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[Vue] Propsに独自の型を設定したいときにやること

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結論

PropType<CustomClass>を使えば良い
これで型補完が使えるようになる

実装例

Taskを外部から読み込み、propsに設定すると以下のようになる。

<script lang="ts">
import { defineComponent, PropType, ref } from 'vue'
import { Task } from 'custom-types';
export default defineComponent({ 
    props: {
        task: {
            type: Object as PropType<Task>,
            required: true
        }
    },
    setup() {
    },
})
</script>
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