纯CSS实现圆形进度条

在css3中为我们提供了背景渐变（gradients）属性，通过这个属性我们可以实现多个颜色的平滑过渡。常使用的渐变方式有：线性渐变linear-gradients和径向渐变radial-gradients，这里使用的不是这两种方式而是圆锥渐变conic-gradient，圆锥渐变的效果如下：

demo1 demo2 demo3

实现代码：

background: conic-gradient(red, orange, yellow, green, blue);
background: conic-gradient( 
     red 6deg, orange 6deg 18deg, yellow 18deg 45deg, 
     green 45deg 110deg, blue 110deg 200deg, purple 200deg);
background: conic-gradient(from 3.1416rad at 10% 50%, #e66465, #9198e5);

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conic-gradient接收多个参数，首个参数为from a to b（可缺省），a代表颜色起始角度、b代表中心点位置（百分比或px），后面跟若干个颜色值，颜色值可以搭配所占角度或百分比根据上面的原理，如果只存在两种颜色并以圆环截取其中内容就会得到进度条

demo4 demo5

代码如下：

<template>
	<div class="con">
		<!-- 定义data-value用于css中content变量使用 -->
		<div class="circle" :data-value="value" :style="{background: 'conic-gradient(rgba(0,255,255,1) ' + percent + ', rgba(0,255,255,.2) 0)'}"></div>
		<div class="options">
			<div class="add" @click="value < 100 && value++">+</div>
			<div class="sub" @click="value > 0 && value--">-</div>
		</div>
	
	</div>
</template>

<script>
	export default {
		data() {
			return {
				value: 10,
				total: 100,
			}
		},
		computed: {
			percent() {
				return ((this.value / this.total) * 100).toFixed(2) + '%'
			}
		}
	}
</script>

<style scoped lang="scss">
	.con {		
		display: flex;
		flex-direction: row;
		align-items: center;
		
		.circle {
			position: relative;
			width: 100px;
			height: 100px;
			border-radius: 50%;
			transition: .3s linear;
			
			&::before {
				content: attr(data-value);
				position: absolute;
				left: 0;
				top: 0;
				right: 0;
				bottom: 0;
				margin: auto;
				display: flex;
				align-items: center;
				justify-content: center;
				width: 90px;
				height: 90px;
				border-radius: 50%;
				background: white;
			}
		}
		
		.circle-no-blank {
			position: relative;
			width: 100px;
			height: 100px;
			margin: 0 30px;
			border-radius: 50%;
			transition: .3s linear;
		}
		
		.circle-concentric {
			position: relative;
			width: 100px;
			height: 100px;
			margin: 0 30px;
			border-radius: 50%;
			transition: .3s linear;
		}
		
		.options {
			display: flex;
			flex-direction: column;
			align-items: center;
			justify-content: space-around;
			height: 100px;
			margin-left: 20px;
			.add,.sub {
				width: 25px;
				height: 25px;
				line-height: 25px;
				text-align: center;
				border: 1px solid #999999;
				border-radius: 50%;
				cursor: pointer;
			}
		}
	}
	
</style>

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简单修改上面代码，将纯色进度变为渐变进度：

<div class="circle" :data-value="value" :style="{background: 'conic-gradient(rgba(0,255,255,1), rgba(0,255,255,0) ' + percent + ', rgba(0,255,255,.2) ' + percent + ')'}"></div>

上次更新: 2025/09/05, 8:09:00

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