frontend/src/components/HelloWorld.vue

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<template>
  <div class="hello">欢迎加入IoTDB前端开发</div>
</template>

<script>
export default {
  name: 'HelloWorld',
  props: {},
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="scss">
.hello {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
</style>