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GitHub Feature Support Table

GitHub Feature Support Table

GitHub Feature Support Table

The table below details some of the client-side ECMAScript features we use to provide the largest and most advanced development platform in the world.

Key

Required feature available in this browser.

!Required feature, not available in this browser.

*Not avaible in this browser, but polyfilled using this library.

†Required feature, but polyfilled to smooth over bugs in this browser.

**Not available in this browser, but transpiled to a compatible syntax.

... Google Chrome Microsoft Edge Mozilla Firefox Apple Safari Opera Samsung Internet

Base Objects & Functions
queueMicrotask Function
!
71+
79+
69+
12.1+
58+
10.0+
HTMLDialogElement Constructor
!
37+
79+
98+
15.4+
24+
4.0+
globalThis Object
!
71+
79+
65+
12.1+
58+
10.0+
Object.fromEntries
!
73+
79+
63+
12.1+
60+
11.0+
Array.flatMap
!
69+
79+
62+
12+
56+
10.0+
String.trimEnd
!
66+
79+
61+
12+
53+
9.0+
String.matchAll
!
73+
79+
67+
13+
60+
11.0+
String.replaceAll
!
85+
85+
77+
13.1+
71+
14.0+
Promise.allSettled
!
76+
79+
71+
13+
63+
12.0+
Promise.any
!
85+
85+
79+
14+
71+
14+
String.prototype.at
!
92+
92+
90+
15.4+
65+
16.0+
Array.prototype.at
!
92+
92+
90+
15.4+
65+
16.0+
Object.hasOwn
!
93+
93+
92+
15.4+
79+
17.0+
AbortSignal.abort
!
93+
93+
88+
15+
79+
17.0+
AbortSignal.timeout
!
103+
103+
100+
16+
89+
16+
AggregateError
!
85+
85+
79+
14+
71+
14.0+
BroadcastChannel
!
54+
79+
38+
15.4+
41+
6.0+
Crypto.randomUUID
!
92+
92+
95+
15.4+
78+
16.0+
Element.replaceChildren
!
86+
86+
78+
14+
72+
14.0+
HTMLFormElement.requestSubmit
!
76+
79+
75+
16+
63+
12.0+

Polyfilled Features
ClipboardItem
*
66+ †
79+ †
87+ †
13.1+
53+ †
9.0+ †
Element.checkVisibility
*
105+
105+
106+
17.4+
91+
20.0+
navigator.clipboard
*
86+
79+
63+ †
13.1+
63+ †
12.0+ †
requestIdleCallback
*
47+
79+
55+
*
34+
5.0+
HTMLElement.popover
*
114+
114+
125+
17+
100+
23.0+
HTMLElement.popover = 'hint'
*
114+
114+
125+
17+
+
12.0+
beforetoggle on Dialog
*
132+
132+
133+
*
117+
*
command & commandfor
*
135+
*
*
*
*
*

Native Syntax
Exponentiation Operator
!
52+
14+
52+
10.1+
39+
6.0+
Object Rest/Spead
!
60+
79+
55+
11.1+
47+
8.2+
RegExp Named Capture Groups
!
64+
79+
78+
11.1+
51+
9.0+
Async Generators & for await
!
63+
79+
57+
11+
50+
8.0+
Optional Catch Binding
!
66+
79+
58+
11.1+
53+
9.0+
Optional Chaining Operator (?.)
!
80+
80+
74+
13.1+
67+
13.0+
Nullish Coalescing Operator (??)
!
80+
80+
72+
13.1+
67+
13.0+
Logical Nullish Assignment (??=)
**
85+
85+
79+
14+
71+
14.0+
Public Class Fields
**
72+
79+
69+
14.1+
60+
11.0+
Private Class Fields
**
74+
79+
90+
14.1+
62+
11.0+
Static Class Blocks
**
94+
94+
93+
16.4+
80+
17.0+

Transpiled Native Syntax
Decorators
**
**
**
**
**
**
**
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