【发布时间】：2020-05-23 04:02:31
【问题描述】：
我使用几个教程拼凑了一个投资组合网站，但我无法弄清楚为什么汉堡菜单在缩小时不可见。当我用部分取出 HTML 中的主要内容时，它工作正常，但如果有任何主要内容，则汉堡菜单不会出现。
HTML：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="style.css">
<link href="https://fonts.googleapis.com/css2?family=Poppins:wght@400;500&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Audiowide&display=swap" rel="stylesheet">
<title>Portfolio</title>
</head>
<body>
<nav>
<div class="logo">
<h4>Portfolio</h4>
</div>
<ul class="nav-links">
<li><a href="#home">Home</a></li>
<li><a href="#about">About</a></li>
<li><a href="#portfolio">Portfolio</a></li>
<li><a href="#contact">Contact</a></li>
</ul>
<div class="burger">
<div class="line1"></div>
<div class="line2"></div>
<div class="line3"></div>
</div>
</nav>
<main>
<div class="about-area" id="about">
<div class="text-part">
<h1>About</h1>
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore ullam,
exercitationem voluptate enim nobis id quas praesentium, fugit ipsum porro omnis!
Illo eum exercitationem eius, quam quae deserunt? Distinctio, voluptatibus. Lorem
ipsum dolor sit amet consectetur adipisicing elit. Repellendus non ab iure, debitis
minima at maxime nisi? Illum nesciunt nihil hic, provident dolorem molestias distinctio
optio officia suscipit nemo natus!</p>
</div>
</div>
<div class="portfolio-area" id="portfolio">
<div class="text-part">
<h1>Portfolio</h1>
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore ullam,
exercitationem voluptate enim nobis id quas praesentium, fugit ipsum porro omnis!
Illo eum exercitationem eius, quam quae deserunt? Distinctio, voluptatibus. Lorem
ipsum dolor sit amet consectetur adipisicing elit. Repellendus non ab iure, debitis
minima at maxime nisi? Illum nesciunt nihil hic, provident dolorem molestias distinctio
optio officia suscipit nemo natus!</p>
</div>
</div>
<div class="contact-area" id="contact">
<div class="text-part">
<h1>Contact</h1>
<p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Tempore ullam,
exercitationem voluptate enim nobis id quas praesentium, fugit ipsum porro omnis!
Illo eum exercitationem eius, quam quae deserunt? Distinctio, voluptatibus. Lorem
ipsum dolor sit amet consectetur adipisicing elit. Repellendus non ab iure, debitis
minima at maxime nisi? Illum nesciunt nihil hic, provident dolorem molestias distinctio
optio officia suscipit nemo natus!</p>
</div>
</div>
</main>
<script src="app.js"></script>
</body>
</html>
CSS：
* {
margin: 0px; /* Remove unwanted inherent sizing */
padding: 0px;
box-sizing: border-box;
font-family: 'Poppins', sans-serif;
}
nav {
display: flex; /*icons are next to each other */
justify-content: space-around; /* */
align-items: center; /* Center items vertically */
min-height: 8vh;
background-color: #0e9763;
font-family: 'Poppins', sans-serif;
}
.logo {
color: rgb(226, 226, 226);
text-transform: uppercase;
letter-spacing: 5px;
font-size: 20px;
}
.nav-links {
display: flex; /* spreads out text */
justify-content: space-around; /* using flex adds more space around the items using width */
width: 30%;
}
.nav-links li {
list-style: none; /* Removes bullet points */
}
.nav-links a{
color: rgb(226, 226, 226);
text-decoration: none; /* Removes default link colors */
letter-spacing: 3px;
font-size: 14px;
}
.burger {
display: none; /* Hides the burger menu */
cursor: pointer;
}
.burger div { /*the details of the burger menu bars design */
width: 25px;
height: 3px;
background-color: rgb(226, 226, 226);
margin: 5px;
transition: all 0.3s ease;
}
/* Main Area Content */
.about-area, .portfolio-area, .contact-area {
position: relative;
display: flex;
justify-content: space-around;
align-items: center;
flex-wrap: wrap;
flex-direction: row;
width: 100%;
height: 700px;
}
.text-part {
width: 65%;
height: 80%;
}
h1 {
font-size: 50px;
font-family: 'Audiowide', cursive;
}
p {
font-size: 24px;
line-height: 50px;
}
.about-area {
background: #fefefe;
}
.portfolio-area {
background: #0e9763;
color: #fff;
}
.contact-area {
background: #fefefe;
}
html {
scroll-behavior: smooth;
}
a:hover {
color: #000;
}
/* Quick fix breakpoint between max size and hamburger menu trigger */
@media screen and (max-width:1024px){
.nav-links {
width: 60%;
}
}
@media screen and (max-width:768px){
body {
overflow: hidden;
}
.nav-links {
position: absolute;
right: 0px;
height: 92vh;
top: 8vh;
background-color: #0e9763;
display: flex;
flex-direction: column;
align-items: center;
width: 50%;
transform: translateX(100%); /* Moves content off screen */
transition: transform 0.5s ease-in;
}
.nav-links li {
opacity: 0;
}
.burger {
display: block;
}
}
.nav-active {
transform: translateX(0%); /* When button is clicked the nav gets the transform */
}
/* Nav animation */
@keyframes navLinkFade{
from{
opacity: 0;
transform: translateX(50px);
}
to {
opacity: 1;
transform: translateX(0px);
}
}
.toggle .line1 {
transform: rotate(-45deg) translate(-5px,6px);
}
.toggle .line2 {
opacity: 0;
}
.toggle .line3 {
transform: rotate(45deg) translate(-5px,-6px);
}
JS：
const navSlide = () => { //navSlide is = to an anonymous function
const burger = document.querySelector('.burger');
const nav = document.querySelector('.nav-links');
const navLinks = document.querySelectorAll('.nav-links li');
burger.addEventListener('click',() => { //on click run a function
//Toggle Nav
nav.classList.toggle('nav-active');
//Animate Links
navLinks.forEach((link, index) => {
if (link.style.animation){
link.style.animation = ''
} else {
link.style.animation = `navLinkFade 0.5s ease forwards ${index / 7 + 0.5}s`
}
});
//Burger Animation
burger.classList.toggle('toggle');
});
}
//Invoke function
navSlide();
这里是codepen的链接： https://codepen.io/justadirtgrub/pen/NWGJrde
【问题讨论】：
标签： javascript html css