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On this page
  • Overview
  • Returned Types
  • Properties Summarized
  • Methods Summarized
  • Properties Detailed
  • Infinity
  • NaN
  • undefined
  • Methods Detailed
  • decodeURI(encodedURI)
  • decodeURIComponent(encodedURI)
  • encodeURI(URI)
  • encodeURIComponent(URI)
  • eval(expression)
  • isFinite(n)
  • isNaN(value)
  • isXMLName(name)
  • parseFloat(text)
  • parseInt(text)
  • parseInt(text, radix)

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  1. Reference
  2. Servoy Core
  3. Developer API

JS Lib

PreviousRuntimeWebComponentNextArray

Last updated 2 months ago

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Overview

This class provides essential JavaScript constants and utility functions like Infinity, NaN, and undefined, along with URI encoding/decoding (encodeURI, decodeURIComponent) and string parsing (parseFloat, parseInt). It includes utilities like isFinite and isNaN for value validation and supports dynamic code evaluation through eval.

Returned Types

,,,,,,,,,,,,,,,[Special Operators](./special operators.md),,,,,,

Properties Summarized

Type
Name
Summary

Numeric value representing infinity.

Value representing Not-a-Number.

The value undefined.

Methods Summarized

Type
Name
Summary

Decodes a URI previously encoded with encodeURI or another similar routine.

Decodes a URI component previously created by encodeURIComponent or by a similar routine.

Encodes a URI by replacing certain characters with escape sequences.

Encodes a URI component by replacing all special characters with their corresponding UTF-8 escape sequences.

Evaluates JavaScript code passed as a string.

Returns true if the given number is a finite number.

void

The NaN property indicates that a value is 'Not a Number'.

Returns true if the given name can be used as a valid name for an XML element or attribute.

Makes a floating point number from the starting numbers in a given string.

Makes a integer from the starting numbers in a given string in the base specified.

Makes a integer from the starting numbers in a given string in the base specified.

Properties Detailed

Infinity

Numeric value representing infinity.

Sample

Infinity

NaN

Value representing Not-a-Number.

Sample

NaN

undefined

The value undefined.

Sample

undefined

Methods Detailed

decodeURI(encodedURI)

Decodes a URI previously encoded with encodeURI or another similar routine.

Parameters

Sample

var str = "http://www.mysite.com/my code.asp?name=[cool]";
var encoded = encodeURI(str);
var decoded = decodeURI(encoded);
application.output(encoded);//http://www.mysite.com/my%20code.asp?name=%5bcool%5d
application.output(decoded);//http://www.mysite.com/my code.asp?name=[cool]

decodeURIComponent(encodedURI)

Decodes a URI component previously created by encodeURIComponent or by a similar routine.

Parameters

Sample

var str = "my code.asp?name=[cool]";
var encoded = encodeURIComponent(str);
var decoded = decodeURIComponent(encoded);
application.output(encoded); //my%20code.asp%3fname%3d%5bcool%5d
application.output(decoded); //my code.asp?name=[cool]

encodeURI(URI)

Encodes a URI by replacing certain characters with escape sequences.

Parameters

Sample

var str = "http://www.mysite.com/my code.asp?name=[cool]";
var encoded = encodeURI(str);
var decoded = decodeURI(encoded);
application.output(encoded);//http://www.mysite.com/my%20code.asp?name=%5bcool%5d
application.output(decoded);//http://www.mysite.com/my code.asp?name=[cool]

encodeURIComponent(URI)

Encodes a URI component by replacing all special characters with their corresponding UTF-8 escape sequences.

Parameters

Sample

var str = "my code.asp?name=[cool]";
var encoded = encodeURIComponent(str);
var decoded = decodeURIComponent(encoded);
application.output(encoded); //my%20code.asp%3fname%3d%5bcool%5d
application.output(decoded); //my code.asp?name=[cool]

eval(expression)

Evaluates JavaScript code passed as a string. Returns the value returned by the evaluated code.

Parameters

Sample

eval("var x = 2 + 3;");
application.output(x); // prints: 5.0

isFinite(n)

Returns true if the given number is a finite number.

Parameters

Sample

application.output(isFinite(1)); // prints: true
application.output(isFinite(Infinity)); // prints: false
application.output(isFinite(isNaN)); // prints: false

isNaN(value)

The NaN property indicates that a value is 'Not a Number'.

Parameters

Returns: void

Sample

isNaN( value )

isXMLName(name)

Returns true if the given name can be used as a valid name for an XML element or attribute. This was implemented by the Rhino engine as part of Ecma-357 which was meanwhile withdrawn.

Parameters

Sample

application.output(isXMLName("good_name")); // prints: true
application.output(isXMLName("bad name")); // because of the space, prints: false

parseFloat(text)

Makes a floating point number from the starting numbers in a given string.

Parameters

Sample

parseFloat('string')

parseInt(text)

Makes a integer from the starting numbers in a given string in the base specified.

Parameters

Sample

parseInt('0774')

parseInt(text, radix)

Makes a integer from the starting numbers in a given string in the base specified.

Parameters

Sample

parseInt('0774' , 8)

Type

Type

Type

encodedURI ;

Returns:

encodedURI ;

Returns:

URI ;

Returns:

URI ;

Returns:

expression ;

Returns:

n ;

Returns:

value ;

name ;

Returns:

text ;

Returns:

text ;

Returns:

text ;

radix ;

Returns:

Boolean
String
Date
Number
Array
Function
IterableValue
Iterator
JSON
Map
Math
Namespace
QName
RegExp
Set
Statements
XML
XMLList
BigInt
Promise
Number
Number
Object
String
String
String
String
String
String
String
String
String
Object
Number
Boolean
Object
String
Boolean
String
Number
String
Number
String
Number
Number
Number
Number
Object
String
String
String
String
Object
Boolean
Boolean
Number
Number
Number
Infinity
NaN
undefined
decodeURI(encodedURI)
decodeURIComponent(encodedURI)
encodeURI(URI)
encodeURIComponent(URI)
eval(expression)
isFinite(n)
isNaN(value)
isXMLName(name)
parseFloat(text)
parseInt(text)
parseInt(text, radix)