JSFiddle - React, Tailwind, and code Playground

HTML

<table>
    <tr>
        <td>
             <H3><nobr>Form Label</nobr></td>
  <td class="ms-formbody">  
     <!-- FieldName='Location ID'   FieldInternalName='dev_LocationID'  -->
    <select name="ctl00$dev_LocationID" id="ctl00_dev_LocationID">
    <option value="Please choose...">Please choose...</option>
    <option selected="selected" value="1">Location 1</option>
    <option selected="selected" value="1">Location 2</option>
  </select>
  </td>
</tr>
</table>

JavaScript

function searchComments($dom) {
    var comments = [];

    $dom.contents().each(function (idx, node) {
        if (node.nodeType === Node.ELEMENT_NODE) {
            comments = comments.concat(searchComments($(node)));
        } else if (node.nodeType === Node.COMMENT_NODE) {
            comments.push(node);
        }
    });
    return comments;
}

function fnFindThisField(myField) {
    var myFieldInternalName = "FieldInternalName='" + myField + "'";
    var foundCommentNode = null;
    
    searchComments($(document.body)).every(function (commentNode) {
        if (commentNode.nodeValue.indexOf(myFieldInternalName) !== -1) {
            foundCommentNode = commentNode;
            return false;
        }
        return true;
    });
    return foundCommentNode;
}
console.log(fnFindThisField("dev_LocationID").parentNode);