History methods

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>
  <script nonce="undefined" src="//www.zingchart.com/scripts/zcDocs.js"></script>
  <link href='//www.zingchart.com/css/zcDocs.css' rel='stylesheet' type='text/css'>
  <script nonce="undefined" src="https://cdn.zingchart.com/zingchart.min.js"></script>
  <style>
    html,
    body {
      height: 100%;
      width: 100%;
    }
  </style>
</head>

<body>
  <div id='myChart'></div>
  <button class='btn btn-info' id='back'>Go Back in History</button>
  <button class='btn btn-info' id='fwd'>Go Forward in History</button>
  <script>
    ZC.LICENSE = ["569d52cefae586f634c54f86dc99e6a9", "b55b025e438fa8a98e32482b5f768ff5"];
    var myConfig = {
      history: {},
      "graphset": [{
        "id": "zc",
        "subtitle": {
          "text": "Click a bar to load a new chart!"
        },
        "type": "bar",
        "series": [{
            "values": [11],
            "url": "https://storage.googleapis.com/zingchart-com.appspot.com/child1.txt",
            "target": "graph=zc"
          },
          {
            "values": [44],
            "url": "https://storage.googleapis.com/zingchart-com.appspot.com/child2.txt",
            "target": "graph=zc"
          },
          {
            "values": [26],
            "url": "https://storage.googleapis.com/zingchart-com.appspot.com/child3.txt",
            "target": "graph=zc"
          }
        ]
      }]
    };

    zingchart.render({
      id: 'myChart',
      data: myConfig,
      height: '600',
      width: '800',
      // turn off ZingChart default headers for cors
      cacheControl: '',
    });

    document.getElementById('back').addEventListener('click', function() {
      zingchart.exec('myChart', 'goback');
    });
    document.getElementById('fwd').addEventListener('click', function() {
      zingchart.exec('myChart', 'goforward');
    });
  </script>
</body>

</html>

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8">
  <title>ZingSoft Demo</title>
  <script src="//www.zingchart.com/scripts/zcDocs.js"></script>
  <link href='//www.zingchart.com/css/zcDocs.css' rel='stylesheet' type='text/css'>
  <script src="https://cdn.zingchart.com/zingchart.min.js"></script>
</head>

<body>
  <div id='myChart'></div>
  <button class='btn btn-info' id='back'>Go Back in History</button>
  <button class='btn btn-info' id='fwd'>Go Forward in History</button>
</body>

</html>

html,
body {
  height: 100%;
  width: 100%;
}

var myConfig = {
  history: {},
  "graphset": [{
    "id": "zc",
    "subtitle": {
      "text": "Click a bar to load a new chart!"
    },
    "type": "bar",
    "series": [{
        "values": [11],
        "url": "https://storage.googleapis.com/zingchart-com.appspot.com/child1.txt",
        "target": "graph=zc"
      },
      {
        "values": [44],
        "url": "https://storage.googleapis.com/zingchart-com.appspot.com/child2.txt",
        "target": "graph=zc"
      },
      {
        "values": [26],
        "url": "https://storage.googleapis.com/zingchart-com.appspot.com/child3.txt",
        "target": "graph=zc"
      }
    ]
  }]
};

zingchart.render({
  id: 'myChart',
  data: myConfig,
  height: '600',
  width: '800',
  // turn off ZingChart default headers for cors
  cacheControl: '',
});

document.getElementById('back').addEventListener('click', function() {
  zingchart.exec('myChart', 'goback');
});
document.getElementById('fwd').addEventListener('click', function() {
  zingchart.exec('myChart', 'goforward');
});