我已经制作了一个简单的javascript文件，将一个类添加到导航中，以便在单击汉堡图标时显示该类。我已经使用脚本标签将其添加到我的html文件中，但是它似乎不起作用。单击汉堡没有任何作用。我检查了F12，它可以正确地导入文件且没有错误（不确定是什么问题）。
const navSlide = () => {
const burger = document.querySelector('.burger');
const nav = document.querySelector('.nav-links');
burger.addEventListener('click', () => {
nav.classList.toggle('nav-active');
});
}
navSlide();.nav-links {
display: flex;
justify-content: space-around;
align-items: center;
width: 40%;
list-style: none;
transition: transform 0.5s ease-in;
}
.nav-active {
transform: translateX(0%);
}
@media screen and (max-width: 1100px) {
body {
overflow-x: hidden;
}
.nav-links {
position: absolute;
right: 0px;
top: 0px;
height: 100vh;
background: #009af3;
display: flex;
flex-direction: column;
align-items: center;
z-index: 4;
transform: translateX(100%);
}
.nav-link {
opacity: 0;
}
.burger {
display: block;
}
nav {
justify-content: space-between;
margin: auto;
width: 80%;
}
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Home - Leicster Production Services</title>
<link rel="stylesheet" href="/css/pages/index.css">
<link rel="stylesheet" href="/css/media-queries/index.css">
<link rel="stylesheet" href="https://use.typekit.net/rum4qex.css">
<script src="/js/burger.js"></script>
</head>
<body>
<header class="header">
<div class="header-main">
<nav>
<div class="logo-container">
<img src="/images/Business/logo.png" alt="LPS Logo">
</div>
<ul class="nav-links">
<li><a class="nav-link active" href="#">Home</a></li>
<li><a class="nav-link" href="#">Production</a></li>
<li><a class="nav-link" href="#">Dry Hire</a></li>
<li><a class="nav-link" href="#">Installation</a></li>
<li><a class="nav-link" href="#">About Us</a></li>
<li><a class="nav-link" href="#">Contact</a></li>
</ul>
<div class="burger">
<div class="line1"></div>
<div class="line2"></div>
<div class="line3"></div>
</div>
</nav>
<div class="header-content">
<h3>Welcome to</h3>
<img src="./images/Business/logo.png" alt="LPS Logo">
<a class="button" href="#">View Hire Catalogue</a>
</div>
</div>
<div class="hire-bar">
<h3>Hire Catagories</h3>
<h3>Lighting</h3>
<h3>Sound</h3>
<h3>Video</h3>
<h3>Rigging</h3>
</div>
</header>
<div class="columns">
<a href="#">
<div class="column1">
<h3>Dry Hire</h3>
</div>
</a>
<a href="#">
<div class="column2">
<h3>Production</h3>
</div>
</a>
<a href="#">
<div class="column3">
<h3>Installation</h3>
</div>
</a>
</div>
<div class="main-content">
<div class="left">
<h1>A Brief Introduction</h1>
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</div>
<div class="right">
<h1>News</h1>
<br>
<div class="inner-column">
<div class="inner-left">
</div>
<div class="inner-right">
<h2>New Equipment!</h2>
<p>We have recently taken shipment of some new equipemnt! Check our hire catalogue for more info!</p>
<a href="#">More info -></a>
</div>
</div>
<br>
<br>
<div class="inner-column">
<div class="inner-left">
</div>
<div class="inner-right">
<h2>New Equipment!</h2>
<p>We have recently taken shipment of some new equipemnt! Check our hire catalogue for more info!</p>
<a href="#">More info -></a>
</div>
</div>
</div>
</div>
<footer>
<div class="top-footer">
<div class="site-map">
<div class="footer-section">
<h3>Hire Catalogue</h3>
<ul>
<li><a href="#">Audio</a></li>
<li><a href="#">Lighting</a></li>
<li><a href="#">Power</a></li>
<li><a href="#">Production</a></li>
<li><a href="#">Rigging</a></li>
<li><a href="#">Drapes</a></li>
<li><a href="#">Staging</a></li>
<li><a href="#">Video</a></li>
<li><a href="#">Effects</a></li>
</ul>
</div>
<div class="footer-section">
<h3>Services</h3>
<ul>
<li><a href="#">Dry Hire</a></li>
<li><a href="#">Production</a></li>
<li><a href="#">Installation</a></li>
<li><a href="#">Custom Events</a></li>
</ul>
</div>
<div class="footer-section">
<h3>Company</h3>
<ul>
<li><a href="#">News</a></li>
<li><a href="#">Meet The Team</a></li>
<li><a href="#">About Us</a></li>
<li><a href="#">Legal Stuff</a></li>
</ul>
</div>
<div class="footer-section">
<h3>Clients</h3>
<ul>
<li><a href="#">Get a Quote</a></li>
<li><a href="#">New Clients</a></li>
<li><a href="#">Contact Us</a></li>
</ul>
</div>
</div>
</div>
<div class="bottom-footer">
<div class="logo-container">
<img src="/images/Business/logo-invert.png" alt="LPS Logo">
</div>
<div class="legal-info">
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</div>
</div>
</footer>
</body>
</html>
一切正常，因为它可以很好地导入文件，所以单击时什么也没发生。
TIA
答案 0 :(得分：2)
因为在生成任何HTML内容之前，您将javascript保存在一个单独的文件中，所以我认为应该在绑定事件侦听器之前等待HTML完全加载。如所指出的那样-通过声明"in a separate file"可能会误解并导致混乱。我无法明确指出的是，在DOM完全准备就绪之前尝试调用处理DOM的javascript不会产生预期的结果，并且经常会导致错误。
因此，调用navSlide（无论是在外部文件还是内联脚本中）也许可以尝试如下：
document.addEventListener('DOMContentLoaded',navSlide );