D26看YT學 CSS動畫_輸入框2 (完結)

2022 iThome 鐵人賽

DAY 26

自我挑戰組

CSS UI(動畫)相關系列第 26 篇

14th鐵人賽

kypss95120

2022-10-10 15:27:21

376 瀏覽

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接續昨天
https://www.youtube.com/watch?v=BMphVl9suxA

HTML (DIV CLASS的值會用到框架，必須是 inputBox ，不然動畫會失效)

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="utf-8">
	<title>測試</title>
	<link href="C1.css" rel="stylesheet">
</head>
<body>
	<div class="inputBox">
		<input type="text" required="required">
		<span>姓名</span>
	</div>
	<div class="inputBox">
		<input type="text" required="required">
		<span>學號</span>
	</div>
</body>
</html>

CSS

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

*{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Poppins',sans-serif;
}

body{
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
	flex-direction: column;
	gap: 30px;
	background: #121214;
}

.inputBox{
	position: relative;
	width: 250px;
}

.inputBox input{
	width: 100%;
	padding: 10px;
	border: 1px solid rgba(255, 255, 255, 0.25);
	background: #121214;
	border-radius: 5px;
	outline: none;
	color: #FFF;
	color-size: 1em;
	transition: 0.5s;
}

.inputBox span{
	position: absolute;
	left: 0;
	padding: 10px;
	pointer-events: none;
	font-size: 1em;
	color: rgba(255, 255, 255, 0.25);
	text-transform: uppercase;
	transition: 0.5s;
}

.inputBox input:valid ~ span,
.inputBox input:focus ~ span{
	color: #34C9FF;
	transform: translateX(10px) translateY(-7px);
	font-size: 0.65em;
	padding: 0 10px;
	background: #121214;
	border-left: 1px solid #34C9FF;
	border-right: 1px solid #34C9FF;
	letter-spacing: 0.2em;
}

.inputBox:nth-child(2) input:valid ~ span,
.inputBox:nth-child(2) input:focus ~ span{
	background: #34C9FF;
	color: #121214;
	border-radius: 2px;
}

.inputBox input:valid,
.inputBox input:focus{
	border: 1px solid #34C9FF;
}

成果(半透明學號<< 是動畫效果)

今天先這樣，明天找別的