Node module. typeOf('a string') == 'string', typeOf([]) == 'array', etc.. Also supports named functions detections aka javascript classes
This transformer wraps all typeof expressions with a method that replicates native behaviour. (ie. returning “symbol” for symbols)
Determine if the JS environment has Symbol support. Supports spec, or shams.
Returns true if an object was created by the Object
constructor, or Object.create(null).