Táboa de compatibilidade ECMAScript 5

	IE 7	IE 8	IE 9	FF 3	FF 3.5, 3.6	FF 4	SF 3.2	SF 4	SF 5	WebKit	CH 5	CH 6	CH 7, 8, 9	OP 10.1	OP 10.5, 10.6, 10.7, 11	Konq 4.3	BESEN	Rhino 1.7
Object.create	No	No	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
Object.defineProperty	No	Yes ^[1]	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
Object.defineProperties	No	No	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
Object.getPrototypeOf	No	No	Yes	No	Yes	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
Object.keys	No	No	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
Object.seal	No	No	Yes	No	No	Yes	No	No	No	No	No	Yes	Yes	No	No	No	Yes	Yes
Object.freeze	No	No	Yes	No	No	Yes	No	No	No	No	No	Yes	Yes	No	No	No	Yes	Yes
Object.preventExtensions	No	No	Yes	No	No	Yes	No	No	No	No	No	Yes	Yes	No	No	No	Yes	Yes
Object.isSealed	No	No	Yes	No	No	Yes	No	No	No	No	No	Yes	Yes	No	No	No	Yes	Yes
Object.isFrozen	No	No	Yes	No	No	Yes	No	No	No	No	No	Yes	Yes	No	No	No	Yes	Yes
Object.isExtensible	No	No	Yes	No	No	Yes	No	No	No	No	No	Yes	Yes	No	No	No	Yes	Yes
Object.getOwnPropertyDescriptor	No	Yes	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes
Object.getOwnPropertyNames	No	No	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes

Date.prototype.toISOString	No	No	Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Yes
Date.now	No	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
Array.isArray	No	No	Yes	No	No	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Yes
JSON	No	Yes	Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Yes
Function.prototype.bind	No	No	Yes	No	No	Yes	No	No	No	No	No	No	Yes	No	No	No	Yes	Yes
String.prototype.trim	No	No	Yes	No	Yes	Yes	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	No	Yes	Yes

Array.prototype.indexOf	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.lastIndexOf	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.every	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.some	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.forEach	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.map	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.filter	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Array.prototype.reduce	No	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
Array.prototype.reduceRight	No	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes

Property access on strings ^[2]	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Reserved words as property names ^[3]	No	No	Yes	Yes	Yes	Yes	No	No	No	Yes	No	No	Yes	No	No	No	Yes	No

Strict mode ^[4]	No	No	No	No	No	Yes	No	No	No	Yes	No	No	No	No	No	No	Yes	No

^[1] En Internet Explorer 8 Object.defineProperty só acepta obxectos DOM (MSDN reference).

^[2] Por exemplo: "foobar"[3] === "b"

^[3] Por exemplo: ({ if: 1 })

^[4] Strict mode é soportado cando a seguinte expresión avalía a true — (function(){ "use strict"; return !this; })();

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Táboa de compatibilidade ECMAScript 5