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Common writing methods: Combining <template> and <script>

A more standard way to write it is to separate the template and script, so that the structure is clearer:

 <template>
  <div>{{ message }}</div>
</template>

<script>
export default {
  name: &#39;MyComponent&#39;,
  data() {
    return {
      message: &#39;Hello Vue!&#39;
    }
  }
}
</script>

This method is the most common structure in Vue single file components at present.


Using Composition API writing (Vue 3)

If you are using Vue 3 and enable the Composition API, you can write this:

 <script>
import { ref } from &#39;vue&#39;

export default {
  name: &#39;MyComponent&#39;,
  setup() {
    const message = ref(&#39;Hello Vue 3!&#39;)
    return { message }
  }
}
</script>

Or with <script setup> syntax sugar (more concise):

 <script setup>
import { ref } from &#39;vue&#39;

const message = ref(&#39;Hello Vue 3!&#39;)
</script>

<script setup> is a new method recommended by Vue 3. It does not require manual export default and is exported as a component by default.


Notes and suggestions

  • It is best to use the PascalCase method for component names , such as MyComponent .
  • If you use module packaging tools (such as Webpack or Vite), make sure the .vue file is parsed correctly.
  • Don't forget export default or the component will not take effect.
  • In large projects, it is recommended to split components by function and organize components/ directory structure reasonably.

Basically that's it. The key to declaring a component is to understand the role of export default and how to organize various parts of the component. As long as the structure is clear, the rest is to add logic and styles according to needs.

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