| Value | Meaning | 
|---|---|
| undefined | A non-existent value in a JSON object  | 
| null_ | Null value  | 
| bool_ | Boolean value  | 
| int_ | 64-bit integer value  | 
| bigInt | BigInt values  | 
| float_ | 64-bit floating point value  | 
| string | UTF-8 string  | 
| array | Array of JSON values  | 
| object | JSON object aka. dictionary from string to Json  | 
| Undefinedundefined | Deprecated: Use `undefined` instead. Compatibility alias  | 
| Nullnull_ | Deprecated: Use `null_` instead. Compatibility alias  | 
| Boolbool_ | Deprecated: Use `bool_` instead. Compatibility alias  | 
| Intint_ | Deprecated: Use `int_` instead. Compatibility alias  | 
| Floatfloat_ | Deprecated: Use `float_` instead. Compatibility alias  | 
| Stringstring | Deprecated: Use `string` instead. Compatibility alias  | 
| Arrayarray | Deprecated: Use `array` instead. Compatibility alias  | 
| Objectobject | Deprecated: Use `object` instead. Compatibility alias  | 
Represents the run time type of a JSON value.