Now, let's discuss the code that we previously used. We used the following function in our code:

jQuery(document).ready(function(){
//our codes. 
});

This is a jQuery function that allows you to set your jQuery ready to be used. You can replace jQuery with a dollar sign ($) as shown in the following:

$(document).ready(function(){
//our codes.
});

You need to think where you want to apply jQuery. We have written <h1>Click Here!</h1> in our body tags. We wanted our Click Here! to do something when clicked and that's why we added a click function similar to the following format:

  jQuery('h1').click(function(){
    //our codes.
  });

The jQuery can be replaced with $ as earlier mentioned.

We added an alert function so that when we click on our text, there appears an alert box.