Escaping Literal Quotes in Strings is not running

Tell us what’s happening:
I am receiving this message from JavaScript:

Variable myStr should contain the string: I am a "double quoted" string inside "double quotes".

I have done it as per hint but still not working. I have not idea about how to fix that. How to make the variable to content that string.

Your code so far

var myStr = "I am a\"double quoted\"string inside\"double quotes.\" "; // Change this line

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36.

Link to the challenge:

Look at where the period should be.