Opera: ECMAScript support in Opera Presto 2.8

ECMAScript support in Opera Presto 2.8

ECMAScript is the standardized version of JavaScript Core. It is being standardized through the ECMA standards body. ECMAScript does not include browser and document related objects.

ECMA-262 2 and 3

Opera Presto supports the entire ECMA-262 2nd and 3rd standards, with no exceptions. They are more or less aligned with JavaScript 1.3/1.5 Core.

ECMA-262 5 (ECMAScript 5)

Opera Presto partially supports ECMAScript 5.
Native JSON support has been added.

Opera Software is actively participating with ECMA TC39 in developing successors to the current spec, and will support future editions of the language as consensus is reached and the specifications become finalized.

Opera Presto provides support for ECMAScript as described in the following table.

Objects/Properties/Methods	JS	ECMA	Support
Global	1.0	ES1	Yes
`eval(x)`	1.0	ES1	Yes
`isNaN(number)`	1.1	ES1	Yes
`isFinite(number)`	1.2	ES1	Yes
`decodeURI(encodedURI)`	1.5	ES3	Yes
`decodeURIComponent(encodedURIComponent)`	1.5	ES3	Yes
`encodeURI(uri)`	1.5	ES3	Yes
`encodeURIComponent(uriComponent)`	1.5	ES3	Yes
`parseInt(string [, radix])`	1.0	ES1	Yes
`parseFloat(string)`	1.0	ES1	Yes
`escape(string)`	1.0	ES1	Yes
`Infinity`	1.3	ES1	Yes
`NaN`	1.3	ES1	Yes
`undefined`	1.5	ES2	Yes
`unescape(string)`	1.0	ES1	Yes
Object	1.0	ES1	Yes
`hasOwnProperty(V)`	1.5	ES3	Yes
`isPrototypeOf(V)`	1.5	ES3	Yes
`propertyIsEnumerable(V)`	1.5	ES3	Yes
`toLocaleString()`	1.5	ES3	Yes
`toString()`	1.0	ES1	Yes
`unwatch(prop)`	-	-	No
`valueOf()`	1.1	ES1	Yes
`watch(prop, handler)`	-	-	No
`constructor`	1.1	ES1	Yes
`prototype`	(1.0)	ES1	Yes
Function	1.0	ES1	Yes
`apply(thisArg [, argArray])`	1.2	ES3	Yes
`call(thisArg [, arg1, arg2, ... , argN])`	1.5	ES3	Yes
`toString()`	1.0	ES3	Yes
`valueOf()`	(1.1)	ES1	Yes
`arity`	1.2	-	No
`caller`	1.5	-	Yes
`constructor`	(1.1)	ES1	Yes
`length`	1.1	ES1	Yes
`prototype`	1.1	ES1	Yes
Arguments	1.1	ES1	Yes
`callee`	1.2	ES3	Yes
`caller`	1.2	-	No
`length`	1.1	ES3	Yes
Array	1.1	ES1	Yes
`concat([item1, item2, ... , itemN])`	1.2	ES3	Yes
`every(callback[, thisObject])`	1.6	-	Yes
`filter(callback[, thisObject])`	1.6	-	Yes
`forEach(callback[, thisObject])`	1.6	-	Yes
`indexOf(item)`	1.6	-	Yes
`join(separator)`	1.1	ES1	Yes
`lastIndexOf(item)`	1.6	-	Yes
`map(callback[, thisObject])`	1.6	-	Yes
`pop()`	1.2	ES2	Yes
`push([item1, item2, ... , itemN])`	1.2	ES2	Yes
`reverse()`	1.1	ES1	Yes
`shift()`	1.2	ES2	Yes
`slice(start [, end])`	1.2	ES2	Yes
