Adding JS to WordPress can be done in two ways. The first way is to enqueue the JS file.
The second way can be done by adding inline JS via a hook in functions.php – this is most likely used to initialize a script that is enqueued or add Google Tracking codes, Facebook pixels etc.
function my_code_snippet()
{ ?>
<script>
alert('it works');
</script>
<?php
}
add_action('wp_footer', 'my_code_snippet', 100);
Note, the 100 is the priority of where the snippet should go. So, if you want to add a script to the bottom of the page underneath all of the enqueued JS files. Add a large
number to ensure it comes down the bottom.
