手风琴大家或许都见过，css实现的手风琴效果就不一定喽，今天我们就用css实现手风琴下拉菜单显示内容的效果，如下图所示：
<html class=" -webkit-">
<head>
<meta charset="UTF-8">
<link rel="apple-touch-icon" type="image/png"
href="https://cpwebassets.codepen.io/assets/favicon/apple-touch-icon-5ae1a0698dcc2402e9712f7d01ed509a57814f994c660df9f7a952f3060705ee.png">
<meta name="apple-mobile-web-app-title" content="CodePen">
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<link rel="mask-icon" type="image/x-icon"
href="https://cpwebassets.codepen.io/assets/favicon/logo-pin-8f3771b1072e3c38bd662872f6b673a722f4b3ca2421637d5596661b4e2132cc.svg"
color="#111">
<title>css实现手风琴下拉菜单显示内容效果</title>
<style media="" data-href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css">
button,
hr,
input {
overflow: visible
}
audio,
canvas,
progress,
video {
display: inline-block
}
progress,
sub,
sup {
vertical-align: baseline
}
html {
font-family: sans-serif;
line-height: 1.15;
-ms-text-size-adjust: 100%;
-webkit-text-size-adjust: 100%
}
body {
margin: 0
}
menu,
article,
aside,
details,
footer,
header,
nav,
section {
display: block
}
h1 {
font-size: 2em;
margin: .67em 0
}
figcaption,
figure,
main {
display: block
}
figure {
margin: 1em 40px
}
hr {
box-sizing: content-box;
height: 0
}
code,
kbd,
pre,
samp {
font-family: monospace, monospace;
font-size: 1em
}
a {
background-color: transparent;
-webkit-text-decoration-skip: objects
}
a:active,
a:hover {
outline-width: 0
}
abbr[title] {
border-bottom: none;
text-decoration: underline;
text-decoration: underline dotted
}
b,
strong {
font-weight: bolder
}
dfn {
font-style: italic
}
mark {
background-color: #ff0;
color: #000
}
small {
font-size: 80%
}
sub,
sup {
font-size: 75%;
line-height: 0;
position: relative
}
sub {
bottom: -.25em
}
sup {
top: -.5em
}
audio:not([controls]) {
display: none;
height: 0
}
img {
border-style: none
}
svg:not(:root) {
overflow: hidden
}
button,
input,
optgroup,
select,
textarea {
font-family: sans-serif;
font-size: 100%;
line-height: 1.15;
margin: 0
}
button,
input {}
button,
select {
text-transform: none
}
[type=submit],
[type=reset],
button,
html [type=button] {
-webkit-appearance: button
}
[type=button]::-moz-focus-inner,
[type=reset]::-moz-focus-inner,
[type=submit]::-moz-focus-inner,
button::-moz-focus-inner {
border-style: none;
padding: 0
}
[type=button]:-moz-focusring,
[type=reset]:-moz-focusring,
[type=submit]:-moz-focusring,
button:-moz-focusring {
outline: ButtonText dotted 1px
}
fieldset {
border: 1px solid silver;
margin: 0 2px;
padding: .35em .625em .75em
}
legend {
box-sizing: border-box;
color: inherit;
display: table;
max-width: 100%;
padding: 0;
white-space: normal
}
progress {}
textarea {
overflow: auto
}
[type=checkbox],
[type=radio] {
box-sizing: border-box;
padding: 0
}
[type=number]::-webkit-inner-spin-button,
[type=number]::-webkit-outer-spin-button {
height: auto
}
[type=search] {
-webkit-appearance: textfield;
outline-offset: -2px
}
[type=search]::-webkit-search-cancel-button,
[type=search]::-webkit-search-decoration {
-webkit-appearance: none
}
::-webkit-file-upload-button {
-webkit-appearance: button;
font: inherit
}
summary {
display: list-item
}
[hidden],
template {
display: none
}
/*# sourceMappingURL=normalize.min.css.map */
</style>
<style media="" data-href="https://fonts.googleapis.com/css?family=Titillium+Web:300,700,300italic">
/* latin-ext */
@font-face {
font-family: 'Titillium Web';
font-style: italic;
font-weight: 300;
src: url(https://fonts.gstatic.com/s/titilliumweb/v15/NaPFcZTIAOhVxoMyOr9n_E7fdMbepI5Db5yciWM.woff2) format('woff2');
unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Titillium Web';
font-style: italic;
font-weight: 300;
src: url(https://fonts.gstatic.com/s/titilliumweb/v15/NaPFcZTIAOhVxoMyOr9n_E7fdMbepI5DYZyc.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin-ext */
@font-face {
font-family: 'Titillium Web';
font-style: normal;
font-weight: 300;
src: url(https://fonts.gstatic.com/s/titilliumweb/v15/NaPDcZTIAOhVxoMyOr9n_E7ffGjEGIVzY4SY.woff2) format('woff2');
unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Titillium Web';
font-style: normal;
font-weight: 300;
src: url(https://fonts.gstatic.com/s/titilliumweb/v15/NaPDcZTIAOhVxoMyOr9n_E7ffGjEGItzYw.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
/* latin-ext */
@font-face {
font-family: 'Titillium Web';
font-style: normal;
font-weight: 700;
src: url(https://fonts.gstatic.com/s/titilliumweb/v15/NaPDcZTIAOhVxoMyOr9n_E7ffHjDGIVzY4SY.woff2) format('woff2');
unicode-range: U+0100-024F, U+0259, U+1E00-1EFF, U+2020, U+20A0-20AB, U+20AD-20CF, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
/* latin */
@font-face {
