getComputedStyle()Baseline · Widely available
The getComputedStyle() global method returns an CSSStyleDeclaration object that represents all CSS declarations applied to a given element.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Jul 29, 2015. Widely available since Jan 29, 2018.
Browser support
DesktopChrome
1–10Not supported
11+Supportedsince Apr 27, 2011
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–3Not supported
3.5+Supportedsince Jun 30, 2009
Current: 157Safari
1–5Not supported
5.1+Supportedsince Jul 20, 2011
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4+Supportedsince Mar 29, 2011
Current: 157Safari iOS
1–4.2Not supported
5+Supportedsince Oct 12, 2011
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: getComputedStyle.
Feature detection
JS · check before using
if ("Window" in globalThis && "getComputedStyle" in Window.prototype) {
// Window.getComputedStyle is available
}Documentation (MDN)
Usage share
Sub-features
Support for each part of the feature (2). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| Window.getComputedStyle | 1 | 12 | 1 | 3 | 18 | 4 | 1 |
| Window.getComputedStyle.pseudo_element_support | 11 | 12 | 3.5 | 5.1 | 18 | 4 | 5 |