<dotAll>
The [any]value (or . in regex) in regcode matches almost anything, except for newlines ([newline] in regcode, \n in regex). the dotAll flag allows [any] to match newlines as well.
Usage
<dotAll>
Example
const wordToMatch = "A\nB";
const codeWithoutFlag = "normal(A[any]B)";
const codeWithFlag = "<dotAll> normal(A[any]B)";
regCode.match(codeWithoutFlag, wordToMatch); // null
regCode.match(codeWithFlag, wordToMatch); // "A\nB"
Regex
//s