font-family: 'Titillium Web';
font-style: normal;
font-weight: 700;
src: url(https://fonts.gstatic.com/s/titilliumweb/v15/NaPDcZTIAOhVxoMyOr9n_E7ffHjDGItzYw.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
</style>
<style>
.transition,
ul li i:before,
ul li i:after,
p {
transition: all 0.25s ease-in-out;
}
.flipIn,
ul li,
h1 {
animation: flipdown 0.5s ease both;
}
.no-select,
h2 {
-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
html {
width: 100%;
height: 100%;
perspective: 900;
overflow-y: scroll;
background-color: #dce7eb;
font-family: "Titillium Web", sans-serif;
color: rgba(48, 69, 92, 0.8);
}
body {
min-height: 0;
display: inline-block;
position: relative;
left: 50%;
margin: 90px 0;
transform: translate(-50%, 0);
box-shadow: 0 10px 0 0 #ff6873 inset;
background-color: #fefffa;
max-width: 450px;
padding: 30px;
}
@media (max-width: 550px) {
body {
box-sizing: border-box;
transform: translate(0, 0);
max-width: 100%;
min-height: 100%;
margin: 0;
left: 0;
}
}
h1,
h2 {
color: #ff6873;
}
h1 {
text-transform: uppercase;
font-size: 36px;
line-height: 42px;
letter-spacing: 3px;
font-weight: 100;
}
h2 {
font-size: 26px;
line-height: 34px;
font-weight: 300;
letter-spacing: 1px;
display: block;
background-color: #fefffa;
margin: 0;
cursor: pointer;
}
p {
color: rgba(48, 69, 92, 0.8);
font-size: 17px;
line-height: 26px;
letter-spacing: 1px;
position: relative;
overflow: hidden;
max-height: 800px;
opacity: 1;
transform: translate(0, 0);
margin-top: 14px;
z-index: 2;
}
ul {
list-style: none;
perspective: 900;
padding: 0;
margin: 0;
}
ul li {
position: relative;
padding: 0;
margin: 0;
padding-bottom: 4px;
padding-top: 18px;
border-top: 1px dotted #dce7eb;
}
ul li:nth-of-type(1) {
animation-delay: 0.5s;
}
ul li:nth-of-type(2) {
animation-delay: 0.75s;
}
ul li:nth-of-type(3) {
animation-delay: 1s;
}
ul li:last-of-type {
padding-bottom: 0;
}
ul li i {
position: absolute;
transform: translate(-6px, 0);
margin-top: 16px;
right: 0;
}
ul li i:before,
ul li i:after {
content: "";
position: absolute;
background-color: #ff6873;
width: 3px;
height: 9px;
}
ul li i:before {
transform: translate(-2px, 0) rotate(45deg);
}
ul li i:after {
transform: translate(2px, 0) rotate(-45deg);
}
ul li input[type=checkbox] {
position: absolute;
cursor: pointer;
width: 100%;
height: 100%;
z-index: 1;
opacity: 0;
}
ul li input[type=checkbox]:checked~p {
margin-top: 0;
max-height: 0;
opacity: 0;
transform: translate(0, 50%);
}
ul li input[type=checkbox]:checked~i:before {
transform: translate(2px, 0) rotate(45deg);
}
ul li input[type=checkbox]:checked~i:after {
transform: translate(-2px, 0) rotate(-45deg);
}
@keyframes flipdown {
0% {
opacity: 0;
transform-origin: top center;
transform: rotateX(-90deg);
}
5% {
opacity: 1;
}
80% {
transform: rotateX(8deg);
}
83% {
transform: rotateX(6deg);
}
92% {
transform: rotateX(-3deg);
}
100% {
transform-origin: top center;
transform: rotateX(0deg);
}
}
</style>
<script>
window.console = window.console || function (t) { };
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
<script>
if (document.location.search.match(/type=embed/gi)) {
window.parent.postMessage("resize", "*");
}
</script>
</head>
<body translate="no">
<h1>CSS + HTML only Accordion Element</h1>
<ul>
<li>
<input type="checkbox" checked="">
<i></i>
<h2>Languages Used</h2>
<p>This page was written in HTML and CSS. The CSS was compiled from SASS. I used Normalize as my CSS reset and
-prefix-free to save myself some headaches. I haven't quite gotten the hang of Slim for compiling into HTML, but
someday I'll use it since its syntax compliments that of SASS. Regardless, this could all be done in plain HTML
and CSS.</p>
</li>
<li>
<input type="checkbox" checked="">
<i></i>
<h2>How it Works</h2>
<p>Using the sibling and checked selectors, we can determine the styling of sibling elements based on the checked
state of the checkbox input element. One use, as demonstrated here, is an entirely CSS and HTML accordion
element. Media queries are used to make the element responsive to different screen sizes.</p>
</li>
<li>
<input type="checkbox" checked="">
<i></i>
<h2>Points of Interest</h2>
<p>By making the open state default for when :checked isn't detected, we can make this system accessable for
browsers that don't recognize :checked. The fallback is simply an open accordion. The accordion can be
manipulated with Javascript (if needed) by changing the "checked" property of the input element.</p>
</li>
</ul>
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</html>通过以上内容我们知道了css如何实现手风琴下拉菜单显示内容的效果？感谢您访问“我爱捣鼓(www.woaidaogu.com)”网站的内容，希望对大家有所帮助！引用本文内容时，请注明出处！谢谢合作！
