JSFiddle - React, Tailwind, and code Playground

CSS

th, td{border:1px solid #ccc}

JavaScript

var htmlstring = '<html><head><title>Geoserver GetFeatureInfo output</title></head><style type="text/css">    table.featureInfo, table.featureInfo td, table.featureInfo th {        border:1px solid #ddd;        border-collapse:collapse;        margin:0;        padding:0;        font-size: 90%;        padding:.2em .1em;    }    table.featureInfo th {        padding:.2em .2em;        font-weight:bold;        background:#eee;    }    table.featureInfo td{        background:#fff;    }    table.featureInfo tr.odd td{        background:#eee;    }    table.featureInfo caption{        text-align:left;        font-size:100%;        font-weight:bold;        text-transform:uppercase;        padding:.2em .2em;    }  </style>  <body><table class="featureInfo2">  <tr><th class="dataLayer" colspan="5">Tibetan Villages</th></tr><!-- EOF Data Layer --> <tr class="dataHeaders">    <th>ID</th>    <th>Latitude</th>    <th>Longitude</th>    <th>Place Name</th>    <th>English Translation</th> </tr><!-- EOF Data Headers --><!-- Data -->    <tr>    <!-- Feature Info Data -->    <td>3394</td>     <td>29.1</td>     <td>93.15</td>      <td>བསྡམས་གྲོང་ཚོ།</td>    <td>Dam Drongtso </td>  </tr><!-- EOF Feature Info Data --><!-- End Data --></table><br/>  </body></html>';

var dom = $('<div>').html(htmlstring);

var featureInfo = {};
    console.log( dom.find('table').length );
    $('table:has(.dataLayer)', dom).each(function(){
        var $tbl = $(this);
        var section = $tbl.find('.dataLayer').text();
        var obj = [];
        var $structure = $tbl.find('.dataHeaders');
        var structure = $structure.find('th').map(function(){return $(this).text().toLowerCase();});
        var $datarows= $structure.nextAll('tr');
        $datarows.each(function(i){
            obj[i] = {};
            $(this).find('td').each(function(index,element){
                obj[i][structure[index]] = $(element).text();
            });
        });
        featureInfo[section] = obj;
   ...