Temporal API example for WebExpo talk

temporal.ts

const talkStart = Temporal.ZonedDateTime.from({
  timeZone: `Europe/Prague`,
  year: 2025,
  month: 5,
  day: 28,
  hour: 2,
  minute: 20,
})

console.assert(talkStart.toString() === `2025-05-28T02:20:00+02:00[Europe/Prague]`)

console.assert(talkStart.toInstant().toString() === `2025-05-28T00:20:00Z`)

console.assert(
  talkStart.withTimeZone("America/Los_Angeles").toString() ===
    `2025-05-27T17:20:00-07:00[America/Los_Angeles]`,
)

const talkEnd = talkStart.add({ minutes: 20 })

console.assert(talkEnd.toString() === `2025-05-28T02:40:00+02:00[Europe/Prague]`)