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vue2+element项目，通过伪类实现el-slider组件Tooltip永久显示，以及滑块滑动区分色块效果

伪类，el-slider组件，Tooltip永久显示，Tooltip，el-slider，滑块滑动效果，vue2,elementui

coderDeng

3055人浏览 · 2023-04-19 23:13:50

coderDeng · 2023-04-19 23:13:50 发布

前言

效果
默认效果：

滑动效果：
实现功能

1.滑块上方一直显示当前值大小
2.已经分配左侧内容用绿色填充，有侧用灰色填充
3.向右滑动，多出的部分用蓝色填充，向左滑动少于部分用蓝色填充
4.最大值为0的时候滑块位于最右端

接口是用mock模拟，以下是mock接口返回数据

export const sourceIsoliton = Mock.mock({
    "cpu_info":{
        'total_cpu_count|15-20':16.8,
        'used_cpu_count|0-15':6
    },
    'memory_info':{
        'total_memory|15-20':15.19,
        'used_memory|0-15':5
    }
})

如果对您有所帮，希望点赞给予支持，有错误或者有优化的地方，欢迎指正留言，谢谢！

通过伪类实现滑块Tooltip永久显示

原理：给滑块标签添加data-attr属性（属性名可更改），值为当前滑块所在值，在css中使用attr()获取该属性；
代码摘要：

滑块标签属性添加

let sliderButton = document.getElementsByClassName("el-slider__button-wrapper");//滑块

sliderButton[0].setAttribute("data-attr", this.isolation.cpu.val)
sliderButton[1].setAttribute("data-attr", this.isolation.memory.val)

给伪类添加内容，值为上述传递的值

::v-deep .el-slider__button-wrapper::before {
	content: attr(data-attr);// !!内容位置
	position: absolute;
	width: 20px;
	height: 25px;
	line-height: 25px;
	border-radius: 5px;
	text-align: center;
	top: -20px;
	left: 7.5px;
	background: rgb(64, 148, 255);
	color: white;
}

最大值为0的时候滑块位于最右端

原理：将滑块的left值设为100%，滑动路径的width值设为100%
代码摘要：

let sliderBar = document.getElementsByClassName("el-slider__bar");//滑动路径
let sliderButton = document.getElementsByClassName("el-slider__button-wrapper");

// 值为0的时候滑块位于最右端
if (that.isolation.cpu.total == 0) {
	sliderBar[0].style.width = "100%";
	sliderButton[0].style.left = "100%"
}
if (that.isolation.memory.total == 0) {
	sliderBar[1].style.width = "100%";
	sliderButton[1].style.left = "100%"
}

滑动效果实现

原理：滑动过程中给滑动路径加linear-gradient css 样式
代码摘要：

let sliderBar = document.getElementsByClassName("el-slider__bar");
let sliderButton = document.getElementsByClassName("el-slider__button-wrapper");
let sliderRunway = document.getElementsByClassName("el-slider__runway");//底部路径

// 向右滑动颜色变化
let marklength = Number(Object.keys(this.memroyMarks)[0]) / val * 100 + "%";//val：当前值、memroyMark：slider标记；具体请参考完整代码
sliderBar[1].style.background = `linear-gradient(to right, rgb(94, 203, 115) 0%, rgb(94, 203, 115) ${marklength}, rgb(64, 148, 255) ${marklength}, rgb(64, 148, 255) 100%)`;

// 向左滑动颜色变化（给底部添加颜色）
let memoryTotalLength = Number(Object.keys(this.memroyMarks)[0]) / that.isolation.memory.total * 100 + "%";
sliderRunway[1].style.background = `linear-gradient(to right, rgb(64, 148, 255) 0%, rgb(64, 148, 255) ${memoryTotalLength}, #E4E7ED ${memoryTotalLength}, #E4E7ED 100%)`;

.vue完整代码

<template>
	<el-row>
		<el-form :model="isolation" label-width="80px" label-position="left">
			<el-col :span="22" style="position: relative;">
				<el-form-item label="Count">
					<el-slider @input="cpuFunc" :show-tooltip="false" :marks="cpuMarks" v-model="isolation.cpu.val"
						show-input :max="isolation.cpu.total" :min="isolation.cpu.min"></el-slider>
				</el-form-item>
				<el-button class="maxClass" :disabled="true">{{ isolation.cpu.total }}</el-button>
				<el-button class="minClass" :disabled="true">{{ isolation.cpu.min }}</el-button>
			</el-col>
			<el-col :span="22" style="position: relative;">
				<el-form-item label="Match">
					<el-slider @input="memoryFunc" :show-tooltip="false" :marks="memroyMarks"
						v-model="isolation.memory.val" show-input :max="isolation.memory.total"
						:min="isolation.memory.min"></el-slider>
				</el-form-item>
				<el-button class="maxClass" :disabled="true">{{ isolation.memory.total }}</el-button>
				<el-button class="minClass" :disabled="true">{{ isolation.memory.min }}</el-button>
			</el-col>
		</el-form>
	</el-row>
	
