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Vue3のProviderパターン

Last updated at Posted at 2023-04-20

Vue3のProviderパターンは、typescript環境は結構見かけたのだが
javascript環境でのはあまり見つからず、
試しに作ったローディングスピナーをメモとして残しておく

ちなみにLoadingSpinner.vueのCSSはタグだけ書いて
chatGPTにCSSだけいいように出力してもらったものなので注意

ディレクトリ構成

├ components
| └ LoadingSpinner
|    ├ LoadingSpinner.vue
|    └ loadingStore.js
├ App.vue
└ Chilled.vue

各ファイルのソース

LoadingSpinner.vue
<template>
    <div v-if="store.isActive() === true">
        <div id="loading-overlay" class="loading-overlay">
            <div class="loading-spinner"></div>
        </div>
    </div>
</template>

<script setup>
import {inject} from 'vue'

import {key} from "./loadingStore.js"
const store = inject(key);

</script>
<style scoped>

/* ローディングスピナーとオーバーレイのスタイル */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
}

.loading-spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    -webkit-animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@-webkit-keyframes spin {
    to {
        -webkit-transform: rotate(360deg);
    }
}
</style>
loadingStore.js
import {ref} from 'vue'

const state = ref(false)
const hide = () => {
    state.value = false;
};

const show = () => {
    state.value = true;
};

const isActive = () => {
    return state.value;
};

export const store = {
    state,
    hide,
    show,
    isActive
}

export const key = Symbol('LoadingSpinner')
App.vue
<template>
    <div>
        <Chilled></Chilled>
        <LoadingSpinner/>
    </div>
</template>

<script setup>
import {provide} from "vue";
import Chilled from './Chilled.vue'
import LoadingSpinner from './components/LoadingSpinner/LoadingSpinner.vue'
import {key, store} from './components/LoadingSpinner/loadingStore'

provide(key, store);

</script>

<style scoped>

</style>
Chilled.vue
<template>
    <div>
        <button @click="handleClick">ローディング</button>
    </div>
</template>

<script setup>
import {inject} from 'vue';
import {key} from './components/LoadingSpinner/loadingStore'

const loadingStore = inject(key);
const sleep = (second) => new Promise(resolve => setTimeout(resolve, second * 1000))

const handleClick = async () => {
    loadingStore.show();
    await sleep(2);      //2秒間だけsleep
    loadingStore.hide();
}

defineExpose({
    handleClick
});
</script>
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