v148 · AI · JavaScript

Safety Harness

A test suite of 12 edge cases: API availability, empty input, emoji-only text, numbers, mixed scripts, very long text, and recovery from unsupported browsers. Run individually or all at once.

Checking Language Detector API availability…

12 Total

0 Pass

0 Fail

0 Warn

Ready. Press "Run all" or run individual tests.

Edge case tests

// Always feature-detect before using the API
async function safeDetect(text) {
  // 1. Check API availability
  if (!('LanguageDetector' in globalThis)) {
    return { error: 'API not supported', fallback: heuristicDetect(text) };
  }
  // 2. Check model readiness
  const availability = await LanguageDetector.availability();
  if (availability === 'unavailable') {
    return { error: 'Model unavailable', fallback: heuristicDetect(text) };
  }
  // 3. Guard empty / too-short text
  if (!text || text.trim().length < 3) {
    return { error: 'Text too short', result: null };
  }
  // 4. Detect with error boundary
  try {
    const detector = await LanguageDetector.create();
    const [top] = await detector.detect(text);
    return { result: top };
  } catch (e) {
    return { error: e.message, fallback: heuristicDetect(text) };
  }
}

references

implementation reference

Need the exact API surface, compatibility boundaries, errors, lifecycle, and source links? Read the matching gendn reference ↗

see also

references

implementation reference