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javascript - html中的script标签放在哪里？

问题描述

我制作了一个简单的 javascript 文件来向我的导航添加一个类，以便在单击汉堡图标时显示。我已经使用脚本标签将其添加到我的 html 文件中，但它似乎不起作用。点击汉堡什么都不做。我检查了 F12，它可以正常导入文件，没有错误，不确定问题是什么。

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>
      <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Odit, id distinctio. Qui laboriosam labore nostrum ut accusantium vel? Nam, eum distinctio illo at quae delectus tempore beatae placeat aliquam ut?<br>Lorem ipsum dolor sit amet consectetur
        adipisicing elit. Explicabo, dolorum. Vero tempora repudiandae vitae. Officia impedit nostrum inventore labore, hic quis, illum illo, error incidunt iste quasi optio atque temporibus?<br>Lorem ipsum dolor sit amet consectetur adipisicing elit.
        Natus adipisci, dolore dicta reprehenderit quibusdam eum sunt reiciendis, saepe non perferendis rem iusto eos est fugit! Facilis cumque odio nisi libero?</p>
    </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">
        Lorem ipsum dolor sit amet consectetur adipisicing elit. Hic, deleniti voluptatem fugiat dolore vitae quis velit, quam eaque corporis perferendis incidunt enim beatae? Reprehenderit modi perspiciatis omnis vitae officia mollitia!
      </div>
    </div>
  </footer>
</body>

</html>

一切都在正确的文件夹中，因为它可以很好地导入文件，当我单击时没有任何反应。

TIA

标签： javascripthtmlcss

解决方案

因为您在生成任何 HTML 内容之前将 javascript 放在单独的文件中，所以我认为您应该等待 HTML 完全加载，然后再绑定事件侦听器。正如所指出的 - 陈述"in a separate file"可能会被误解并导致混乱。我没有说清楚的一点是，在 DOM 完全准备好之前尝试调用处理 DOM 的 javascript 将无法产生预期的结果，并且通常会导致错误。

所以调用navSlide（无论是在外部文件还是内联脚本中）也许可以这样尝试：

document.addEventListener('DOMContentLoaded',navSlide );

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