Comparison of layout engines (ECMAScript)

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The following tables compare ECMAScript (particularly JavaScript) support for several popular layout engines. Please see the individual products' articles for further information. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.

Explanation of the tables

Engine nomenclature

Rather than the names of web browsers, the names of the underlying engines are used. The browsers that use the various engines are listed below.

Layout engine Release version Preview version Used by
Amaya 11.4.7[1] N/A No longer developed; Amaya
Blink 537.36 source code[note 1] Chromium/Chrome (28+), Opera (15+), Yandex, Liebao and Samsung Browser[citation needed].
EdgeHTML 13.10586 [2] N/A Microsoft Edge, Universal Windows Platform (UWP) JavaScript apps
Gecko 43.0.4 (January 6, 2016; 9 years ago (2016-01-06)[3]) [±]
ESR

38.5.2 (December 22, 2015; 9 years ago (2015-12-22)[4]) [±]
Beta

44.0 Beta 8 (January 12, 2016; 9 years ago (2016-01-12)[5][6]) [±]

Developer Edition

45.0a2 (December 18, 2015; 9 years ago (2015-12-18)[7]) [±] daily release

Nightly

46.0a1 (December 14, 2015; 9 years ago (2015-12-14)[8]) [±] daily release

 All Mozilla software, including Firefox; SeaMonkey and Galeon; Camino; K-Meleon; Flock (up to 2.x); Debian IceWeasel; GNU IceCat (formerly GNU IceWeasel); Cyberfox; Icedove, Iceape and Iceowl; Firefox for mobile ("Fennec"). Also used by the Maple platform in 2010 and 2011 Samsung "SmartTV" devices which are based on the build used in Firefox 3.0.[citation needed] Nokia Asha platform is also using Gecko for web apps rendering.
KHTML 4.12.3[9] N/A Konqueror[note 2]
Presto 2.12.388 N/A No longer developed; Opera and Opera Mobile use Blink now; Nintendo DS & DSi Browser; Internet Channel
Tasman (IE 5.2.3 for Mac) N/A No longer developed (aborted in 2003); Internet Explorer 5+ for Mac OS X
Trident 7.0 (IE 11) N/A Internet Explorer and other Internet Explorer shells like Maxthon (Microsoft Windows operating systems only), Windows Phone 8
WebKit 534.20 nightly build[note 3] Tizen (both OS and browser), Safari (both desktop and mobile), Google Chrome (before 28), Maxthon 3, Shiira, iCab 4, OmniWeb 5.5+, Web, Adobe AIR, Midori, Adobe Dreamweaver CS4 and CS5, Android browser, Palm webOS browser, Symbian S60 browser, OWB, Steam, Rekonq, Arora, Flock (version 3+), RockMelt, Dolphin Browser, Sleipnir, Konqueror[note 2]. Used by the LG Smart TV platform to enable web content on TVs.

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Values

Values indicate the level of support in the most recent version of the layout engine, or (if a version number is given) in the specified version. Version numbers without any other value indicate the version at which the layout engine first fully supported the feature.

Value Meaning
Yes Indicates that the layout engine fully supports this property/element when valid values are used.
No Indicates that the property/element is completely ignored.
Partial Indicates that the property/element is understood, but that not all values are supported. Supported values are implemented correctly.
Incorrect Indicates that the property/element is understood, but that it is not implemented correctly in all cases.
Experimental Indicates that the property/element is understood, but supported under an alternate name. May be incomplete or buggy.
Dropped Indicates that the property/element is no longer supported.
Nightly build Indicates that the property/element is supported to some extent in an experimental/nightly build. Future support is expected.
Depends Indicates that the property/element is supported only on certain platforms, or if certain settings are configured.

