Pass PHP variable to "file" javascript

Question

I can pass a variable PHP for javascript if it is on the same page, but the problem is that if I throw this code to a file JS it doesn’t work.

Answer 1

Yes you can do as long as javascript is not coming from an external source.

PHP page

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>

<script type="text/javascript">var param = "<?= $pagina ?>";</script>

<script type="text/javascript" src="js/paginacao.js"></script>

paginacao.js

jQuery(document).ready(function(){
    var pagina = param;
    jQuery('#btnpaginas').click(function(){
        pagina++;
        var dados = jQuery( this ).serialize();

        jQuery.ajax({
            type: "POST",
            url: "paginacao.php?pagina="+pagina,
            data: dados,
            success: function(data)
            {
                $(".paginacao").html(data);

            }
        });
        return false;
    });
});

Answer 2

I believe that there is no way to pass variables of the PHP to an archive .js external and static, since the processing is done in the file itself .php that is being executed.