External Javascript

Hi,
I am using CI4

My preferred way of using javascript/jquery is to use external .js files

Code:

<script src="<?php echo base_url('includes/common/js/myfunctions.js'); ?>" ></script>

rather than including the javascript/jquery in the page

Code:

$.ajax({
    type: "POST",
    processData: false, // important
    contentType: false, // important
    data: data,
    url: "<?= base_url('file/function'); ?>",
    dataType: "script",
    beforeSend: function() {
        $('.processing').show();
    },
    complete: function() {
        $('.processing').hide();
    },
    success: function (data) {
        alert(data);            
    },
    error: function(data) {
        alert('error '+data);
    },
});

Does codeigniter 4 address any of the obvious issues that would arise is if I was to use try and use codeigniter helpers like base_url() in an external js file???