contain-intrinsic-sizeBaseline · Widely available

The contain-intrinsic-size CSS property sets the intrinsic size of an element. When using size containment, the browser will lay out the element as if it had a single child of this size.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 18, 2023. Widely available since Mar 18, 2026.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–81Not supported

83+Supportedsince May 19, 2020

Current: 155

Edge

12–81Not supported

83+Supportedsince May 21, 2020

Current: 154

Firefox

1–106Not supported

107+Supportedsince Nov 15, 2022

Current: 157

Safari

1–16.6Not supported

17+Supportedsince Sep 18, 2023

Current: 27

MobileChrome Android

18–81Not supported

83+Supportedsince May 19, 2020

Current: 155

Firefox Android

4–106Not supported

107+Supportedsince Nov 15, 2022

Current: 157

Safari iOS

1–16.6Not supported

17+Supportedsince Sep 18, 2023

Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: contain-intrinsic-block-size.

Feature detection

CSS · check before using

@supports (contain-intrinsic-size: initial) {
  /* styles that rely on contain-intrinsic-size */
}

/* or in JavaScript */
if (CSS.supports("contain-intrinsic-size", "initial")) {
  // use it
}

Documentation (MDN)

Specification

drafts.csswg.org#intrinsic-size-override ↗

Sub-features

Support for each part of the feature (11). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
contain-intrinsic-block-size	95	95	107	17	95	107	17
contain-intrinsic-block-size.none	98	98	107	17	98	107	17
contain-intrinsic-height	95	95	107	17	95	107	17
contain-intrinsic-height.none	98	98	107	17	98	107	17
contain-intrinsic-inline-size	95	95	107	17	95	107	17
contain-intrinsic-inline-size.none	98	98	107	17	98	107	17
contain-intrinsic-size	83	83	107	17	83	107	17
contain-intrinsic-size.auto_none	117	117	117	17	117	117	17
contain-intrinsic-size.none	98	98	107	17	98	107	17
contain-intrinsic-width	95	95	107	17	95	107	17
contain-intrinsic-width.none	98	98	107	17	98	107	17