ECMAScript version support

Trident Gecko WebKit Presto Blink
Name of ECMAScript Engine JScript/Chakra Spidermonkey/TraceMonkey/JägerMonkey/IonMonkey JavaScriptCore/SquirrelFish Extreme Linear B/Futhark/Carakan V8
ECMAScript Edition 3 Yes 0.6 Yes 1.0 Yes
ECMAScript Edition 5 5.0 2.0 Partial Yes Yes
JavaScript 1.5 extensions No 0.6 Yes 1.0 Yes
JavaScript 1.6 extensions
(excluding E4X)		 No 1.8 Partial Partial Partial
JavaScript 1.7 extensions No 1.8.1 No Partial No
JavaScript 1.8 extensions No 1.9 Partial No Partial
JavaScript 1.8.1 extensions No 1.9.1 No No No
JScript .NET extensions No No No No No
ActionScript extensions No No No No No
E4X No Dropped[10] No No No

Standard Library

Global object

Trident Gecko WebKit Presto Blink
Value properties
NaN 4.0 0.6 Yes Yes Yes
Infinity 4.0 0.6 Yes Yes Yes
undefined 5.5 0.6 Yes Yes Yes
Function properties
eval(x) 3.0 0.6 Yes Yes Yes
parseInt(string [, radix]) 3.0 0.6 Yes Yes Yes
parseFloat(string) 3.0 0.6 Yes Yes Yes
isNaN(number) 4.0 0.6 Yes Yes Yes
isFinite(number) 4.0 0.6 Yes Yes Yes
URI handling functions
decodeURI(encodedURI) 5.5 0.6 Yes Yes Yes
decodeURIComponent(encodedURIComponent) 5.5 0.6 Yes Yes Yes
encodeURI(uri) 5.5 0.6 Yes Yes Yes
encodeURIComponent(uriComponent) 5.5 0.6 Yes Yes Yes
Constructor properties
Object 4.0 Yes Yes Yes Yes
Function 4.0 Yes Yes Yes Yes
Array 4.0 Yes Yes Yes Yes
String 3.0 Yes Yes Yes Yes
Boolean 3.0 Yes Yes Yes Yes
Number 3.0 Yes Yes Yes Yes
Date 3.0 Yes Yes Yes Yes
RegExp 4.0 Yes Yes Yes Yes
Error 5.0 Yes Yes Yes Yes
EvalError 5.0 Yes Yes Yes Yes
RangeError 5.0 Yes Yes Yes Yes
ReferenceError 5.0 Yes Yes Yes Yes
SyntaxError 5.0 Yes Yes Yes Yes
TypeError 5.0 Yes Yes Yes Yes
URIError 5.0 Yes Yes Yes Yes
Other properties
Math 3.0 Yes Yes Yes Yes
Additional properties
escape(string) 3.0 Yes Yes Yes Yes
unescape(string) 3.0 Yes Yes Yes Yes

Object object

Trident Gecko WebKit Presto Blink
Called as function
Object([value]) Yes Yes Yes Yes Yes
Called as constructor
new Object([value]) 4.0 Yes Yes Yes Yes
Properties
prototype 4.0 Yes Yes Yes Yes
Properties of prototype
constructor 4.0 Yes Yes Yes Yes
toString() 4.0 Yes Yes Yes Yes
toLocaleString() 4.0 Yes Yes Yes Yes
valueOf() 4.0 Yes Yes Yes Yes
hasOwnProperty(V) 5.5 Yes 3 Yes Yes
isPrototypeOf(V) 5.5 Yes 3 Yes Yes
propertyIsEnumerable(V) 5.5 Yes 3 Yes Yes

Function object

Trident Gecko WebKit Presto Blink
Called as function
Function([[p1 [, p2 [, ...]],] body])  ? Yes Yes  ? Yes
Called as constructor
new Function([[p1 [, p2 [, ...]],] body]) 4.0 1.0 Yes 1.0 Yes
Properties
length  ? 1.0 Yes Yes Yes
prototype 4.0 1.0 Yes 1.0 Yes
Properties of prototype
length  ? 1.0 Yes  ? Yes
constructor 4.0 1.0 Yes 1.0 Yes
toString() 4.0 1.0 Yes 1.0 Yes
apply(thisArg, argArray) 4.0 1.0 Yes 1.0 Yes
call(thisArg [, arg1 [, arg2 [, ...]]]) 4.0 1.0 Yes 1.0 Yes
Properties of instances
length 4.0 1.0 Yes 1.0 Yes
prototype 4.0 1.0 Yes 1.0 Yes

