File System Access 批量权限校验与错误恢复策略

概述批量写入前需统一权限校验并准备恢复策略。本文提供封装与错误处理实践。批量校验与写入async function requestRW(handle) { if (typeof handle.requestPermission === 'function') { const s = await handle.requestPermission({ mode: 'readwrite' }); return s === 'granted'; } return true; } async function ensureAllPermissions(handles) { for (const h of handles) { const ok = await requestRW(h); if (!ok) throw new Error('permission denied'); } } async function writeBatch(entries) { try { await ensureAllPermissions(entries.map(e => e.handle)); for (const e of entries) { const w = await e.handle.createWritable(); await w.write(e.bytes); await w.close(); } } catch (err) { // 记录失败项并重试或提示用户重新授权 } }