List of JavaScript Objects and Functions

This reference contains a list of objects, functions and properties supported by the JavaScript engine in Qt. For a detailed description, see the ECMA-262 specification.

The Global Object

Value Properties

• NaN
• Infinity
• undefined

Function Properties

• eval(x)
• parseInt(string, radix)
• parseFloat(string)
• isNaN(number)
• isFinite(number)
• decodeURI(encodedURI)
• decodeURIComponent(encodedURIComponent)
• encodeURI(uri)
• encodeURIComponent(uriComponent)
• escape(string)
• unescape(string)

Constructor Properties

• Object
• Function
• Array
• ArrayBuffer
• String
• Boolean
• Number
• DataView
• Date
• Promise
• RegExp
• Map
• WeakMap
• Set
• WeakSet
• SharedArrayBuffer
• Symbol
• Error
• EvalError
• RangeError
• ReferenceError
• SyntaxError
• TypeError
• URIError

Other Properties

• Atomics
• Math
• JSON
• Reflect
• Proxy

The Object Object

Object Constructor

Function Properties

• getPrototypeOf(O)
• setPrototypeOf(O, P)
• getOwnPropertyDescriptor(O, P)
• getOwnPropertyDescriptors(O)
• getOwnPropertyNames(O)
• getOwnPropertySymbols(O)
• assign(O [, Properties])
• create(O [, Properties])
• defineProperty(O, P, Attributes)
• defineProperties(O, Properties)
• entries(O)
• is(V1, V2)
• keys(O)
• values(O)
• seal(O)
• isSealed(O)
• freeze(O)
• isFrozen(O)
• preventExtensions(O)
• isExtensible(O)

Object Prototype

Function Properties

• toString()
• toLocaleString()
• valueOf()
• hasOwnProperty(V)
• isPrototypeOf(V)
• propertyIsEnumerable(V)
• __defineGetter__(P, F)
• __defineSetter__(P, F)

Function Objects

Function Prototype

Function Properties

• toString()
• apply(thisArg, argArray)
• call(thisArg [, arg1 [, arg2, ...]])
• bind((thisArg [, arg1 [, arg2, …]])
• [Symbol.hasInstance](O)

Array Objects

Array Prototype Object

Function Properties

• toString()
• toLocaleString()
• concat([item1 [, item2 [, ...]]])
• copyWithin([item1 [, item2 [, ...]]])
• entries()
• fill(item [, index1 [, index2]])
• join(separator)
• find(callbackfn [, thisArg]) // ECMAScript 6: Added in Qt 5.9
• findIndex(callbackfn [, thisArg]) // ECMAScript 6: Added in Qt 5.9
• includes(item)
• keys()
• pop()
• push([item1 [, item2 [, ...]]])
• reverse()
• shift()
• slice(start, end)
• sort(comparefn)
• splice(start, deleteCount[, item1 [, item2 [, ...]]])
• unshift([item1 [, item2 [, ...]]])
• indexOf(searchElement [, fromIndex])
• lastIndexOf(searchElement [, fromIndex])
• every(callbackfn [, thisArg])
• some(callbackfn [, thisArg])
• forEach(callbackfn [, thisArg])
• map(callbackfn [, thisArg])
• filter(callbackfn [, thisArg])
• reduce(callbackfn [, initialValue])
• reduceRight(callbackfn [, initialValue])
• values()
• [Symbol.iterator]()

String Objects

String Prototype Object

Function Properties

• toString()
• valueOf()
• charAt(pos)
• charCodeAt(pos)
• codePointAt(pos)
• concat([string1 [, string2 [, ...]]])
• endsWith(searchString [, endPosition ]) // ECMAScript 6: Added in Qt 5.8
• includes(searchString [, position ]) // ECMAScript 6: Added in 5.8
• indexOf(searchString ,position)
• lastIndexOf(searchString, position)
• localeCompare(that)
• match(regexp)
• normalize()
• padEnd(length [, string])
• padStart(length [, string])
• repeat(count) // ECMAScript 6: Added in Qt 5.9
• replace(searchValue, replaceValue)
• search(regexp)
• slice(start, end)
• split(separator, limit)
• startsWith(searchString [, position ]) // ECMAScript 6: Added in Qt 5.8
• substr(start, length)
• substring(start, end)
• toLowerCase()
• toLocaleLowerCase()
• toUpperCase()
• toLocaleUpperCase()
• trim()
• [Symbol.iterator]()

