A simple way to replace line break and spaces on a text area content can be done simply by replacing the line break value and the space value with the corresponding html tag as following .
function replaceLineBreaksAndSpaces(textValue) {
   textValue = replaceSpaceCharacter(replaceLineBreak(textValue));
   return textValue;
}
    
function replaceLineBreak(textValue) {
    textValue = textValue.replace(/\r?\n/g, ' 
      <br />');
    return textValue;
}
function replaceSpaceCharacter(textValue) {
    textValue = textValue.replace(/  /g, '  ');
    return textValue;
} 
