/
PromisePage.vue
95 lines (88 loc) · 2.31 KB
/
PromisePage.vue
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<script setup lang="ts">
import { ref, computed } from "vue";
import { computedAsync } from "@vueuse/core";
const num = ref(1);
// ❌computedはPromiseを解決しない!
const doublePromise1 = computed(async () => {
return await new Promise((resolve) => {
setTimeout(() => {
resolve(num.value * 2);
}, 3000);
});
});
const evaluating2 = ref(false);
const doublePromise2 = computedAsync(
async () => {
return await new Promise((resolve) => {
setTimeout(() => {
resolve(num.value * 2);
}, 3000);
});
},
"計算中...",
evaluating2
);
/**
* 郵便番号から住所を取得する例です
* 株式会社アイビスの郵便番号検索APIを使用しています:
* https://zipcloud.ibsnet.co.jp/doc/api
*/
const postalCode = ref("");
const evaluating = ref(false);
const ENDPOINT = "https://zipcloud.ibsnet.co.jp/api/search";
const address = computedAsync(
async () => {
const url = `${ENDPOINT}?zipcode=${postalCode.value}`;
if (postalCode.value.length !== 7) {
return "7桁の郵便番号を入力してください";
}
const res = await fetch(url);
const json = await res.json();
const results = json.results;
if (results === null) {
return "住所が見つかりませんでした";
}
const result = results[0];
return result.address1 + result.address2 + result.address3;
},
// 初期値
"",
evaluating
);
</script>
<template>
<div>
<h1>非同期なリアクティブ値のデモ</h1>
<!-- <p>num: {{ num }}</p>-->
<!-- <h2>computedを用いた例</h2>-->
<!-- <p>doublePromise1: {{ doublePromise1 }}</p>-->
<!-- <h2>computedAsyncを用いた例</h2>-->
<!-- <p>-->
<!-- doublePromise2:-->
<!-- <span :class="{ evaluating: evaluating2 }">{{ doublePromise2 }}</span>-->
<!-- </p>-->
<h2>郵便番号から住所を取得する例</h2>
<input type="text" v-model="postalCode" placeholder="7桁の郵便番号を入力" />
<p v-show="evaluating">取得中...</p>
<p v-show="!evaluating">{{ address }}</p>
</div>
</template>
<style scoped lang="scss">
.evaluating {
animation: flash 1s linear infinite;
}
@keyframes flash {
0% {
opacity: 1;
}
50% {
opacity: 1;
}
51% {
opacity: 0;
}
100% {
opacity: 0;
}
}
</style>