import { WebSocket } from 'ws';
const list = await (await fetch('http://127.0.0.1:9222/json/list')).json();
const page = list.find(t => t.type === 'page');
if (!page) { console.log('no page'); process.exit(1); }
const ws = new WebSocket(page.webSocketDebuggerUrl);
let id = 0; const pend = new Map();
const send = (method, params = {}) => new Promise(res => { const i = ++id; pend.set(i, res); ws.send(JSON.stringify({ id: i, method, params })); });
await new Promise(r => ws.on('open', r));
ws.on('message', d => { const m = JSON.parse(d); if (m.id && pend.has(m.id)) { pend.get(m.id)(m.result); pend.delete(m.id); } });
// 388x844 ≈ 1008/2.6（同比例窄屏）
await send('Emulation.setDeviceMetricsOverride', { width: 430, height: 932, deviceScaleFactor: 2, mobile: true });
await send('Page.navigate', { url: 'http://127.0.0.1:5173/' });
await new Promise(r => setTimeout(r, 4000));
const { data } = await send('Page.captureScreenshot', { format: 'png' });
const fs = await import('node:fs');
fs.writeFileSync('/tmp/webui-narrow.png', Buffer.from(data, 'base64'));
console.log('已截图 /tmp/webui-narrow.png');
ws.close();