我正在使用bootstrap，我想在调整Web浏览器窗口大小时禁用div的大小调整。我想这样做是因为我在div中有一个div（用于拖放），所以每次调整窗口大小时，第二个div会改变它在背景上的位置。 问题出现在id = 1 的 div中，我希望它有一个固定的大小，所以每次我调整浏览器的大小都会保持相同的大小，允许它内部的div不改变它的位置。
<body>
<div class="container">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="index.html">Index</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false"
aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="home.html">home
<span class="sr-only">(current)</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link" href="building.html">Building</a>
</li>
<li class="nav-item">
<a class="nav-link" href="truck.html">Truck</a>
</li>
</ul>
</div>
</nav>
<div>
<div class="myNewDivHeight2">
<img id="drag1" src="images/truck.png" draggable="true" ondragstart="drag(event)">
</div>
<br>
<br>
<div class="bgimg myNewDivHeight" id="div1" ondrop="drop(event)" ondragover="allowDrop(event)">
<div class="hsonuc">DIV</div>
</div>
</div>
<hr class="featurette-divider">
</div>
<script src="js/JS_casa.js"></script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js" integrity="sha384-smHYKdLADwkXOn1EmN1qk/HfnUcbVRZyYmZ4qpPea6sjB/pTJ0euyQp0Mk8ck+5T"
crossorigin="anonymous"></script>
的CSS：
@media screen and (min-width: 500px) { //this is to allways show the background image of the div
.myNewDivHeight{
min-height: 390px;
}
}
.hsonuc {
position:absolute;
background-color: white;
top:72%;
right:50%;
margin-right:200px;
}
这是调整大小时的外观：https://imgur.com/a/wOgiXcl
修改：添加更多代码