当我将鼠标悬停在按钮边缘时，我想知道如何使所有的条形图变黑。目前，当我悬停在中间条上时，我只能让一个条变黑，但我不知道如何在鼠标悬停在实际按钮上时使所有条变黑。
这是jsfiddle：https://jsfiddle.net/nc0L83am/
这是代码：
<html>
<head>
<link rel="stylesheet" media="all" type="text/css" href="drop.css">
<style>
.c-hamburger {
display: block;
position: relative;
overflow: hidden;
margin: 0;
padding: 0;
width: 64px;
height: 64px;
font-size: 0;
text-indent: -9999px;
appearance: none;
box-shadow: none;
border-radius: none;
border: none;
cursor: pointer;
transition: background 0.1s;
border-radius:10px;
background: blue;
}
.c-hamburger:focus {
outline: none;
}
.c-hamburger span:hover{background: black;}
.c-hamburger span {
display: block;
position: absolute;
top: 28px;
left: 10px;
right: 10px;
height: 8px;
background: #e6e6e6;
border-radius:100px;
}
.c-hamburger span::before,
.c-hamburger span::after {
position: absolute;
display: block;
left: 0;
width: 100%;
height: 8px;
background-color: #e6e6e6;
content: "";
border-radius:100px;
}
.c-hamburger span::before {
top: -15px;
}
.c-hamburger span::after {
bottom: -15px;
}
.c-hamburger--htx {
}
.c-hamburger--htx span {
transition: background 0s 0.1s;
}
.c-hamburger--htx span::before,
.c-hamburger--htx span::after {
transition-duration: 0.1s, 0.1s;
transition-delay: 0.1s, 0s;
}
.c-hamburger--htx span::before {
transition-property: top, transform;
}
.c-hamburger--htx span::after {
transition-property: bottom, transform;
}
/* active state, i.e. menu open */
.c-hamburger--htx.is-active {
background-color: #cb0032;
}
.c-hamburger--htx.is-active span {
background: none;
}
.c-hamburger--htx.is-active span::before {
top: 0;
transform: rotate(45deg);
background: white;
}
.c-hamburger--htx.is-active span::after {
bottom: 0;
transform: rotate(-45deg);
background: white;
}
.c-hamburger--htx.is-active span::before,
.c-hamburger--htx.is-active span::after {
transition-delay: 0s, 0.1s;
}
</style>
</head>
<body>
<button class="c-hamburger c-hamburger--htx">
<span>toggle menu</span>
</button>
<script>
(function() {
"use strict";
var toggles = document.querySelectorAll(".c-hamburger");
for (var i = toggles.length - 1; i >= 0; i--) {
var toggle = toggles[i];
toggleHandler(toggle);
};
function toggleHandler(toggle) {
toggle.addEventListener( "click", function(e) {
e.preventDefault();
(this.classList.contains("is-active") === true) ? this.classList.remove("is-active") : this.classList.add("is-active");
});
}
})();
</script>
</body>
将悬停移动到按钮，而不是span
.c-hamburger:hover span,
.c-hamburger:hover span::before,
.c-hamburger:hover span::after {
background: black;
}