前端全文索引与离线检索：倒排索引持久化

`title: 前端全文索引与离线检索：倒排索引持久化``categories: Web 开发/前端/数据管理``keywords: 倒排索引,全文检索,IndexedDB,离线,检索``description: 在前端构建简化的倒排索引并持久化到 IndexedDB，实现离线搜索能力与快速查询（不依赖第三方库）。`索引结构`docs(id,text)` 与 `index(term -> [docId])`；分词与归一化需根据语言选择策略。插入示例async function addDoc(db, id, text) {

const terms = tokenize(text);

return new Promise((resolve, reject) => {

const tx = db.transaction(['docs','index'], 'readwrite');

tx.objectStore('docs').put({ id, text });

const idx = tx.objectStore('index');

for (const t of terms) {

const r = idx.get(t);

r.onsuccess = () => {

const list = r.result?.list || [];

idx.put({ term: t, list: [...new Set([...list, id])] });

};

}

tx.oncomplete = () => resolve();

tx.onerror = () => reject(tx.error);

});

}