coderef

OES_standard_derivatives WebGL extensionBaseline · Widely available

The OES_standard_derivatives extension for WebGL 1.0 contexts adds the GLSL derivative functions dFdx, dFdy, and fwidth.

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.

How to use ↓Compare browsers

Browser support

DesktopChrome
1–9Not supported
10+Supportedsince Mar 8, 2011
Current: 155
Edge
12+Supportedsince Jul 29, 2015
Current: 154
Firefox
1–9Not supported
10+Supportedsince Jan 31, 2012
Current: 157
Safari
1–7Not supported
8+Supportedsince Oct 16, 2014
Current: 27
MobileChrome Android
18+Supportedsince Jun 27, 2012
Current: 155
Firefox Android
4–9Not supported
10+Supportedsince Jan 31, 2012
Current: 157
Safari iOS
1–7Not supported
8+Supportedsince Sep 17, 2014
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: OES standard derivatives.

Feature detection

JS · check before using
if ("OES_standard_derivatives" in globalThis) {
  // OES_standard_derivatives is available
} else {
  // load a polyfill or use a fallback
}

Documentation (MDN)

Specification