JavaScript Global Reference
The JavaScript global properties and methods can be used with all JavaScript objects.
JavaScript Global Methods and Properties
Name | Description |
---|---|
decodeURI() | Decodes a URI |
decodeURI Component() |
Decodes a URI component |
encodeURI() | Encodes a URI |
encodeURI Component() |
Encodes a URI component |
escape() | Deprecated. Use instead: encodeURI() encodeURIComponent() |
eval() | Evaluates a string and executes it as if it was script code |
Infinity | A numeric value that represents positive/negative infinity |
isFinite() | Determines whether a value is a finite, legal number |
isNaN() | Determines whether a value is an illegal number |
NaN | "Not-a-Number" value |
Number() | Converts an object's value to a number |
parseFloat() | Parses a string and returns a floating point number |
parseInt() | Parses a string and returns an integer |
String() | Converts an object's value to a string |
undefined | Indicates that a variable has not been assigned a value |
unescape() | Deprecated. Use instead: decodeURI() decodeURIComponent() |
Note
Since these methods are global, and global the object is the browser window, these methods are actually window methods:
isNaN() is the same as window.isNaN().