initialBaseline · Widely available
The initial keyword resets any CSS property to its initial value as defined by the specification. For example, the initial value of the display property is inline, regardless of the element being styled. Not to be confused with revert, which resets to the user or browser default style.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Nov 12, 2015. Widely available since May 12, 2018.
Browser support
DesktopChrome
1+Supportedsince Dec 11, 2008
Current: 155Edge
12–12Not supported
13+Supportedsince Nov 12, 2015
Current: 154Firefox
1–18Not supported
19+Supportedsince Feb 19, 2013
Current: 157Safari
1–1.1Not supported
1.2+Supportedsince Feb 2, 2004
Current: 27MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155Firefox Android
4–18Not supported
19+Supportedsince Feb 19, 2013
Current: 157Safari iOS
1+Supportedsince Jun 29, 2007
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: initial.
Feature detection
There’s no simple runtime check for this feature; rely on the support table and test in your target browsers.