71 lines
1.8 KiB
JavaScript
71 lines
1.8 KiB
JavaScript
const KeyValueDB = {
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dbName: 'kvStorage',
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storeName: 'kvStore',
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async init() {
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return new Promise((resolve) => {
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const request = indexedDB.open(this.dbName, 1);
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request.onupgradeneeded = (e) => {
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const db = e.target.result;
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if (!db.objectStoreNames.contains(this.storeName)) {
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db.createObjectStore(this.storeName);
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}
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};
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request.onsuccess = () => resolve(request.result);
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});
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},
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// 设置值（类似 localStorage.setItem）
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async set(key, value) {
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const db = await this.init();
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return new Promise((resolve) => {
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const tx = db.transaction(this.storeName, 'readwrite');
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tx.objectStore(this.storeName).put(value, key);
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tx.oncomplete = () => resolve();
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});
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},
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// 获取值（类似 localStorage.getItem）
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async get(key) {
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const db = await this.init();
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return new Promise((resolve) => {
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const tx = db.transaction(this.storeName, 'readonly');
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const request = tx.objectStore(this.storeName).get(key);
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request.onsuccess = () => resolve(request.result);
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});
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},
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// 删除值
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async remove(key) {
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const db = await this.init();
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return new Promise((resolve) => {
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const tx = db.transaction(this.storeName, 'readwrite');
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tx.objectStore(this.storeName).delete(key);
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tx.oncomplete = () => resolve();
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});
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},
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// 清空所有
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async clear() {
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const db = await this.init();
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return new Promise((resolve) => {
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const tx = db.transaction(this.storeName, 'readwrite');
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tx.objectStore(this.storeName).clear();
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tx.oncomplete = () => resolve();
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});
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},
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// 获取所有键
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async keys() {
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const db = await this.init();
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return new Promise((resolve) => {
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const tx = db.transaction(this.storeName, 'readonly');
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const store = tx.objectStore(this.storeName);
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const request = store.getAllKeys();
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request.onsuccess = () => resolve(request.result);
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});
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}
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};
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export {KeyValueDB} |