【发布时间】：2019-12-06 09:37:42
【问题描述】：
我有这样的代码。
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<style>
</style>
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-sm-3 px-1 bg-dark">
<div class="py-2 sticky-top flex-grow-1">
<div class="nav flex-sm-column">
<a href="" class="nav-link d-none d-sm-inline">Sidebar</a>
<a href="" class="nav-link">Link</a>
<a href="" class="nav-link">Link</a>
<a href="" class="nav-link">Link</a>
<a href="" class="nav-link">Link</a>
<a href="" class="nav-link">Link</a>
</div>
</div>
</div>
<div class="col" id="main">
<h1>Main Area</h1>
<p>Sriracha biodiesel taxidermy organic post-ironic, Intelligentsia salvia mustache 90's code editing brunch. Butcher polaroid VHS art party, hashtag Brooklyn deep v PBR narwhal sustainable mixtape swag wolf squid tote bag. Tote bag cronut semiotics,
raw denim deep v taxidermy messenger bag. Tofu YOLO Etsy, direct trade ethical Odd Future jean shorts paleo. Forage Shoreditch tousled aesthetic irony, street art organic Bushwick artisan cliche semiotics ugh synth chillwave meditation.
Shabby chic lomo plaid vinyl chambray Vice. Vice sustainable cardigan, Williamsburg master cleanse hella DIY 90's blog.</p>
<p>Ethical Kickstarter PBR asymmetrical lo-fi. Dreamcatcher street art Carles, stumptown gluten-free Kickstarter artisan Wes Anderson wolf pug. Godard sustainable you probably haven't heard of them, vegan farm-to-table Williamsburg slow-carb
readymade disrupt deep v. Meggings seitan Wes Anderson semiotics, cliche American Apparel whatever. Helvetica cray plaid, vegan brunch Banksy leggings +1 direct trade. Wayfarers codeply PBR selfies. Banh mi McSweeney's Shoreditch selfies,
forage fingerstache food truck occupy YOLO Pitchfork fixie iPhone fanny pack art party Portland.</p>
<p>Sriracha biodiesel taxidermy organic post-ironic, Intelligentsia salvia mustache 90's code editing brunch. Butcher polaroid VHS art party, hashtag Brooklyn deep v PBR narwhal sustainable mixtape swag wolf squid tote bag. Tote bag cronut semiotics,
raw denim deep v taxidermy messenger bag. Tofu YOLO Etsy, direct trade ethical Odd Future jean shorts paleo. Forage Shoreditch tousled aesthetic irony, street art organic Bushwick artisan cliche semiotics ugh synth chillwave meditation.
Shabby chic lomo plaid vinyl chambray Vice. Vice sustainable cardigan, Williamsburg master cleanse hella DIY 90's blog.</p>
<p>Sriracha biodiesel taxidermy organic post-ironic, Intelligentsia salvia mustache 90's code editing brunch. Butcher polaroid VHS art party, hashtag Brooklyn deep v PBR narwhal sustainable mixtape swag wolf squid tote bag. Tote bag cronut semiotics,
raw denim deep v taxidermy messenger bag. Tofu YOLO Etsy, direct trade ethical Odd Future jean shorts paleo. Forage Shoreditch tousled aesthetic irony, street art organic Bushwick artisan cliche semiotics ugh synth chillwave meditation.
Shabby chic lomo plaid vinyl chambray Vice. Vice sustainable cardigan, Williamsburg master cleanse hella DIY 90's blog.</p>
</div>
</div>
</div>
<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/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
</body>
</html>
https://www.w3schools.com/code/tryit.asp?filename=G6GLE5UA2TUM（上面的代码可以按run运行）
当分辨率的宽度小于约 580 像素时，此代码将左侧边栏移动到屏幕顶部。但是，我想改变这种行为，当分辨率的宽度小于 1024 像素而不是 580 像素时，它会将左侧栏移动到屏幕顶部。
如何使用 Bootstrap 4 做到这一点？
【问题讨论】：
标签： html css twitter-bootstrap twitter-bootstrap-3 bootstrap-4