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Apple Safari Google Chrome Microsoft Edge Mozilla Firefox Opera Spec
Layout API no signal partially
(Canary)
no signal no signal no signal
Spec
Paint API no signal yes
(Chrome 65)
no signal intent
(Servo)
yes
(Opera 52)

Spec
Parser API no signal no signal no signal no signal no signal
Properties & Values API no signal partially
(Canary)
no signal development no signal
Spec
AnimationWorklet no signal partially
(Canary)
no signal no signal no signal
Spec
Typed OM intent yes
(Chrome 66)
no signal intent no signal
Spec
Font Metrics API no signal no signal no signal no signal no signal

Layout API in Apple Safari

Layout API in Google Chrome

Notes
“Experimental Web Platform features” on chrome://flags.

Layout API in Microsoft Edge

Layout API in Mozilla Firefox

Notes
Development status in Mozilla’s Bugzilla.

Layout API in Opera

Paint API in Apple Safari

Paint API in Google Chrome

Version
Chrome 65. Release date: March 6, 2018
Notes
  • Feature on Chromestatus
  • Debugging (i.e. breakpoints) do not work.
  • No support for `paint()` arguments, due to the lack of support for Properties and Values API.

Paint API in Microsoft Edge

Paint API in Mozilla Firefox

Notes
Development status in Mozilla’s Bugzilla. Custom Paint is being experimented with in Servo.

Paint API in Opera

Version
Chrome 52. Release date: March 22, 2018
Notes
  • Debugging (i.e. breakpoints) do not work.
  • No support for `paint()` arguments, due to the lack of support for Properties and Values API.

Parser API in Apple Safari

Parser API in Google Chrome

Parser API in Microsoft Edge

Parser API in Mozilla Firefox

Parser API in Opera

Properties & Values API in Apple Safari

Properties & Values API in Google Chrome

Flags
“Experimental Web Platform features” on chrome://flags.
Notes
Still under development.

Properties & Values API in Microsoft Edge

Properties & Values API in Mozilla Firefox

Notes
Development status in Mozilla’s Bugzilla.

Properties & Values API in Opera

AnimationWorklet in Apple Safari

AnimationWorklet in Google Chrome

Notes
Feature on Chromestatus.

AnimationWorklet in Microsoft Edge

AnimationWorklet in Mozilla Firefox

AnimationWorklet in Opera

Typed OM in Apple Safari

Notes
Apple officially commited to Typed OM in a Houdini Task Force meeting in August 2017.

Typed OM in Google Chrome

Version
Chrome 65. Release date: April 17, 2018
Notes

Typed OM in Microsoft Edge

Typed OM in Mozilla Firefox

Notes
Development status in Mozilla’s Bugzilla.

Typed OM in Opera

Font Metrics API in Apple Safari

Font Metrics API in Google Chrome

Font Metrics API in Microsoft Edge

Font Metrics API in Mozilla Firefox

Font Metrics API in Opera