我们可以在 Nested.svelte
中轻松地为 props 指定默认值:
Nested
<script>
let { answer = 'a mystery' } = $props();
</script>
<script lang="ts">
let { answer = 'a mystery' } = $props();
</script>
现在,如果我们添加第二个组件,但不指定 answer
属性,它将使用默认值:
App
<Nested answer={42}/>
<Nested />
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<script>
import Nested from './Nested.svelte';
</script>
<Nested answer={42} />