html - 显示问题div里面的元素

Question

我正在为我的网站创建页脚。我遇到的问题似乎很平庸，也许不是。在“footer”元素内部是一个“ul”列表，在它们内部是“li”，带有指向社交媒体的链接。Chrome 浏览器不显示这些元素，类似于 Opera 和 Mozilla。问题出在哪里？我的想法不多了。

* {
	box-sizing: border-box;
	padding: 0;
	margin: 0;
}
body {
	font-family: 'Lato', 'Josefin Sans', sans-serif;
	font-size: 0;
}
.navbar {
	font-size: 18px;
	width: 100%;
	position: fixed;
	background-color: rgba(0, 0, 0, 0.8);
	border: 1px solid rgba(0, 0, 0, 0.2);
	padding-bottom: 10px;
}
.main-nav {
	list-style-type: none;
}
.nav-links,
.logo {
	text-decoration: none;
	color: rgba(255, 255, 255, 0.7);
	vertical-align: middle;
}
.main-nav li {
	text-align: center;
	margin: 15px auto;
}
.logo {
	display: inline-block;
	font-size: 22px;
	margin-top: 10px;
	margin-left: 20px;
}
.navbar-toggle {
	position: absolute;
	top: 10px;
	right: 20px;
	cursor: pointer;
	color: rgba(255, 255, 255, 0.8);
	font-size: 24px;
}
.main-nav {
	list-style-type: none;
	display: none;
}
.active {
	display: block;
}
.background-image img {
	height: 100%;
	width: 100%;
}
.container {
	display: flex;
	height: 250px;
}
.column-left {
	width: 33.333%;
	background: #f2f2f2;
	border: 1px solid #e6e6e6;
}
.column-center {
	width: 33.333%;
	background: #f2f2f2;
	border: 1px solid #e6e6e6;
}
.column-right {
	width: 33.333%;
	background: #f2f2f2;
	border: 1px solid #e6e6e6;
}
.container .column-left {
	text-align: center;
	padding-top: 20px;
	font-size: 20px;
}
h2 {
	font-size: 23px;
	padding: 15px;
}
p {
	font-size: 20px;
	padding: 15px;
}
.container .column-center {
	text-align: center;
	padding-top: 20px;
	font-size: 20px;
}
.container .column-right {
	text-align: center;
	padding-top: 20px;
	font-size: 20px;
}

@media screen and (min-width: 600px) {
	.navbar {
		display: flex;
		justify-content: space-between;
		padding-bottom: 0;
		height: 70px;
		align-items: center;
	}
	.main-nav {
		display: flex;
		margin-right: 30px;
		flex-direction: row;
		justify-content: flex-end;
	}
	.main-nav li {
		margin: 0;
	}
	.nav-links {
		margin-left: 40px;
	}
	.logo {
		margin-top: 0;
	}
	.navbar-toggle {
		display: none;
	}
	.logo:hover,
	.nav-links:hover {
		color: rgba(255, 255, 255, 1);
	}
}
@media screen and (max-width: 599px) {
	h2.title {
		font-size: 15px;
	}
	p {
		font-size: 13px;
	}
}

<link href="https://fonts.googleapis.com/css?family=Lato&display=swap" rel="stylesheet">     
<script src="https://kit.fontawesome.com/8a84b6b9df.js"></script>

    <div>
        <nav class="navbar">
            <span class="navbar-toggle" id="js-navbar-toggle">
                    <i class="fas fa-bars"></i>
                </span>
            <a href="https://delightcaptures.com" class="logo"><img src="img/developer.png" alt="Sebastian Falba" width="50"></a>
            <ul class="main-nav" id="js-menu">
              <li>
                <a href="#" class="nav-links">Home</a>
              </li>
              <li>
                <a href="#" class="nav-links">About me</a>
              </li>
              <li>
                <a href="#" class="nav-links">Projects</a>
              </li>
              <li>
                <a href="#" class="nav-links">Contact</a>
              </li>
            </ul>
          </nav>
    </div>
<div class="background-image">
  <img src="img/responsive.jpg" alt="web development">
</div>
<div class="container">
  <div class="column-left"><i class="fas fa-keyboard fa-3x"></i>
    <h2 class="title">Modern design</h2>
    <p class="description">Fantastic Clean Website Designs</p>
  </div>
  <div class="column-center"><i class="far fa-window-maximize fa-3x"></i>
    <h2 class="title">Responsive</h2>
    <p class="description">Make your website mobile-friendly</p>
  </div>
  <div class="column-right"><i class="fas fa-laptop-code fa-3x"></i>
    <h2 class="title">Quality code</h2>
    <p class="description">Coding best practices are a set of my rules</p>
  </div>
</div>
<footer>
  <ul>
    <li><a href="https://twitter.com/sebastian_falba">Footer</a></li>
  </ul>
</footer>

标签： htmlcss

Answer 1

您将 设置font-size为0使文本没有高度。

由于文字没有<a>高度，所以没有高度，所以<li>没有高度，所以<ul>没有高度，到<footer>没有高度，所以你看不到它。