Additionally, the QML engine adds the following functions to the String prototype:

• arg()

Boolean Objects

Boolean Prototype Object

Function Properties

• toString()
• valueOf()

Number Objects

Number Prototype Object

Function Properties

• toString(radix)
• toLocaleString()
• valueOf()
• toFixed(fractionDigits)
• toExponential(fractionDigits)
• toPrecision(precision)

Additionally, the QML engine adds the following functions to the Number prototype:

• fromLocaleString(locale, number)
• toLocaleCurrencyString(locale, symbol)
• toLocaleString(locale, format, precision)

The Number Object

Value Properties

• NaN
• NEGATIVE_INFINITY
• POSITIVE_INFINITY
• MAX_VALUE
• MIN_VALUE
• EPSILON // ECMAScript 6: Added in Qt 5.8
• MAX_SAFE_INTEGER
• MIN_SAFE_INTEGER

Function Properties

• isFinite(x) // ECMAScript 6: Added in Qt 5.8
• isInteger(x)
• isSafeInteger(x)
• isNaN(x) // ECMAScript 6: Added in Qt 5.8

The Math Object

Value Properties

• E
• LN10
• LN2
• LOG2E
• LOG10E
• PI
• SQRT1_2
• SQRT2

Function Properties

• abs(x)
• acos(x)
• acosh(x)
• asin(x)
• asinh(x)
• atan(x)
• atanh(x)
• atan2(y, x)
• cbrt(x)
• ceil(x)
• clz32(x)
• cos(x)
• cosh(x)
• exp(x)
• expm1(x)
• floor(x)
• fround(x)
• hypot(x, y)
• imul(x, y)
• log(x)
• log10(x)
• log1p(x)
• log2(x)
• max([value1 [, value2 [, ...]]])
• min([value1 [, value2 [, ...]]])
• pow(x, y)
• random()
• round(x)
• sign(x) // ECMAScript 6: Added in Qt 5.8
• sin(x)
• sinh(x)
• sqrt(x)
• tan(x)
• tanh(x)
• trunc(x)

Date Objects

Date Prototype Object

Function Properties

• toString()
• toDateString()
• toTimeString()
• toLocaleString()
• toLocaleDateString()
• toLocaleTimeString()
• valueOf()
• getTime()
• getFullYear()
• getUTCFullYear()
• getMonth()
• getUTCMonth()
• getDate()
• getUTCDate()
• getDay()
• getUTCDay()
• getHours()
• getUTCHours()
• getMinutes()
• getUTCMinutes()
• getSeconds()
• getUTCSeconds()
• getMilliseconds()
• getUTCMilliseconds()
• getTimeZoneOffset()
• setTime(time)
• setMilliseconds(ms)
• setUTCMilliseconds(ms)
• setSeconds(sec [, ms])
• setUTCSeconds(sec [, ms])
• setMinutes(min [, sec [, ms]])
• setUTCMinutes(min [, sec [, ms]])
• setHours(hour [, min [, sec [, ms]]])
• setUTCHours(hour [, min [, sec [, ms]]])
• setDate(date)
• setUTCDate(date)
• setMonth(month [, date])
• setUTCMonth(month [, date])
• setYear(year)
• setFullYear(year [, month [, date]])
• setUTCFullYear(year [, month [, date]])
• toUTCString()
• toGMTString()
• toISOString()
• toJSON()
• [Symbol.toPrimitive](hint)

Additionally, the QML engine adds the following functions to the Date prototype:

• timeZoneUpdated()
• toLocaleDateString(locale, format)
• toLocaleString(locale, format)
• toLocaleTimeString(locale, format)

RegExp Objects

RegExp Prototype Object

Function Properties

• exec(string)
• test(string)
• toString()

Error Objects

Error Prototype Object

Value Properties

• name
• message

Function Properties

• toString()

The JSON Object

Function Properties

• parse(text [, reviver])
• stringify(value [, replacer [, space]])