The built-in Date object is flawed due to confusing constructors, mutability, and unreliable timezone and daylight saving time handling.
Applications require distinct representations for an exact point in time, a time within a specific timezone, and a plain date or time without timezone context.
Libraries like Moment.js and Luxon introduce issues such as large bundle sizes, external dependency management, and do not solve all conceptual problems.
The Temporal API is a modern, native solution for dates and times that is immutable, type-safe, ISO 8601 compliant, and uses a fail-fast approach.
Temporal has progressed through the TC39 process to become part of the ECMAScript standard and is now natively supported in major browsers and runtimes.
Temporal provides specific objects for different needs, including Instant, ZonedDateTime, PlainDate, PlainTime, PlainDateTime, and Duration.
Use the `Temporal.now` object for the current time and the `.from()` factory methods to reliably parse ISO 8601 strings into the correct Temporal types.
Unlike the legacy Date object, Temporal throws errors on ambiguous inputs, such as conflicting timezone and offset information, to ensure data integrity.
Temporal objects are immutable and provide methods for formatting (`toLocaleString`), arithmetic (`add`, `subtract`), and comparison (`compare`, `equals`).
Learn about edge cases like adding variable-length units to an Instant and see how Temporal supports different calendar systems beyond the standard ISO calendar.
Benchmarks show that the native Temporal API is significantly faster and results in a much smaller bundle size compared to popular libraries like Moment.js and Luxon.
Migrate to Temporal incrementally by using polyfills for older browsers, carefully selecting the correct data types, and building temporary conversion bridges.
Migrating a medium-sized Angular application from Luxon to Temporal took about one week and uncovered a critical bug related to timezone interpretation.
While powerful, Temporal is intentionally verbose, lacks convenience helpers like `endOfDay`, and does not parse non-ISO string formats by design.
Jobs that call for the skills explored in this talk.