html table to json code example

Example 1: convert json data to a html table

var _table_ = document.createElement('table'),
  _tr_ = document.createElement('tr'),
  _th_ = document.createElement('th'),
  _td_ = document.createElement('td');

// Builds the HTML Table out of myList json data from Ivy restful service.
function buildHtmlTable(arr) {
  var table = _table_.cloneNode(false),
    columns = addAllColumnHeaders(arr, table);
  for (var i = 0, maxi = arr.length; i < maxi; ++i) {
    var tr = _tr_.cloneNode(false);
    for (var j = 0, maxj = columns.length; j < maxj; ++j) {
      var td = _td_.cloneNode(false);
      cellValue = arr[i][columns[j]];
      td.appendChild(document.createTextNode(arr[i][columns[j]] || ''));
      tr.appendChild(td);
    }
    table.appendChild(tr);
  }
  return table;
}

// Adds a header row to the table and returns the set of columns.
// Need to do union of keys from all records as some records may not contain
// all records
function addAllColumnHeaders(arr, table) {
  var columnSet = [],
    tr = _tr_.cloneNode(false);
  for (var i = 0, l = arr.length; i < l; i++) {
    for (var key in arr[i]) {
      if (arr[i].hasOwnProperty(key) && columnSet.indexOf(key) === -1) {
        columnSet.push(key);
        var th = _th_.cloneNode(false);
        th.appendChild(document.createTextNode(key));
        tr.appendChild(th);
      }
    }
  }
  table.appendChild(tr);
  return columnSet;
}

document.body.appendChild(buildHtmlTable([{
    "name": "abc",
    "age": 50
  },
  {
    "age": "25",
    "hobby": "swimming"
  },
  {
    "name": "xyz",
    "hobby": "programming"
  }
]));

Example 2: html to json

fetch('https://www.example.com/index.html')
  .then(res => res.text())
  .then(html => console.log(html));

Example 3: convert json data into html table

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<body onLoad="buildHtmlTable('#excelDataTable')">
  <table id="excelDataTable" border="1">
  </table>
</body>

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Javascript Example

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