temporal-polyfill

temporal-polyfill

A spec-compliant* Temporal JavaScript polyfill in 15kb**.

Works in modern browsers***, not Internet Explorer.

Codepen

CDN link

Installation

npm install temporal-polyfill

A) Import globally:

import 'temporal-polyfill/global'

// the global Temporal object is now available
const zdt = Temporal.ZonedDateTime.from('2020-08-05T20:06:13[America/Chicago]')
console.log(zdt.toLocaleString())

B) Import as an ES module without side effects:

import { ZonedDateTime } from 'temporal-polyfill'

const zdt = ZonedDateTime.from('2020-08-05T20:06:13[America/Chicago]')
console.log(zdt.toLocaleString())

C) The above techniques try using the built-in Temporal object and fall back to the polyfill. To guarantee using the polyfill, do this:

import { ZonedDateTime } from 'temporal-polyfill/impl'

const zdt = ZonedDateTime.from('2020-08-05T20:06:13[America/Chicago]')
console.log(zdt.toLocaleString())

* = almost spec-compliant. a few more tests must pass (see results)

** = the size will shrink as the codebase is cleaned up

*** = targets browsers that support BigInt, however, more browser-compatibility work is needed