To replace the newlines with spaces, use the JavaScript replace() method.
Example
You can try to run the following code to learn how to work with replace() method to replace newlines:
<!DOCTYPE html> <html> <body> <p>Words:</p> <script> var words = "a\nb\nc\nd\ne\nf"; words = words.replace(/\n/g, " "); document.write(words); </script> </body> </html>