IndexedDB 批量事务分批写入与进度反馈实践

概述批量写入应分批处理以降低事务压力。本文给出分批策略与进度回调示例。分批写入与进度function openDB(name) { return new Promise((resolve, reject) => { const r = indexedDB.open(name, 1); r.onupgradeneeded = () => { const db = r.result; if (!db.objectStoreNames.contains('items')) db.createObjectStore('items', { keyPath: 'id' }); }; r.onsuccess = () => resolve(r.result); r.onerror = () => reject(r.error); }); }

async function bulkPutBatched(records, batch = 500, onProgress) {

const db = await openDB('batchdb');

let done = 0;

for (let i = 0; i < records.length; i += batch) {

const slice = records.slice(i, i + batch);

const tx = db.transaction('items', 'readwrite');

const store = tx.objectStore('items');

for (const r of slice) store.put(r);

await new Promise((resolve, reject) => { tx.oncomplete = resolve; tx.onerror = () => reject(tx.error); tx.onabort = () => reject(tx.error); });

done += slice.length; onProgress && onProgress(done, records.length);

}

db.close();

}