<html lang="en"><head><title>jQuery Selectors Select Element By Multiple Classes</title><script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script><script type="text/javascript">$(document).ready(function(){ $(".txt-para1.txt-para2").css("background", "blue");});</script></head><body><h2>jQuery Selectors Select Element By Multiple Classes</h2><p class="txt-para1 txt-para2">This is a paragraph.</p></body></html>