I'd point out that ES5 spec contains the core of the JS language in 258 pages. Following the JS spec alone, it would probably be hard to find any code on the e

I'd point out that ES5 spec contains the core of the JS language in 258 pages. Following the JS spec alone, it would probably be hard to find any code on the entire internet before 2015 that wouldn't run on your implementation (even though it would undoubtedly run slower). In contrast, if you followed only the go spec, ZERO go code out there would actually run because it doesn't include the rest of the language and core features.