Regular Expressions matching single-row and multi-row comments with javascipt

When using node. js. If you want to add notes when using the. json file to store some configurations.

However, because the string is read and then converted to a JSON object using json. parse, the conversion fails or even reports an error because of the existence of annotations.

The regular expression matches the comments in the string, including single-line and multi-line comments.
Copy codeThe Code is as follows:
(/\ * ([^ *] | [\ R \ n] | (\ * + ([^ */] | [\ r \ n]) * \ * +/) | (//. *)

Test address:
Http://gskinner.com/RegExr? 30jrh
Note that when using it as a string's regular expression, be sure to use escape character \

Therefore, you need to write as follows:
Copy codeThe Code is as follows:
Var reg = "(// \ * ([^ *] | [\ r \ n] | (\ * + ([^ */] | [\ r \ n]) * \ * +/) | (//. *)";
Var exp = new RegExp (reg, "g ");

\ Represents \