【发布时间】：2021-01-19 14:34:49
【问题描述】：
每当我点击汉堡图标时，菜单就会打开，但当我再次点击它时，它应该会关闭……但事实并非如此。我正在尝试调试，但我不知道出了什么问题。如果有人知道，请帮忙
// Hamberger menu
const navSearch = document.querySelector('.nav-search');
const navLeft = document.querySelector('.nav-left');
document.querySelector('.toggle').addEventListener('click', () => {
console.log(navSearch.style.display);
console.log('1');
if(navSearch.style.display = "none") {
console.log('2');
navSearch.style.display = "inline-block";
navLeft.style.display = "inline-block";
console.log(navSearch.style.display);
} else if(navSearch.style.display = "inline-block") {
console.log('3');
navSearch.style.display = "none";
navLeft.style.display = "none";
}
console.log('......');
});// Variables
$website-width: 1280px;
$color-main: #4bbf73;
$color-dark: #343a40;
$color-light: #fff;
$color-lightx2: #f7f7f9;
//General Styles
* {
margin: 0;
padding: 0;
}
body {
background-color: $color-light;
font-family: "Nunito", Arial, Helvetica, sans-serif;
line-height: 1.6;
}
a {
text-decoration: none;
color: $color-light;
}
ul {
list-style: none;
}
h2,
h3,
h4 {
text-transform: uppercase;
}
img {
width: 100%;
}
input {
border: none;
padding: 0.7rem 1rem;
background: $color-lightx2;
&:focus {
outline: none;
}
}
// Utilities
.container {
max-width: $website-width;
padding: 0 1.5rem;
margin: auto;
overflow: hidden;
}
// navbar
header {
background: $color-dark;
height: 100px;
#navbar {
padding-top: 1.3rem;
color: $color-light;
display: flex;
flex-wrap: wrap;
justify-content: space-between;
align-items: center;
.nav-logo {
font-size: 1.5rem;
font-weight: 900;
letter-spacing: 2px;
padding: 0.5rem 1rem;
}
ul {
display: flex;
justify-content: center;
li {
padding-left: 1.5rem;
}
}
input[type="submit"] {
margin-left: 0.4rem;
background-color: inherit;
border: $color-main 2px solid;
color: $color-main;
&:hover {
background-color: $color-main;
color: $color-light;
transition: all 0.2s ease-in-out;
}
}
input[type="text"] {
padding: 0.7rem 1rem;
}
}
.toggle {
position: absolute;
top: 2.2rem;
right: 6rem;
transform: scale(2);
display: none;
}
}
@import 'media';
@media (max-width: 850px) {
header {
height: auto;
#navbar {
flex-direction: column;
align-items: start;
input[type="text"] {
margin: 1rem 0 1.4rem 3rem;
}
ul {
padding-bottom: 1rem;
}
}
.toggle {
display: inline-block;
}
.nav-search,
.nav-left {
display: none;
}
}
}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!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="https://use.fontawesome.com/releases/v5.15.0/css/all.css"
integrity="sha384-OLYO0LymqQ+uHXELyx93kblK5YIS3B2ZfLGBmsJaUyor7CpMTBsahDHByqSuWW+q" crossorigin="anonymous">
<link href="https://fonts.googleapis.com/css2?family=Nunito:wght@300&display=swap" rel="stylesheet">
<link rel="stylesheet" href="scss/style.css">
<title>AllMart</title>
</head>
<body>
<header>
<div class="container">
<nav id="navbar">
<div class="nav-logo">
<a href="index.html">AllMart</a>
</div>
<div class="nav-search">
<form>
<input type="text" placeholder="Search Product...">
<input type="submit" value="SEARCH">
</form>
</div>
<div class="nav-left">
<ul>
<li id="cart"><a href="#"><i class="fas fa-shopping-cart"></i> CART</a></li>
<li id="profile"><a href="#"><i class="fas fa-user"></i> SIGN IN</a></li>
</ul>
</div>
</nav>
<span class="toggle"><a href="#"><i class="fas fa-bars"></i></a></span>
</div>
</header>
<script src="js/index.js"></script>
</body>
</html>这是我点击图标时得到的输出
不知道哪里出了问题，如果有人知道，请帮忙
【问题讨论】：
-
if(navSearch.style.display = "none") { -
@epascarello 据我所知，它会首先检查括号内的表达式是真还是假，以及括号内的真实代码是否会被执行。
-
... 然后再想一想 ;-) ... 它会将值
"none"分配 到属性display的navSearch.style。此分配的结果将始终为true。 -
哦，我知道我应该使用 ===
标签： javascript html css dom frontend