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CSSのみで作るアコーディオンメニュー

Last updated at Posted at 2021-11-08

アコーディオンメニュー

sample.html
<html>
<head>
<style>
.accordion {
	margin: 0px;
}
.acd-check {
	display: none;
}
.option {
	position: relative;
}
/* アコーディオンCLOSE */
.acd-label,
.acd-content {
	-webkit-backface-visibility: hidden;
	backface-visibility: hidden;
	transform: translateZ(0);
	transition: all 0.1s;
}
.acd-label {
	font-size: 0.9em;
	border: solid 1px #ffffff;
	padding-top: 0.5em;
	padding-left: 1em;
	padding-bottom: 0.5em;
	padding-right: 0em;
	display: block;
	color: #ffffff;
	background-color: #4682B4;
	font-weight: bold;
}
/* プラマイ切り替え */
.acd-label::after,
.acd-label::before {
	content: "";
	position: absolute;
	right: 1em;
	top: 0.8em;
	width: 2px;
	height: 0.75em;
	background-color: #FFFFFF;
	transition: all 0.1s;
}
.acd-label::after {
	transform: rotate(90deg);
}
.acd-content {
	max-height: 0;
	overflow: hidden;
	background-color: #CCCCCC;
}
.acd-content p {
	margin: 0;
	padding-left: 1em;
	padding-top: 0.5em;
	padding-bottom: 0.5em;
	padding-right: 0em;
	font-size: 0.7em;
	line-height: 1.5;
}
/* アコーディオンOPEN */
.acd-check:checked + .acd-label + .acd-content {
	max-height: 500px;
	transition: all 1.5s;
}
.acd-check:checked + .acd-label::before {
	transform: rotate(90deg) !important;
}
</style>
</head>
<body>
<div>
<div style="width:250px;">
	<form>
		<div class="accordion">
			<div class="option">
				<input type="checkbox" id="acd-label1" class="acd-check" />
				<label class="acd-label" for="acd-label1">メニュー1</label>
				<div class="acd-content">
					<p><a href="#">コンテンツ1</a></p>
					<p><a href="#">コンテンツ2</a></p>
					<p><a href="#">コンテンツ3</a></p>
					<p><a href="#">コンテンツ4</a></p>
					<p><a href="#">コンテンツ5</a></p>
				</div>
			</div>

			<div class="option">
				<input type="checkbox" id="acd-label2" class="acd-check" />
				<label class="acd-label" for="acd-label2">メニュー2</label>
				<div class="acd-content">
					<p><a href="#">コンテンツ6</a></p>
				</div>
			</div>

			<div class="option">
				<input type="checkbox" id="acd-label3" class="acd-check" />
				<label class="acd-label" for="acd-label3">メニュー3</label>
				<div class="acd-content">
					<p><a href="#">コンテンツ7</a></p>
				</div>
			</div>
		</div>
	</form>
</div>
</div
</body>
</html>
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