DIYgod/RSSHub · error · Error

missing next data

Error message

missing next data

What it means

Thrown by the League of Legends patch-notes handler when the scraped LOL news page contains no <script id="__NEXT_DATA__"> element. The handler relies entirely on that Next.js data island to get the patch list (JSON.parse(nextData).props.pageProps.page.blades[2].items); without it, there is nothing to render.

Source

Thrown at lib/routes/leagueoflegends/patch-notes.ts:30

        {
            source: ['www.leagueoflegends.com/en-us/news/tags/patch-notes/', 'www.leagueoflegends.com/en-us/news/game-updates/:postSlug'],
        },
    ],
    name: 'Patch Notes',
    maintainers: ['noahm'],
    async handler() {
        const url = 'https://www.leagueoflegends.com/en-us/news/tags/patch-notes/';
        const response = await got({
            method: 'get',
            url,
        });

        const data = response.data;

        const $ = load(data);
        const nextData = $('script[id="__NEXT_DATA__"]').text();
        if (!nextData) {
            throw new Error('missing next data');
        }
        const list: PatchNotesItem[] = JSON.parse(nextData).props.pageProps.page.blades[2].items;

        return {
            title: 'League of Legends Patch Notes',
            link: url,
            item: list.map((item): DataItem => ({
                title: item.title,
                description: item.description.body,
                pubDate: parseDate(item.publishedAt),
                link: item.action.payload.url,
                guid: item.analytics.contentId,
                image: item.media.url,
                itunes_item_image: item.media.url,
            })),
        };
    },
};

View on GitHub (pinned to bed535e087)

Solutions

1. Open the URL in an incognito browser, view-source, and confirm whether id="__NEXT_DATA__" still exists
2. If renamed, update the selector in lib/routes/leagueoflegends/patch-notes.ts:28 (e.g. to __APP_DATA__)
3. If the page now renders client-side only, switch to Puppeteer/Playwright (requirePuppeteer) so the script is populated
4. Add a real User-Agent via got headers in case the missing data is from a bot-filtered response

Example fix

// before
const nextData = $('script[id="__NEXT_DATA__"]').text();
if (!nextData) {
    throw new Error('missing next data');
}
// after — try both Next.js data island shapes
const nextData = $('script[id="__NEXT_DATA__"]').text() || $('script[id="__APP_DATA__"]').text();
if (!nextData) {
    throw new Error('missing next/app data — LOL site may have migrated; check selectors');
}

async function hasNextData(url: string): Promise<boolean> {
  const resp = await got({ method: 'get', url });
  const $ = load(resp.data);
  return $('script[id="__NEXT_DATA__"]').text().length > 0 || $('script[id="__APP_DATA__"]').text().length > 0;
}

interface NextDataEnvelope { props?: { pageProps?: { page?: { blades?: { items?: unknown[] }[] } } } }
function hasNextDataShape(v: unknown): v is NextDataEnvelope {
  const blades = (v as NextDataEnvelope)?.props?.pageProps?.page?.blades;
  return Array.isArray(blades) && blades.length > 2 && Array.isArray(blades[2]?.items);
}

try { return await handler(); }
catch (e) {
  if (e instanceof Error && e.message === 'missing next data') {
    // likely SSR migrated or bot-filtered — retry with a real UA, then advise enabling Puppeteer
    throw new Error('LOL patch notes: __NEXT_DATA__ missing — site migrated or request was bot-filtered');
  }
  throw e;
}

When it happens

Trigger: GET https://www.leagueoflegends.com/en-us/news/tags/patch-notes/ returns HTML but the __NEXT_DATA__ script is absent — because riotgames migrated away from Next.js, changed the script id, rendered client-side only (cheerio/load cannot execute JS), or returned an anti-bot/consent page instead of the real content.

Common situations: Site rebuild removing/renaming __NEXT_DATA__; consent/region-redirect page intercepting the request; the data moved to a different blade index or a different data island (e.g. __APP_DATA__); got() received a non-HTML body.

Related errors

• 无法从页面中获取到帖子ID，可能网站结构已变更
• 请填入合法的用户 id，参见用户排名 https://www.jisilu.cn/users/
• Build ID not found.
• 无法解析页面数据，请检查杂志 ID 是否正确或页面结构是否变动
• 无法解析页面 Props 数据

AI-assisted analysis of DIYgod/RSSHub@bed535e087 (2026-08-12). Data as JSON: /api/errors/8e3fc4d13b9a548e. Report an issue: GitHub.