DOMRect

DOM Geometry dom-geometry

Baseline: Widely available on the web, in every major browser since Jan 2020, and long enough to count on (since Jul 2022).

niso: Partial 96%. 1515 of 1575 subtests pass, by system: Linux 96%, macOS 96%. 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 · DOMRect

DOMRect is an interface in idl/html.webidl, exposed in Window, Worker. What it does is on MDN; this page says what niso has of it.

NisoValue: DOMRect has no identity, so it crosses the C API as a struct. The glue’s DOMRect (the Geometry Interfaces) makes the objects for script.

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
DOM Geometry	Widely available	Partial 96% 1515 of 1575 subtests pass	5

Members

x

attribute

readonly attribute unrestricted double x;

y

attribute

readonly attribute unrestricted double y;

width

attribute

readonly attribute unrestricted double width;

height

attribute

readonly attribute unrestricted double height;

top

attribute

readonly attribute unrestricted double top;

right

attribute

readonly attribute unrestricted double right;

bottom

attribute

readonly attribute unrestricted double bottom;

left

attribute

readonly attribute unrestricted double left;

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.

• DOMRect (DOM Geometry)
• fromRect_static (DOM Geometry)
• worker_support (DOM Geometry)