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JavaScript global properties and functions can be used with all built-in JavaScript objects.
The following table lists the JavaScript global properties:
| Property | Description |
|---|---|
| Infinity | Indicates a value representing infinity |
| NaN | A value indicating 'not a number' |
| undefined | Indicates that no value has been assigned to the variable |
| null (literal) | Indicates the intentional absence of any object value |
The following table lists the JavaScript global functions:
| Function | Description |
|---|---|
| decodeURI() | Decode URI |
| decodeURIComponent() | Decode URI components |
| encodeURI() | Encode URI |
| encodeURIComponent() | Encode URI components |
| escape() | Not recommended for use.UseIs encodeURI()OrencodeURIComponent method ()Replace |
| eval() | Execute the string passed in as JavaScript code. |
| isFinite() | Determine if the passed value is a finite number |
| isNaN() | Determine if the value is NaN |
| Number() | Convert the value of the object to a number |
| parseFloat() | Parse a string and return a floating-point number |
| parseInt() | Parse a string and return an integer |
| String() | Convert the value of the object to a string |
| unescape() | Not recommended for use.UsedecodeURI()OrdecodeURIComponent()Replace |