`some(callback[, thisObject])`	1.6	-	Yes
`sort(comparefn)`	1.1	ES1	Yes
`splice(start, deleteCount [, item1, item2, ... , itemN])`	1.2	ES2	Yes
`toString()`	1.1	ES1	Yes
`toLocaleString()`	1.5	ES2	Yes
`unshift([item1, item2, ... , itemN])`	1.2	ES2	Yes
`valueOf()`	1.1	ES3	Yes
`constructor`	1.1	ES1	Yes
`index`	1.2	ES3	Yes
`input`	1.2	ES3	Yes
`length`	1.1	ES1	Yes
`prototype`	1.1	ES1	Yes
String	1.0	ES1	Yes
`anchor(string)`	-	-	Yes
`big()`	-	-	Yes
`blink()`	-	-	Yes
`bold()`	-	-	Yes
`charAt(pos)`	1.0	ES1	Yes
`charCodeAt(pos)`	1.2	ES1	Yes
`concat ([item1, item2, ... , itemN])`	1.2	ES3	Yes
`fixed()`	-	-	Yes
`fontcolor(string)`	-	-	Yes
`fontsize(string)`	-	-	Yes
`fromCharCode([code0, code1, ... , codeN])`	1.2	ES1	Yes
`indexOf(pattern [, pos])`	1.0	ES1	Yes
`italics()`	-	-	Yes
`lastIndexOf(pattern [, pos])`	1.0	ES1	Yes
`link(string)`	-	-	Yes
`localeCompare(that)`	1.5	ES3	Yes
`replace(searchValue, replaceValue)`	1.2	ES3	Yes
`search(regexp)`	1.2	ES3	Yes
`slice(start [, end])`	1.2	ES3	Yes
`small()`	-	-	Yes
`split(separator [, lim])`	1.1	ES1	Yes
`strike()`	-	-	Yes
`sub()`	-	-	Yes
`substring(start, end)`	1.0	ES1	Yes
`substr(start [, length])`	1.2	ES1	Yes
`sup()`	-	-	Yes
`toLocaleLowerCase()`	1.5	ES3	Yes
`toLocaleUpperCase()`	1.5	ES3	Yes
`toLowerCase()`	1.0	ES1	Yes
`toString()`	1.0	ES1	Yes
`toUpperCase()`	1.0	ES1	Yes
`valueOf()`	1.0	ES1	Yes
`constructor`	1.0	ES1	Yes
`length`	1.0	ES1	Yes
`match (regexp)`	1.2	ES3	Yes
`prototype`	1.1	ES1	Yes
Boolean	1.1	ES1	Yes
`toString()`	1.1	ES1	Yes
`valueOf()`	1.1	ES1	Yes
`constructor`	1.1	ES1	Yes
`prototype`	1.1	ES1	Yes
Number	1.1	ES1	Yes
`toExponential(fractionDigits)`	1.5	ES3	Yes
`toFixed(fractionDigits)`	1.5	ES3	Yes
`toLocaleString()`	1.5	ES3	Yes
`toPrecision(precision)`	1.5	ES3	Yes
`toString([radix])`	1.1	ES1	Yes
`valueOf()`	1.1	ES1	Yes
`constructor`	1.1	ES1	Yes
`MAX_VALUE`	1.1	ES1	Yes
`MIN_VALUE`	1.1	ES1	Yes
`NaN`	1.1	ES1	Yes
`NEGATIVE_INFINITY`	1.1	ES1	Yes
`POSITIVE_INFINITY`	1.1	ES1	Yes
`prototype`	1.1	ES1	Yes
Math	1.0	ES1	Yes
`abs(x)`	1.0	ES1	Yes
`acos(x)`	1.0	ES1	Yes
`asin(x)`	1.0	ES1	Yes
`atan(x)`	1.0	ES1	Yes
`atan2(y, x)`	1.0	ES1	Yes
`ceil(x)`	1.0	ES1	Yes
`cos(x)`	1.0	ES1	Yes
`exp(x)`	1.0	ES1	Yes
`floor(x)`	1.0	ES1	Yes
`log(x)`	1.0	ES1	Yes
`max([value1, value2, ... , valueN])`	1.0	ES1	Yes
`min([value1, value2, ... , valueN])`	1.0	ES1	Yes
`pow(x, y)`	1.0	ES1	Yes
`random()`	1.1	ES1	Yes
`round(x)`	1.0	ES1	Yes
`sin(x)`	1.0	ES1	Yes
`sqrt(x)`	1.0	ES1	Yes
`tan(x)`	1.0	ES1	Yes
`E`	1.0	ES1	Yes
`LN10`	1.0	ES1	Yes
