filename or FileHandle
Optionaloptions: { encoding?: null; flag?: OpenMode } & AbortableOptionalreviver: Reviver<any>A function that transforms the results. This function is called for each member of the object. If a member contains nested objects, the nested objects are transformed before the parent object is.
@seereadFile @seeJSON.parse
Asynchronously reads the entire contents of a file that contains a valid JSON string, and converts the content into an object.