Question

How to convert lines in a multiline string starting with some "#" to start and end with "_" in Node.js

Answer 1

let str = "###Word1 Word2\nWord3\n##Word4 Word5 Word6\n#Word7\nWord8 Word9\n";

str = str.replace(/#+(.*)\n/g, "_$1_\n");

console.log(str);

   
/*
run:
    
_Word1 Word2_
Word3
_Word4 Word5 Word6_
_Word7_
Word8 Word9
       
*/

 

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