Escape Sequences in Strings Not Working

Tell us what’s happening:
I’ve read all the hints and watched the video on YouTube, but it still does not work though it looks correct.

Your code so far

var myStr;//"FirstLine\n\\SecondLine\\\rThirdLine";

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:58.0) Gecko/20100101 Firefox/58.0.

Link to the challenge:
https://www.freecodecamp.org/challenges/escape-sequences-in-strings

Thank you. When I used the = sign it assigned the value. Now it works.