moment-lessTemporal API formatting

Moment.js token syntax for the native Temporal API. Zero dependencies. < 2KB gzipped.

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Familiar Token Syntax

Use the same YYYY-MM-DD, HH:mm:ss, and MMMM Do patterns you already know from Moment.js and date-fns — no new format language to learn.

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Full Temporal Support

Works natively with all Temporal types — PlainDate, PlainDateTime, PlainTime, ZonedDateTime, and Instant. Each type exposes only the tokens that make sense for it.

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Relative Time

fromNow() returns human-readable strings like "3 hours ago" or "in 2 days". Optionally supply your own reference point for deterministic output in tests.

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Calendar Labels

calendar() returns context-aware labels — "Today at 2:05 PM", "Yesterday", "Monday", or "Apr 9, 2026" — exactly like messaging apps do.

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Locale-Aware

Month names, weekday names, and relative phrases all adapt to the requested locale via the built-in Intl APIs. No locale bundles to ship.

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Zero Dependencies

The entire library is a single TypeScript file with no runtime dependencies. It relies only on the Temporal API and Intl, both built into the platform.

Quick Look

import { format, fromNow, calendar, humanizeDuration, fromDate } from 'moment-less'

// Token-based formatting — any Temporal type
const dt = Temporal.PlainDateTime.from('2026-04-09T14:05:00')
format(dt, 'MMMM Do, YYYY [at] h:mm A')
// → "April 9th, 2026 at 2:05 PM"

// Relative time — measured against an Instant
const now = Temporal.Instant.from('2026-04-09T14:00:00Z')
fromNow(now.subtract({ hours: 3 }), now)
// → "3 hours ago"

// Calendar label — measured against a PlainDate
calendar(dt, Temporal.PlainDate.from('2026-04-09'))
// → "Today at 2:05 PM"

// Duration humanization
humanizeDuration(Temporal.Duration.from({ hours: 2, minutes: 45 }))
// → "3 hours"

// Bridge from a legacy Date
format(fromDate(new Date('2026-04-09T14:05:00Z')), 'YYYY-MM-DD[T]HH:mm:ssZ')
// → "2026-04-09T14:05:00+00:00"