Array object

Trident Gecko WebKit Presto Blink
Called as function
Array([item1 [, item2 [, ...]]]) Yes Yes Yes Yes Yes
Called as constructor
new Array([item1, item2 [, ...]]) 4.0 1.0 Yes 1.0 Yes
new Array(len) 4.0 1.0 Yes 1.0 Yes
Properties
prototype 4.0 1.0 Yes 1.0 Yes
Properties of prototype
constructor 4.0 1.0 Yes 1.0 Yes
toString() 4.0 1.0 Yes 1.0 Yes
toLocaleString() 5.5 1.0 Yes 1.0 Yes
concat([item1 [, item2 [,...]]]) 4.0 1.0 Yes 1.0 Yes
join(separator) 4.0 1.0 Yes 1.0 Yes
pop() 5.5 1.0 Yes 1.0 Yes
push([item1 [, item2 [,...]]]) 5.5 1.0 Yes 1.0 Yes
reverse() 4.0 1.0 Yes 1.0 Yes
shift() 5.5 1.0 Yes 1.0 Yes
slice(start, end) 4.0 1.0 Yes 1.0 Yes
sort(comparefn) 4.0 1.0 Yes 1.0 Yes
splice(start, deleteCount [, item1 [, item2 [, ...]]]) 5.5 1.0 Yes 1.0 Yes
unshift([item1 [, item2 [, ...]]]) 5.5 1.0 Yes 1.0 Yes
indexOf(searchElement[, fromIndex]) 9.0[11] 1.8 522 2.1 Yes
lastIndexOf(searchElement[, fromIndex]) 1.8 522 2.1 Yes
filter(callback[, thisObject]) 1.8 522 2.1 Yes
forEach(callback[, thisObject]) 1.8 522 2.1 Yes
every(callback[, thisObject]) 1.8 522 2.1 Yes
map(callback[, thisObject]) 1.8 522 2.1 Yes
some(callback[, thisObject]) 1.8 522 2.1 Yes
reduce(callback[, initialValue]) 1.9 528 2.5.22 Yes
reduceRight(callback[, initialValue]) 1.9 528 2.5.22 Yes
Properties of instances
length 4.0 1.0 Yes 1.0 Yes

String object

Trident Gecko WebKit Presto Blink
Called as function
String([value]) Yes Yes Yes Yes Yes
Called as constructor
new String([value]) 3.0 1.0 Yes 1.0 Yes
Properties
prototype 4.0 1.0 Yes 1.0 Yes
fromCharCode([char0 [, char1 [, ...]]]) 4.0 1.0 Yes 1.0 Yes
Properties of prototype
constructor 4.0 1.0 Yes 1.0 Yes
toString() 3.0 1.0 Yes 1.0 Yes
valueOf() 3.0 1.0 Yes 1.0 Yes
charAt(pos) 3.0 1.0 Yes 1.0 Yes
charCodeAt(pos) 5.5 1.0 Yes 1.0 Yes
concat([string1 [, string2 [, ...]]]) 4.0 1.0 Yes 1.0 Yes
indexOf(searchString, position) 3.0 1.0 Yes 1.0 Yes
lastIndexOf(searchString, position) 3.0 1.0 Yes 1.0 Yes
localeCompare(that) 5.5 1.0 Yes 1.0 Yes
match(regexp) 4.0 1.0 Yes 1.0 Yes
replace(searchValue, replaceValue) 3.0 1.0 Yes 1.0 Yes
search(regexp) 4.0 1.0 Yes 1.0 Yes
slice(start, end) 4.0 1.0 Yes 1.0 Yes
split(separator, limit) 4.0 1.0 Yes 1.0 Yes
substring(start, end) 3.0 1.0 Yes 1.0 Yes
toLowerCase() 3.0 1.0 Yes 1.0 Yes
toLocaleLowerCase(comparefn) 3.0 1.0 Yes 1.0 Yes
toUpperCase() 3.0 1.0 Yes 1.0 Yes
toLocaleUpperCase() 3.0 1.0 Yes 1.0 Yes
Additional properties of prototype
substr(start, length) 4.0 1.0 Yes 1.0 Yes
Properties of instances
length 3.0 1.0 Yes 1.0 Yes

Boolean object

Trident Gecko WebKit Presto Blink
Called as function
Boolean([value]) Yes Yes Yes Yes Yes
Called as constructor
new Boolean([value]) 3.0 Yes Yes Yes Yes
Properties
prototype 4.0 Yes Yes Yes Yes
Properties of prototype
constructor 4.0 Yes Yes Yes Yes
toString() 4.0 Yes Yes Yes Yes
valueOf() 4.0 Yes Yes Yes Yes

