File System Access 随机读写与截断实践

概述随机写入与截断可避免重写全文件。本文提供最小示例。随机写入与截断async function randomWrite() {

const handle = await window.showSaveFilePicker({ suggestedName: 'data.bin' });

const ws = await handle.createWritable();

await ws.seek(10);

await ws.write(new Uint8Array([1,2,3]));

await ws.truncate(64);

await ws.close();

}