vueで関数の戻り値の計算を実装する方法

<code class="js">const MyComponent = {
  computed: {
    calculatedValue() {
      return computeFunction(this.someReactiveData)
    }
  }
}</code>

<code class="js">const MyComponent = {
  methods: {
    calculateValue() {
      this.calculatedValue = computeFunction(this.someReactiveData)
    }
  },
  data() {
    return {
      calculatedValue: null,
    }
  }
}</code>

<code class="html"><template>
  {{ computeFunction(someReactiveData) }}
</template></code>