Appendix C. ECMAScript Reserved Keywords

All of the words in the following table are reserved for use by the ECMAScript interpreter built into scriptable browsers. You may not use these words as identifiers for variables, functions, or objects. A majority of these words are already used by current implementations of JavaScript, while others may become part of the vocabulary in future versions:

abstract	boolean	break	byte
case	catch	char	class
const	continue	debugger	default
delete	do	double	else
enum	export	extends	final
finally	float	for	function
goto	if	implements	import
in	instanceof	int	interface
long	native	new	package
private	protected	public	return
short	static	super	switch
synchronized	this	throw	throws
transient	try	typeof	var
void	volatile	while	with