Timeout errors with javascript regex

Question

I have a content with <del></del> and <ins></ins> tags. I have a regex which satisfies the conditions which are clearly explained in the image

The regex which satisfies the conditions is:

• https://regex101.com/r/cE4mE3/19

This regex is working perfectly fine. But, when the content is more or When the matching content is long the execution time is increasing and hence throwing a timeout error which can be seen in

• https://regex101.com/r/cE4mE3/20

How to simplify the regex

(\w*(?:(?:(?:<del\b[^>]*>(?:(?!<\/del>).)*<\/del>)|(?:<ins\b[^>]*>\w+<\/ins>)|(?:\w+<\/ins>)|(?:<ins\b[^>]*>\w+))(?:\w+|))+) 

to avoid it from throwing timeout error?

Answer 1

Regex is not correct way to do this.You yourself have discovered a pitfall. There will be more.So switch to DOM parser .As for removing the timeout issue , you can try

((?=(\w*))\2(?:(?:(?:<del\b[^>]*>(?:(?!<\/del>).)*<\/del>)|(?:<ins\b[^>]*>\w+<\/ins>)|(?:\w+<\/ins>)|(?:<ins\b[^>]*>\w+))(?:\w+|))+)

See demo.

https://regex101.com/r/cE4mE3/24