</template>
<script>
import API from "@/axios/BMW.js";//mock接口文件位置
export default {
	data() {
		return {
			value:0,
			isolation: {
				cpu: {
					val: 0,
					total: 0,
					min: 0,
				},
				memory: {
					val: 0,
					total: 0,
					min: 0,
				}
			},
			cpuMarks: {
			},
			memroyMarks: {
			},
		}
	},
	computed: {},
	mounted() {
		this.getResource()
	},
	methods: {
		getResource() {
			const that = this;
			let sliderBar = document.getElementsByClassName("el-slider__bar");
			let sliderButton = document.getElementsByClassName("el-slider__button-wrapper");

			// api请求
			API.sourceIsoliton().then(res => {

				that.isolation.cpu.total = Math.floor(res.cpu_info.total_cpu_count);
				that.isolation.cpu.val = Math.floor(res.cpu_info.used_cpu_count);
				that.$set(that.cpuMarks, that.isolation.cpu.val, '已分配' + that.isolation.cpu.val)


				that.isolation.memory.total = Math.floor(res.memory_info.total_memory);
				that.isolation.memory.val = Math.floor(res.memory_info.used_memory);
				that.$set(that.memroyMarks, that.isolation.memory.val, '已分配' + that.isolation.memory.val)

				// 伪类属性添加
				sliderButton[0].setAttribute("data-attr", this.isolation.cpu.val)
				sliderButton[1].setAttribute("data-attr", this.isolation.memory.val)

				// 值为0的时候滑块位于最右端
				if (that.isolation.cpu.total == 0) {
					sliderBar[0].style.width = "100%";
					sliderButton[0].style.left = "100%"
				}
				if (that.isolation.memory.total == 0) {
					sliderBar[1].style.width = "100%";
					sliderButton[1].style.left = "100%"
				}
			}, err => {
				// console.log(err)
			})
		},
		memoryFunc(val) {
			let that = this;
			let sliderBar = document.getElementsByClassName("el-slider__bar");
			let sliderButton = document.getElementsByClassName("el-slider__button-wrapper");
			let sliderRunway = document.getElementsByClassName("el-slider__runway");
			// 提示传参
			sliderButton[1].setAttribute("data-attr", this.isolation.memory.val);

			// 滑动颜色变化
			let marklength = Number(Object.keys(that.memroyMarks)[0]) / val * 100 + "%";
			sliderBar[1].style.background = `linear-gradient(to right, rgb(94, 203, 115) 0%, rgb(94, 203, 115) ${marklength}, rgb(64, 148, 255) ${marklength}, rgb(64, 148, 255) 100%)`;
			// console.log(marklength)
			// 底部颜色
			let memoryTotalLength = Number(Object.keys(that.memroyMarks)[0]) / that.isolation.memory.total * 100 + "%";
			sliderRunway[1].style.background = `linear-gradient(to right, rgb(64, 148, 255) 0%, rgb(64, 148, 255) ${memoryTotalLength}, #E4E7ED ${memoryTotalLength}, #E4E7ED 100%)`;
		},
		cpuFunc(val) {
			let that = this;
			let sliderBar = document.getElementsByClassName("el-slider__bar");
			let sliderButton = document.getElementsByClassName("el-slider__button-wrapper");
			let sliderRunway = document.getElementsByClassName("el-slider__runway");
			// 提示传参
			sliderButton[0].setAttribute("data-attr", this.isolation.cpu.val);

			// 滑动颜色变化
			let cpulength = Number(Object.keys(that.cpuMarks)[0]) / val * 100 + "%";
			sliderBar[0].style.background = `linear-gradient(to right, rgb(94, 203, 115) 0%, rgb(94, 203, 115) ${cpulength}, rgb(64, 148, 255) ${cpulength}, rgb(64, 148, 255) 100%)`;

			// 底部颜色
			let cpuTotalLength = Number(Object.keys(that.cpuMarks)[0]) / that.isolation.cpu.total * 100 + "%";
			sliderRunway[0].style.background = `linear-gradient(to right, rgb(64, 148, 255) 0%, rgb(64, 148, 255) ${cpuTotalLength}, #E4E7ED ${cpuTotalLength}, #E4E7ED 100%)`;
		},
	}
}
</script>
<style lang="less" scoped>
::v-deep .el-slider__button-wrapper::before {
	content: attr(data-attr);// 给伪类添加内容，值为上述传递的值
	position: absolute;
	width: 20px;
	height: 25px;
	line-height: 25px;
	border-radius: 5px;
	text-align: center;
	top: -20px;
	left: 7.5px;
	background: rgb(64, 148, 255);
	color: white;
}
::v-deep .el-slider__marks-text {
	width: 80px;
	text-align: center;
	margin-top: 6px;
}
::v-deep .el-slider__bar {
	height: 15px;
	border-radius: 0;
}
::v-deep .el-slider__marks-stop {
	display: none;
}
::v-deep .el-slider__runway {
	height: 15px;
	border-radius: 0;
}
::v-deep .el-slider__button {
	width: 20px;
	height: 20px;
	margin-top: 7px;
}
::v-deep .el-slider__input {
	margin-top: 5px;
}
::v-deep .el-form-item__label {
	margin-top: 3px;
}
.unit {
	padding-left: 10px;
	line-height: 40px;
}
.minClass,.maxClass{
	width: 20px;
	height: 25px;
	padding: 0;
	line-height: 25px;
	border-radius: 5px;
	position: absolute;
	cursor: default !important;
}
.minClass {
	left: 60px;
	top: -19px;
}
.maxClass {
	right: 150px;
	top: -19px;
}
</style>

结束，谢谢浏览。

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