The JavaScript interpreter defines the following data types.

typedef struct JSContext JSContext

A pointer to this opaque data type passes to the C-level function. Some functions in the API accept this pointer as one of their arguments.

typedef struct JSObject JSObject

A pointer to this opaque data type passes to the C-level function. This data type represents an object, which might be an array object or some other object type.

typedef struct JSVal JSVal

An opaque data structure that can contain an integer, or a pointer to a floating-point number, string, or object. Some functions in the API can read the values of function arguments by reading the contents of a JSVal structure, and some can be used to write the function’s return value by writing a JSVal structure.

typedef enum { JS_FALSE = 0, JS_TRUE = 1 } JSBool

A simple data type that stores a Boolean value.

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