Question

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

Answer 1

let str = "###Word1 Word2\nWord3\nWord4 Word5 Word6\n##Word7\n#Word8 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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