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<!DOCTYPE html> <html lang="en"> <head> <title>Learning jQuery</title> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script> </head> <body> <h1>Hello World </h1> </body> </html>
/* CSS */
$(document).ready(function(){ //Change background of all h1 elements $("h1").css("background", "yellow"); });