select下拉折叠动画效果-html代码-BFW代码库

select下拉折叠动画效果

代码语言：html

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开


<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Gaegu:400,700&amp;display=swap'>
<style>
* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--foldDur: 0.7s;
	font-size: calc(24px + (30 - 24)*(100vw - 320px)/(1280 - 320));
}
body, button {
	color: #171717;
	font: 1em Gaegu, cursive;
	line-height: 1.5;
}
body {
	background-image:
		linear-gradient(#8ccfd100 1.35em,#8ccfd1 1.4em 1.45em,#8ccfd100 1.5em),
		linear-gradient(90deg,#e5e5e5 1.35em,#8ccfd1 1.4em 1.45em,#e5e5e5 1.5em);
	background-position: 50% 0;
	background-size: 1.5em 1.5em;
}
form, .select__button, .select__options {
	width: 100%;
}
form {
	margin: auto;
	padding: 3em 1.5em 6em 1.5em;
	max-width: 13.25em;
}
label {
	display: block;
	font-weight: bold;
}
.select, .select__button {
	position: relative;
}
.select {
	margin-bottom: 1.5em;
	perspective: 20em;
}
.select select {
	display: none;
}
.select__button, .select__option {
	background: #f1f1f1;
	cursor: pointer;
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 0 0.375em;
}
.select__button {
	animation-duration: var(--foldDur);
	animation-timing-function: ease-in-out;
	animation-direction: reverse;
	border-radius: 0;
	box-shadow:
		-0.05em 0 0 #fff inset,
		0.05em 0 0 #ccc inset,
		0 -0.05em 0 #d9d9d9 inset;
	transform-origin: 50% 100%;
	-webkit-appearance: none;
	appearance: none;
	z-index: 1;
}
.select__button:focus, .select__option:focus {
	outline: transparent;
}
.select__button:focus {
	color: #2762f3;
}
.select__button:after, .select__option:first-child:after {
	border-left: 0.25em solid transparent;
	border-right: 0.25em solid transparent;
	content: "";
	display: block;
	width: 0;
	height: 0;
}
.select__button:after {
	border-top: 0.25em solid;
}
.select__button--pristine {
	animation: none;
}
.select__options {
	position: absolute;
	top: 0;
	left: 0;
	visibility: hidden;
	transition: visibility 0s var(--foldDur) steps(1);
}
.select__option {
	box-shadow:
		-0.05em -0.1em 0.2em 0 #0001 inset,
		0.05em 0 0 #ccc inset,
		-0.05em 0.1em 0.2em 0 #fff inset,
		-0.05em 0 0 #fff inset;
	color: inherit;
	opacity: 0;
	text-decoration: none;
	transition: opacity 0s var(--foldDur) steps(1);
}
.select__option:first-child {
	box-s.........完整代码请登录后点击上方下载按钮下载查看