vue composition-api(1.0.0-beta.9) で css module 利用

useCSSModule を利用

<template>
  <div :class="style.title" @click="clickHandler()">{{ title }}</div>
</template>

<script lang="ts">
import { defineComponent, useCSSModule } from '@vue/composition-api';
export default defineComponent({
  props: {
    title: {
      type: String,
      required: true,
    },
  },
  setup: (_, { emit }) => {
    const clickHandler = () => {
      emit('clicked');
    };
    return { clickHandler, style: useCSSModule() };
  },
});
</script>

<style module lang="scss">
.title {
  color: #ffffff;
}
</style>

参考