How to backreference group when using or in regex?-CodePudding

I am using TypeScript and I want to remove all the comments from the code using regex. Here's my sample code:

// this is awesome code
const a =1

// this is nice
const b = 2 // oh great


  // with some indentation
const x = 99

I want to preserve the new lines as it is and want to remove all the lines so final output should look like the below:

const a =1

const b = 2


const x = 99

To achieve above I have to write regex: ^( *\/\/.*)\n|( *\/\/.*)

The question is how can I backreference the first group after or | condition? I can't do ^( *\/\/.*)\n|(\1).

P.S. I am using regex101.com for testing

Thanks.

CodePudding user response：

You can search using this regex:

^[ \t]*\/\/.*\r?\n|[ \t]*\/\/.*

And replace with empty string.

RegEx Details: