复选框动画

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html

css

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html

<form>
	<div class="checkbox-group">
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="desktop" value="desktop" data-top>
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<strong class="checkbox-text">Desktop Macs</strong>
		</label>
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="desktop" value="mac_mini">
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<span class="checkbox-text">Mac Mini</span>
		</label>
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="desktop" value="mac_studio">
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<span class="checkbox-text">Mac Studio</span>
		</label>
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="desktop" value="mac_pro">
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<span class="checkbox-text">Mac Pro</span>
		</label>
	</div>
	<div class="checkbox-group">
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="laptop" value="macbooks" data-top>
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<strong class="checkbox-text">MacBooks</strong>
		</label>
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="laptop" value="macbook_pro_13-inch">
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<span class="checkbox-text">MacBook Pro 13"</span>
		</label>
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="laptop" value="macbook_pro_14-inch">
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<span class="checkbox-text">MacBook Pro 14"</span>
		</label>
		<label class="checkbox-label">
			<input class="checkbox" type="checkbox" name="laptop" value="macbook_pro_16-inch">
			<svg class="check-icon" width="24px" height="24px" viewBox="0 0 24 24">
				<g fill="none" stroke-linecap="round" stroke-linejoin="round" stroke-width="2">
					<rect class="check-icon__box" x="1" y="1" width="22" height="22"/>
					<polyline class="check-icon__box-worm" points="23,1 1,1 1,23 23,23 23,4" stroke-dasharray="30 146" stroke-dashoffset="30"/>
					<polyline class="check-icon__check-worm" points="23,4 10,17 5,12 18,12" stroke-dasharray="17.38 149.68" stroke-dashoffset="103.38"/>
				</g>
			</svg>
			<span class="checkbox-text">MacBook Pro 16"</span>
		</label>
	</div>
</form>

css

* {
	border: 0;
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
:root {
	--hue: 223;
	--bg: hsl(var(--hue),10%,90%);
	--fg1: hsl(var(--hue),10%,10%);
	--fg2: hsl(var(--hue),10%,30%);
	--fg3: hsl(var(--hue),10%,70%);
	--primary: hsl(var(--hue),90%,55%);
	--primary-t: hsla(var(--hue),90%,55%,0);
	--primary-t-hover: hsla(var(--hue),90%,55%,0.15);
	--trans-dur1: 0.3s;
	--trans-dur2: 0.9s;
	font-size: calc(16px + (24 - 16) * (100vw - 320px) / (1280 - 320));
}
body,
input {
	font: 1em/1.5 "DM Sans", sans-serif;
}
body {
	background-color: #e9ffed;
	color: var(--fg2);
	height: 100vh;
	display: grid;
	place-items: center;
	transition:
		background-color var(--trans-dur1),
		color var(--trans-dur1);
}
form {
	min-width: 16em;
	padding: 1.5em 1.5em 0 1.5em;
}
.checkbox-label {
	display: flex;
	align-items: center;
	padding: 0.375em;
	position: relative;
	-webkit-user-select: none;
	user-select: none;
	-webkit-tap-highlight-color: transparent;
}
.checkbox-label + .checkbox-label {
	margin-left: 2em;
}

/* Default */
.checkbox-group {
	margin-bottom: 1.25em;
}
.checkbox {
	position: absolute;
	clip: rect(1px,1px,1px,1px);
	width: 1px;
	height: 1px;
}
.checkbox-text {
	color: var(--fg1);
	transition: color var(--trans-dur1);
}
.checkbox-text:after {
	background-color: var(--primary-t);
	border-radius: 0.375em;
	content: "";
	display: block;
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: -1;
	transition: background-color 0.15s linear;
}
.check-icon {
	margin-right: 0.5em;
	width: 1.5em;
	height: 1.5em;
}
.check-icon__box {
	stroke: var(--fg3);
	transition: stroke var(--trans-dur1);
}
.check-icon__box-worm,
.check-icon__check-worm {
	stroke: var(--primary);
	transition:
		stroke var(--trans-dur1),
		stroke-dashoffset var(--trans-dur2) cubic-bezier(0.42,-0.2,0.58,1.2);
}

/* Focus and hover */
.checkbox:focus ~ .checkbox-text:after,
.checkbox:hover ~ .checkbox-text:after {
	background-color: var(--primary-t-hover);
}
.checkbox:checked + .check-icon .check-icon__box-worm,
.checkbox:indeterminate + .check-icon .check-icon__box-worm {
	stroke-dashoffset: -91;
}
.checkbox:checked + .check-icon .check-icon__check-worm {
	stroke-dashoffset: -6;
}
.checkbox:indeterminate + .check-icon .check-icon__box-worm {
	stroke-dashoffset: -111.38;
}
.checkbox:indeterminate + .check-icon .check-icon__check-worm {
	stroke-dashoffset: -26.38;
}

/* `:focus-visible` support */
@supports selector(:focus-visible) {
	.checkbox:focus ~ .checkbox-text:after {
		background-color: var(--primary-t);
	}
	.checkbox:focus-visible ~ .checkbox-text:after,
	.checkbox:hover ~ .checkbox-text:after {
		background-color: var(--primary-t-hover);
	}
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
	:root {
		--bg: hsl(var(--hue),10%,10%);
		--fg1: hsl(var(--hue),10%,90%);
		--fg2: hsl(var(--hue),10%,70%);
		--fg3: hsl(var(--hue),10%,30%);
		--primary: hsl(var(--hue),90%,65%);
		--primary-t-hover: hsla(var(--hue),90%,55%,0.3);
	}
}

JavaScript

window.addEventListener("DOMContentLoaded",() => {
	const checklist = new Checklist("form");
});

class Checklist {
	constructor(qs) {
		this.el = document.querySelector(qs);
		this.el?.addEventListener("change",this.checkForSelected.bind(this));
		this.init();
	}
	init() {
		const inputs = this.el.querySelectorAll("input");
		Array.from(inputs).forEach(el => {
			el.checked = false;
		});
	}
	checkForSelected(e) {
		const tar = e.target;
		const isTop = tar.hasAttribute("data-top");

this.updateChecks(tar.name,isTop);
	}
	updateChecks(name,isTop) {
		if (name) {
			const topCheck = this.el.querySelector(`[name="${name}"][data-top]`);
			const checkItems = this.el.querySelectorAll(`[name="${name}"]:not([data-top])`);
			const checked = Array.from(checkItems).filter(el => el.checked);
			const notAllChecked = checked.length < checkItems.length;

if (isTop) {
				Array.from(checkItems).forEach(el => {
					el.checked = notAllChecked;
				});
			} else {
				topCheck.checked = !notAllChecked;
				topCheck.indeterminate = checked.length > 0 && notAllChecked;
			}
		}
	}
}

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