Answers for "trim also removes enter from string in javascript"

javascript remove line breaks from string

var stringWithLineBreaks = `
O boy 
I've got 
Breaks
`;
var stringWithoutLineBreaks = stringWithLineBreaks.replace(/(\r\n|\n|\r)/gm, "");//remove those line breaks

javascript remove final newline from string

// Remove the trailing newline(s) from a string
str.replace(/\n*$/, "");