Number object

Trident Gecko WebKit Presto
Called as function
Number([value])  ? Yes Yes  ?
Called as constructor
new Number([value]) 3.0 1.0 Yes 1.0
Properties
prototype 4.0 1.0 Yes 1.0
MAX_VALUE 4.0 1.0 Yes 1.0
MIN_VALUE 4.0 1.0 Yes 1.0
NaN 4.0 1.0 Yes 1.0
NEGATIVE_INFINITY 4.0 1.0 Yes 1.0
POSITIVE_INFINITY 4.0 1.0 Yes 1.0
Properties of prototype
constructor 4.0 1.0 Yes 1.0
toString([radix]) 4.0 1.0 Yes 1.0
toLocaleString() 5.5 1.0 Yes 1.0
valueOf() 4.0 1.0 Yes 1.0
toFixed(fractionDigits) 5.5 1.0 Yes 1.0
toExponential(fractionDigits) 5.5 1.0 Yes 1.0
toPrecision(precision) 5.5 1.0 Yes 1.0

Math object

Trident Gecko WebKit Presto
Value properties
E 3.0 1.0 Yes 1.0
LN10 3.0 1.0 Yes 1.0
LN2 3.0 1.0 Yes 1.0
LOG2E 3.0 1.0 Yes 1.0
LOG10E 3.0 1.0 Yes 1.0
PI Yes Yes Yes Yes
SQRT1_2 3.0 1.0 Yes 1.0
SQRT2 Yes Yes Yes Yes
Function properties
abs(x) 3.0 1.0 Yes 1.0
acos(x) 3.0 1.0 Yes 1.0
asin(x) 3.0 1.0 Yes 1.0
atan(x) 3.0 1.0 Yes 1.0
atan2(y, x) 3.0 1.0 Yes 1.0
ceil(x) 3.0 1.0 Yes 1.0
cos(x) 3.0 1.0 Yes 1.0
exp(x) 3.0 1.0 Yes 1.0
floor(x) 3.0 1.0 Yes 1.0
log(x) 3.0 1.0 Yes 1.0
max([value1 [, value2 [, ...]]]) 3.0 1.0 Yes 1.0
min([value1 [, value2 [, ...]]]) 3.0 1.0 Yes 1.0
pow(x, y) 3.0 1.0 Yes 1.0
random() 3.0 1.0 Yes 1.0
round(x) 3.0 1.0 Yes 1.0
sin(x) 3.0 1.0 Yes 1.0
sqrt(x) 3.0 1.0 Yes 1.0
tan(x) 3.0 1.0 Yes 1.0

Date object

Trident Gecko WebKit Presto
Called as function
Date ([year [, month [, date [, hours [, minutes [, seconds [, ms ]]]]]]])  ?  ?  ?  ?
Called as constructor
new Date (year, month [, date [, hours [, minutes [, seconds [, ms ]]]]]) 4.0 1.0 Yes 1.0
new Date (value) 4.0 1.0 Yes 1.0
new Date () 4.0 1.0 Yes 1.0
Properties
prototype 4.0 1.0 Yes 1.0
parse(string) 3.0 1.0 Yes 1.0
UTC (year, month [, date [, hours [, minutes [, seconds [, ms ]]]]]) 3.0 1.0 Yes 1.0
Properties of prototype
constructor 4.0 1.0 Yes 1.0
toString() 4.0 1.0 Yes 1.0
toDateString() 4.0 1.0 Yes 1.0
toTimeString() 4.0 1.0 Yes 1.0
toLocaleString() 4.0 1.0 Yes 1.0
toLocaleDateString() 4.0 1.0 Yes 1.0
toLocaleTimeString() 4.0 1.0 Yes 1.0
valueOf() 4.0 1.0 Yes 1.0
getTime() 3.0 1.0 Yes 1.0
getFullYear() 4.0 1.0 Yes 1.0
getMonth() 3.0 1.0 Yes 1.0
getUTCMonth() 4.0 1.0 Yes 1.0
getDate() 3.0 1.0 Yes 1.0
getUTCDate() 4.0 1.0 Yes 1.0
getDay() 3.0 1.0 Yes 1.0
getUTCDay() 4.0 1.0 Yes 1.0
getHours() 3.0 1.0 Yes 1.0
getUTCHours() 4.0 1.0 Yes 1.0
getMinutes() 3.0 1.0 Yes 1.0
getUTCMinutes() 4.0 1.0 Yes 1.0
getSeconds() 3.0 1.0 Yes 1.0
getUTCSeconds() 4.0 1.0 Yes 1.0
getMilliseconds() 4.0 1.0 Yes 1.0
getUTCMilliseconds() 4.0 1.0 Yes 1.0
getTimezoneOffset() 4.0 1.0 Yes 1.0
setTime(time) 3.0 1.0 Yes 1.0
setMilliseconds(ms) 4.0 1.0 Yes 1.0
setUTCMilliseconds(ms) 4.0 1.0 Yes 1.0
setSeconds(sec [, ms]) 3.0 1.0 Yes 1.0
setUTCSeconds(sec [, ms]) 4.0 1.0 Yes 1.0
setMinutes(min [, sec [, ms]]) 3.0 1.0 Yes 1.0
setUTCMinutes(min [, sec [, ms]]) 4.0 1.0 Yes 1.0
setHours(hour [, min [, sec [, ms]]]) 4.0 1.0 Yes 1.0
setUTCHours(hour [, min [, sec [, ms]]]) 4.0 1.0 Yes 1.0
setDate(date) 4.0 1.0 Yes 1.0
setUTCDate(date) 4.0 1.0 Yes 1.0
setMonth(month [, date]) 3.0 1.0 Yes 1.0
setUTCMonth(month [, date]) 4.0 1.0 Yes 1.0
setFullYear(year [, month [, date]]) 4.0 1.0 Yes 1.0
setUTCFullYear(year [, month [, date]]) 4.0 1.0 Yes 1.0
toUTCString() 4.0 1.0 Yes 1.0
Additional properties of prototype
getYear() 3.0 1.0 Yes 1.0
setYear(year) 3.0 1.0 Yes 1.0
toGMTString() 4.0 1.0 Yes 1.0

