HTMLTimeElement

<time> time

Baseline: Widely available on the web, in every major browser since Oct 2017, and long enough to count on (since Apr 2020).

niso: Partial 50%. 4 of 8 subtests pass, by system: Linux 50%, macOS 50%. Engines: QuickJS, the engine niso's WPT run uses; Node and Porffor have no recorded run. WPT results recorded at f3b4fa8, 2026-11-10; web-features 3.45.0. WPT tests · niso's support · HTMLTimeElement

HTMLTimeElement is an interface in idl/html-elements.webidl, inheriting HTMLElement, exposed in Window. What it does is on MDN; this page says what niso has of it.

Platform notes

All platforms

Inside a surface, a <time> with data-timer-start or data-timer-end (ms since the Unix epoch) is the platform’s self-updating timer, as long as it is a box of its own.

iOS

SwiftUI Text(date, style: .timer) in widgets and the Live Activity.

Android

A Chronometer in the Glance widget and the ongoing notification.

Status

The web features its members belong to, each with its Baseline status on the web and how much of the feature’s WPT suite passes in niso (see Web platform support).

Feature	On the web	In niso	Members
<time>	Widely available	Partial 50% 4 of 8 subtests pass	1

Members

constructor

constructor

[HTMLConstructor] constructor();

Not in niso yet

Members the web has, by the BCD keys web-features 3.45.0 lists, that idl/ doesn’t declare. The list is partial: web-features lists only the keys it maps to a feature.

• dateTime (<time>)