JavaScript Internationalization with Intl — Quiz

Review

1. What is the primary role of ECMA-402 Intl services?

   Intl provides standardized locale-sensitive services.
2. Which constructor formats numbers?

   Intl.NumberFormat is the standard number-formatting service.
3. Which option selects currency style?

   style:"currency" selects currency presentation.
4. Which service formats Date values for presentation?

   Intl.DateTimeFormat formats dates and times.
5. What does Intl.Collator provide?

   Collator provides locale-aware comparison behavior.
6. What does Intl.ListFormat produce?

   ListFormat formats lists according to locale conventions.
7. What does Intl.PluralRules.select return?

   It returns a locale-dependent plural category.
8. What does Intl.RelativeTimeFormat format?

   It formats numeric offsets and units as localized relative-time expressions.
9. What does Intl.Locale represent?

   Intl.Locale represents a locale identifier structurally.
10. What does supportedLocalesOf do?

    It returns supported requested locale identifiers.
11. Why use formatToParts?

    It exposes structured parts for custom presentation.
12. What does resolvedOptions return?

    It reports effective options such as locale and numbering system.
13. What can DisplayNames localize?

    DisplayNames maps standardized codes to localized display names.
14. What does Segmenter help with?

    Segmenter supports locale-sensitive segmentation.
15. How should newer Intl services be used when unavailable?

    Capability detection prevents unsupported APIs from being assumed.
16. Should Intl formatting mutate application data?

    Keep semantic data intact and localize it when presenting it.