element-plus/docs/examples/slider/show-marks.vue

<template>
  <div class="slider-demo-block">
    <el-slider v-model="value" range :marks="marks" />
  </div>
</template>

<script lang="ts" setup>
import { reactive, ref } from 'vue'
import type { CSSProperties } from 'vue'

interface Mark {
  style: CSSProperties
  label: string
}

type Marks = Record<number, Mark | string>

const value = ref([30, 60])
const marks = reactive<Marks>({
  0: '0°C',
  8: '8°C',
  37: '37°C',
  50: {
    style: {
      color: '#1989FA',
    },
    label: '50%',
  },
})
</script>
<style scoped>
.slider-demo-block {
  display: flex;
  align-items: center;
}
.slider-demo-block .el-slider {
  margin-top: 0;
  margin-left: 12px;
}
</style>