[Vue] 번외. css with js

마루님이 MIT로 풀어주신 코드입니다. 메모메모..

<template>
  <div :style="cssVariable">
    <select v-model="color">
      <option value="black">black</option>
      <option>red</option>
      <option>blue</option>
      <option>green</option>
    </select>
    <div class="example-box" />
  </div>
</template>

<script>
import { computed, defineComponent, ref } from "vue";
export default defineComponent({
  name: "App",
  setup() {
    const color = ref("black");
    const cssVariable = computed(() => {
      return {
        "--div-background-color": color.value,
      };
    });

    return {
      color,
      cssVariable,
    };
  },
});
</script>

<style scoped>
.example-box {
  width: 100px;
  height: 100px;
  background-color: var(--div-background-color);
}
</style>