control/src/components/battery.vue

<template>
  <div
    class="electric"
    :class="bgClass"
  >
    <div class="electric-panel">
      <div
        class="electric-panel-remainder"
        :style="{ width: quantity + '%' }"
      />
    </div>
    <div class="electric-berText">
      {{ quantity }}%
    </div>
  </div>
</template>

<script setup lang="ts">
import { computed } from 'vue'

const props = defineProps<{
  quantity: number
}>()
const bgClass = computed(() => {
  if (props.quantity >= 50) {
    return 'success'
  } if (props.quantity >= 20) {
    return 'warning'
  } if (props.quantity >= 1) {
    return 'danger'
  }
  return 'danger'
})
</script>

<style scoped lang="scss">
.electric {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  color: white;

  &-panel {
    box-sizing: border-box;
    width: 25px;
    height: 15px;
    position: relative;
    border: 2px solid #ccc;
    padding: 1px;
    border-radius: 3px;
    margin-right: 5px;

    &::before {
      content: "";
      border-radius: 0 1px 1px 0;
      height: 8px;
      background: #ccc;
      width: 3px;
      position: absolute;
      top: 50%;
      right: -4px;
      transform: translateY(-50%);
      overflow: hidden;
    }

    &-remainder {
      border-radius: 1px;
      position: relative;
      height: 100%;
      width: 0%;
      left: 0;
      top: 0;
      background: #fff;
    }
  }

  &-berText {
    font-size: 15px;
  }
}

.success {
  color: #40d7c1;

  &>div:first-child::before,
  &>div:first-child>div {
    background-color: #40d7c1;
  }

  &>div:first-child {
    border-color: #40d7c1;
  }
}

.warning {
  color: #f90;

  &>div:first-child::before,
  &>div:first-child>div {
    background-color: #f90;
  }

  &>div:first-child {
    border-color: #f90;
  }
}

.danger {
  color: #ed4014;

  &>div:first-child::before,
  &>div:first-child>div {
    background-color: #ed4014;
  }

  &>div:first-child {
    border-color: #ed4014;
  }

}
</style>