RegExp object

Trident Gecko WebKit Presto
Called as function
RegExp (pattern, flags)  ?  ?  ?  ?
Called as constructor
new RegExp (pattern, flags) 4.0 1.0 Yes 1.0
Properties
prototype 4.0 1.0 Yes 1.0
Properties of prototype
constructor 4.0 1.0 Yes 1.0
exec(string) 4.0 1.0 Yes 1.0
test(string) 4.0 1.0 Yes 1.0
toString() 4.0 1.0 Yes 1.0
Properties of instances
source 4.0 1.0 Yes 1.0
global 4.0 1.0 Yes 1.0
ignoreCase 5.5 1.0 Yes 1.0
multiline 5.5 1.0 Yes 1.0
lastIndex 4.0 1.0 Yes 1.0

Error object

Trident Gecko WebKit Presto
Called as function
Error (message)  ?  ?  ?  ?
Called as constructor
new Error (message) 5.0 1.0 Yes 1.0
Properties
prototype 5.0 1.0 Yes 1.0
Properties of prototype
constructor 5.0 1.0 Yes 1.0
name 5.5 1.0 Yes 1.0
message 5.5 1.0 Yes 1.0
toString() 5.0 1.0 Yes 1.0

NativeError objects

Trident Gecko WebKit Presto
Called as function
EvalError (message)  ? 1.0 Yes  ?
RangeError (message)  ? 1.0 Yes  ?
ReferenceError (message)  ? 1.0 Yes  ?
SyntaxError (message)  ? 1.0 Yes  ?
TypeError (message)  ? 1.0 Yes  ?
URIError (message)  ? 1.0 Yes  ?
Called as constructor
new EvalError (message)  ? 1.0 Yes  ?
new RangeError (message)  ? 1.0 Yes  ?
new ReferenceError (message)  ? 1.0 Yes  ?
new SyntaxError (message)  ? 1.0 Yes  ?
new TypeError (message)  ? 1.0 Yes  ?
new URIError (message)  ? 1.0 Yes  ?
Properties
prototype  ? 1.0  ?  ?
Properties of prototype
constructor  ? 1.0  ?  ?
name  ? 1.0 Yes  ?
message  ? 1.0 Yes  ?

References

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Notes

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External links

  • Webdevout — mostly covers Windows browsers. Extensive bug testing.
  1. ↑ Amaya Binary Releases, Most recent download link in stable
  2. ↑ Change log between EdgeHTML 12.10240 and 13.10586
  3. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Download for kdelibs, Most recent download link in stable
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.


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