match a string with regexp in javascript

Question

I have issues with matching a string with regexp in JS. I can use this:

/"[^"]*?"/g

in this string:

" this is a string "

but I can not use that in this:

" this is a \"string\" "

how can i fix that? thanks.

Answer 1

If i understand correct, what you want to do is test is a string is in correct format? so no premature string endings?

If that is the case you could use /"(?:[^"\\\\]|\\\\.)*"/g

Answer 2

[^\\]?(".*?[^\\]")

You can try something like this.You will need to grab the group or capture and not match.See demo.

https://regex101.com/r/nS2lT4/30

or

(?:[^\\]|^)(".*?[^\\]")

See demo.

https://regex101.com/r/nS2lT4/31

Answer 3

In that case you shouldn't use [^"]* also you don't need none-greedy you can use following regex for matching all between 2 quote :

/"(.*)"/g

Demo

And if you want to match anything between " you can simply use a word character matcher with white-space matcher within a character class with a global modifier :

/[\w\s]+/g

Demo

As another way you can use a negative look-behind :

/(?<!\\)"(.*?)(?<!\\)"/