验证匹配不能为空

Question

Is it possible that javascript linter will tell if regex will allways produce nonempty match?

s.match(/\w*/)[0]           // valid
s.match(/\w+/)[0]           // invalid
s.match(/id(\d{7})/)[1]     // invalid
s.match(/id(\d{7})|$/)[1]   // valid

PS: Same question in Russian.

Answer 1

No, eslint cannot analyze code like this at least out of the box.

Code linting is a type of static analysis that is frequently used to find problematic patterns or code that doesn't adhere to certain style guidelines.

https://eslint.org/docs/about/

Maybe you could write a plugin to validate those cases.