`LN2`	1.0	ES1	Yes
`LOG2E`	1.0	ES1	Yes
`LOG10E`	1.0	ES1	Yes
`PI`	1.0	ES1	Yes
`SQRT1_2`	1.0	ES1	Yes
`SQRT2`	1.0	ES1	Yes
Date	1.0	ES1	Yes
getTime()	1.0	ES1	Yes
`getFullYear()`	1.2	ES1	Yes
`getUTCFullYear()`	1.2	ES1	Yes
`getMonth()`	1.0	ES1	Yes
`getUTCMonth()`	1.2	ES1	Yes
`getDate()`	1.0	ES1	Yes
`getUTCDate()`	1.2	ES1	Yes
`getDay()`	1.0	ES1	Yes
`getUTCDay()`	1.2	ES1	Yes
`getHours()`	1.0	ES1	Yes
`getUTCHours()`	1.2	ES1	Yes
`getMinutes()`	1.0	ES1	Yes
`getUTCMinutes()`	1.2	ES1	Yes
`getSeconds()`	1.0	ES1	Yes
`getUTCSeconds()`	1.2	ES1	Yes
`getMilliseconds()`	1.2	ES1	Yes
`getUTCMilliseconds()`	1.2	ES1	Yes
`getTimezoneOffset()`	1.0	ES1	Yes
`parse(string)`	1.0	ES1	Yes
`setTime(time)`	1.0	ES1	Yes
`setMilliseconds(ms)`	1.2	ES1	Yes
`setUTCMilliseconds(ms)`	1.2	ES1	Yes
`setSeconds(sec [, ms])`	1.0	ES1	Yes
`setUTCSeconds(sec [, ms])`	1.2	ES1	Yes
`setMinutes(minute [, sec, ms])`	1.0	ES1	Yes
`setUTCMinutes(minute [, sec, ms])`	1.2	ES1	Yes
`setHours(hour [, minute, sec, ms])`	1.0	ES1	Yes
`setUTCHours(hour [, minute, sec, ms])`	1.2	ES1	Yes
`setDate(date)`	1.0	ES1	Yes
`setUTCDate(date)`	1.2	ES1	Yes
`setMonth(month [, date])`	1.0	ES1	Yes
`setUTCMonth(month [, date])`	1.2	ES1	Yes
`setFullYear(year [, month, date])`	1.2	ES1	Yes
`setUTCFullYear(year [, month, date])`	1.2	ES1	Yes
`toUTCString()`	1.2	ES1	Yes
`toGMTString()`	1.0	ES3	Yes
`getYear()`	1.0	ES1	Yes
`setYear(year)`	1.0	ES1	Yes
`toString()`	1.0	ES1	Yes
`toDateString()`	1.5	ES3	Yes
`toTimeString()`	1.5	ES3	Yes
`toLocaleString()`	1.0	ES1	Yes
`toLocaleDateString()`	1.5	ES3	Yes
`toLocaleTimeString()`	1.5	ES3	Yes
`UTC(year, month [, date, hours, minutes, seconds, ms])`	1.0	ES1	Yes
`valueOf()`	1.1	ES1	Yes
`constructor`	1.1	ES1	Yes
`prototype`	1.1	ES1	Yes
RegExp	1.2	ES3	Yes
`toString()`	1.2	ES3	Yes
`compile (pattern [, flags])`	1.2	-	Yes
`exec ([string])`	1.2	ES3	Yes
`constructor`	1.2	ES3	Yes
`ignoreCase`	1.2	ES3	Yes
`input (also $_)`	1.2	-	No
`global`	1.2	ES3	Yes
`lastIndex`	1.2	ES3	Yes
`lastMatch (also $&)`	1.2	-	No
`lastParen (also $+)`	1.2	-	No
leftContext (also $`)	1.2	-	No
`multiline`	1.2	ES3	Yes
`multiline (also $*)`	1.2	-	No
`notation (also $*)`	1.2	-	No
`parenthesized substring matches ($1...$9)`	1.2	-	Yes
`prototype`	1.2	ES3	Yes
`rightContext (also $')`	1.2	-	No
`source`	1.2	ES3	Yes
`test ([string])`	1.2	ES3	Yes
Error	1.5	ES3	Yes
`toString()`	1.5	ES3	Yes
`constructor`	1.5	ES3	Yes
`message`	1.5	ES3	Yes
`name`	1.5	ES3	Yes
`prototype`	1.5	ES3	Yes

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