JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.0.0/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.0.0/js/bootstrap.min.js"></script>
    <!-- Fixed navbar -->
<body>
    <div class="navbar navbar-default navbar-fixed-top">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="navbar-brand" href="#">Project name</a>
        </div>
        <div class="navbar-collapse collapse">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#about">About</a></li>
            <li><a href="#contact">Contact</a></li>
            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
              <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li class="divider"></li>
                <li class="dropdown-header">Nav header</li>
                <li><a href="#">Separated link</a></li>
                <li><a href="#">One more separated link</a></li>
              </ul>
            </li>
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li><a href="../navbar/">Default</a></li>
            <li><a href="../navbar-static-top/">Static top</a></li>
            <li class="active"><a href="./">Fixed top</a></li>
          </ul>
        </div><!--/.nav-collapse -->
      </div>
    </div>

    <h2>Page heading - I don't want this to scroll either</h2>
        
    <div class="mygrid-wrapper-div">
        <table class="table">
       ...

CSS

body {
  padding-top: 70px;
  border:1px solid black;
}

.mygrid-wrapper-div {
    border: solid red 5px;
    overflow: scroll;
}

JavaScript

$(function() {  
    var window_height = $(window).height(),
       content_height = window_height - 200;

    $('.mygrid-wrapper-div').height(content_height);
});

$( window ).resize(function() {
    var window_height = $(window).height(),
       content_height = window_height - 200;
    $('.mygrid-wrapper-div').height(content_height);
});