(*) new reserved words in ECMAScript5
Some words have been reserved according to the ECMAScript specification so that they cannot be used as variable names, although currently, they do not have any functionality. These keywords may or may not be reserved words for some ECMAScript specification, and are grouped according to their condition of being reserved.
Words that are always reserved
Words that are reserved in strict mode
Words that were reserved in ECMAScript standards 1-3
- "ECMA-262 5.1: ECMAScript Language Specification" 2011, Section 7.6.1: Reserved Words, (keywords, the two Boolean literals, the null literal, and future reserved words).