ant-design-vue/components/slider/demo/icon-slider.md

<cn>
#### 带 icon 的滑块
滑块左右可以设置图标来表达业务含义。
</cn>

<us>
#### Slider with icon
You can add an icon beside the slider to make it meaningful.
</us>

```html
<template>
  <div class="icon-wrapper">
    <a-icon :style="{color: preColor}" type="frown-o" />
    <a-slider :min="0" :max="20" @change="handleChange" :value="value" />
    <a-slider :min="0" :max="20" v-model="value" />
    <a-icon :style="{color: nextColor}" type="smile-o" />
  </div>
</template>
<script>
  export default {
    data() {
      return {
        value: 0,
        min: 0,
        max: 20,
      };
    },
    methods: {
      handleChange(value) {
        this.value = value;
      },
    },
    computed: {
      preColor() {
        const { max, min, value } = this;
        const mid = ((max - min) / 2).toFixed(5);
        return value >= mid ? '' : 'rgba(0, 0, 0, .45)';
        const nextColor = value >= mid ? 'rgba(0, 0, 0, .45)' : '';
      },
      nextColor() {
        const { max, min, value } = this;
        const mid = ((max - min) / 2).toFixed(5);
        return value >= mid ? 'rgba(0, 0, 0, .45)' : '';
      },
    },
  };
</script>
<style scoped>
  .icon-wrapper {
    position: relative;
    padding: 0px 30px;
  }

  .icon-wrapper .anticon {
    position: absolute;
    top: -2px;
    width: 16px;
    height: 16px;
    line-height: 1;
    font-size: 16px;
    color: rgba(0, 0, 0, 0.25);
  }

  .icon-wrapper .anticon:first-child {
    left: 0;
  }

  .icon-wrapper .anticon:last-child {
    right: 0;
  }
</style>
```