by ZingChart</a></div>
  <script>
    ZC.LICENSE = ["569d52cefae586f634c54f86dc99e6a9", "b55b025e438fa8a98e32482b5f768ff5"];
    var myConfig = {
      type: 'line',
      tooltip: {

      },
      series: [{
        values: [35, 42, 67, 89, 25, 34, 67, 85]
      }]
    };

    zingchart.render({
      id: 'myChart',
      data: myConfig,
      height: 400,
      width: '100%'
    });

    document.getElementById('demo1').addEventListener('click', function() {
      zingchart.exec('myChart', 'showtooltip', {
        plotindex: 0,
        nodeindex: 3
      });
    });

    document.getElementById('demo2').addEventListener('click', function() {
      zingchart.exec('myChart', 'hidetooltip');
    });
  </script>
</body>

</html>

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>

  <script src="https://cdn.zingchart.com/zingchart.min.js"></script>
</head>

<body>
  <button class='btn btn-info' id='demo1'>Show Tooltip</button>
  <button class='btn btn-info' id='demo2'>Hide Tooltip</button>
  <div id="myChart"><a class="zc-ref" href="https://www.zingchart.com">Powered by ZingChart</a></div>
</body>

</html>

html,
body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
}

#myChart {
  height: 400px;
  width: 100%;
  min-height: 150px;
}

.zc-ref {
  display: none;
}

var myConfig = {
  type: 'line',
  tooltip: {

  },
  series: [{
    values: [35, 42, 67, 89, 25, 34, 67, 85]
  }]
};

zingchart.render({
  id: 'myChart',
  data: myConfig,
  height: 400,
  width: '100%'
});

document.getElementById('demo1').addEventListener('click', function() {
  zingchart.exec('myChart', 'showtooltip', {
    plotindex: 0,
    nodeindex: 3
  });
});

document.getElementById('demo2').addEventListener('click', function() {
  zingchart.exec('myChart', 'hidetooltip');
});