convert text with \r\n to html javascript code example

Example 1: javascript replace line breaks with br

function nl2br(str){
 return str.replace(/(?:\r\n|\r|\n)/g, '<br>');
}
var stringWithNewLines= `Well this is a
a very broken
sentance`;
var stringWithBrs=nl2br(stringWithNewLines);
// stringWithBrs= "Well this is a<br>a very <br>broken<br>sentance"

Example 2: 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