jackwener/OpenCLI · error · CommandExecutionError

Trip.com car cards rendered but parser did not find…

Error message

Trip.com car cards rendered but parser did not find required price anchors

What it means

The Trip.com car-hire command's in-page extractor ran successfully but returned an empty array: car cards were present on the page, yet none of them contained the price anchors the parser requires. The CLI treats a rendered-but-unparseable grid as markup drift rather than an empty result, so it throws CommandExecutionError instead of returning [].

Solutions

  1. Retry the search after a short delay to rule out a partially rendered or cached page
  2. Update the Trip.com session/cookies (complete any verification in the browser session) and retry
  3. Inspect buildCarExtractJs()'s price-anchor selectors against current Trip.com car card markup and update them
  4. Check for a newer version of the CLI package that already tracks the markup change

Example fix

// before
if (raw.length === 0) {
    throw new CommandExecutionError('Trip.com car cards rendered but parser did not find required price anchors');
}
// after
if (raw.length === 0) {
    throw new CommandExecutionError('Trip.com car cards rendered but parser did not find required price anchors');
}
// Long-term: in buildCarExtractJs, add a fallback price selector
// const price = card.querySelector('.price-text') ?? card.querySelector('[data-price]');
Defensive patterns

Strategy: retry

Validate before calling

// Pre-check rendered car cards before expecting parseable rows
const cardCount = await page.evaluate(() => document.querySelectorAll('[class*=car-card], [data-car-id]').length);
if (cardCount > 0) console.warn(`${cardCount} car cards rendered; verify price anchors still exist in markup`);

Type guard

function isExtractRows(v) {
    return Array.isArray(v) && v.every(r => r && typeof r === 'object' && 'category' in r);
}

Try / catch

try {
    const cars = await runTripCarSearch(opts);
} catch (e) {
    if (e instanceof CommandExecutionError && /price anchors/.test(e.message)) {
        // markup drift: retry once, then surface a 'site markup changed' alert
    } else { throw e; }
}

Prevention

When it happens

Trigger: Running the Trip.com car search when the page renders car cards but the extractor's price-selector (the required price anchor inside each card) matches nothing, so buildCarExtractJs() filters every row out and returns [].

Common situations: Trip.com A/B-testing new card markup; a site redesign changing price element classes/data attributes; regional layouts that omit the price anchor; stale cached HTML; bot-interstitial pages that render card skeletons without prices.

Related errors

AI-assisted analysis of jackwener/OpenCLI@49907e53dc (2026-08-29). Data as JSON: /api/errors/fc72f1ddcc2dc377. Report an issue: GitHub.

Appendix: source

Thrown at clis/trip/car.js:62

        const listUrl = buildCarListUrl(cityId);
        await page.goto(listUrl);
        const waitResult = await page.evaluate(WAIT_FOR_CARS_JS);
        if (waitResult === 'captcha') {
            throw new AuthRequiredError('trip.com', 'Trip.com is asking for a verification; complete it in your browser session and retry');
        }
        if (waitResult === 'empty') {
            throw new EmptyResultError('trip car', `No car rentals for city id ${cityId}`);
        }
        if (waitResult !== 'content') {
            throw new CommandExecutionError(`Trip.com car listing did not render (state=${String(waitResult)}); check the carhire city id`);
        }
        const raw = await page.evaluate(buildCarExtractJs());
        if (!Array.isArray(raw)) {
            throw new CommandExecutionError('Trip.com car DOM extraction returned malformed rows');
        }
        if (raw.length === 0) {
            throw new CommandExecutionError('Trip.com car cards rendered but parser did not find required price anchors');
        }
        return raw.slice(0, limit).map((r, i) => ({
            rank: i + 1,
            category: r.category,
            vehicle: r.vehicle,
            seats: r.seats,
            price: r.price,
            currency: r.currency,
            url: listUrl,
        }));
    },
});

View on GitHub (pinned to 49907e53dc)