One exception is trailing-commas. Another is leading 0 in numbers for example
-02. The former is for practicality. The latter is for compatibility with DynamicJson.
The grammar of JSON is simple, but carelessly implemented parsers don't accept all conformant and not reject non-conformant JSONs. An excellent article of Parsing JSON is a Minefield shows where mines are in implementing JSON parsers.Continue reading "How to Make JSON Parser Strict"