File System Access 文本差异对比与安全合并实践

概述在编辑器与数据同步场景下需要安全合并。本文提供最小差异对比与合并写入示例。差异与合并async function diffAndMerge() { const [aH] = await window.showOpenFilePicker(); const a = await (await aH.getFile()).text(); const [bH] = await window.showOpenFilePicker(); const b = await (await bH.getFile()).text(); const merged = mergeLines(a, b); const dst = await window.showSaveFilePicker({ suggestedName: 'merged.txt' }); const ws = await dst.createWritable(); await ws.write(new Blob([merged], { type:'text/plain' })); await ws.close(); } function mergeLines(a, b) { const set = new Set(a.split('\n')); for (const line of b.split('\n')) set.add(line); return Array.from(set).join('\n'); }