jQuery可在jsFiddle中使用，但不适用于Drupal

Question

Good Evening, I am pretty new to jQuery, and therefore would like you to forgive me if I am asking a stupid question, but apparently I've been facing the following problem, which I think I cannot solve by myself.

I am trying to implement jQuery code to change the order of columns a table has. The code is as follows:

$(document).ready(function (table, from, to) {
    var rows = jQuery('tr', table);
    var cols;
    rows.each(function () {
        cols = jQuery(this).children('th, td');
        cols.eq(from).detach().insertBefore(cols.eq(to));
    });
}(jQuery('#changeorder'), 1, 0));

It works perfectly Having a table with the id "changeorder" in jsFiddle, but doesn't work on Drupal website. I also tried removing the $(document).ready part, and adding (jQuery); at the end, the same result.

I tried adding the code to the html.tpl.php, just after the inclusion of jQuery javascript:

<!-- jQuery library (served from Google) -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>

<script> 
$(document).ready(function (table, from, to) {
var rows = jQuery('tr', table);
var cols;
rows.each(function () {
cols = jQuery(this).children('th, td');
cols.eq(from).detach().insertBefore(cols.eq(to));
});}(jQuery('#changeorder'), 1, 0));
</script>

And I have also tried adding the content directly to the page where I need it with the drupal_add_js(). Still no progress.

Any idea on what I'm doing wrong?

Thanks beforehand.

Answer 1

You should be wrapping your entire JS in (function ($) {})(jQuery); Then using your $ in place of your jQuery instances...drupal has always liked this better for me.

I would also suggest converting this into a function that you can call when needed instead of passing your variable straight to the document ready like you currently are.

(function ($) {

$(document).ready(function() {
  function tableChange(table, from, to){ 
    var rows = $('tr', table);
    var cols;
    rows.each(function () {
    cols = $(this).children('th, td');
    cols.eq(from).detach().insertBefore(cols.eq(to));
  };
  tableChange('#changeorder', 1, 0)
});

})(jQuery);

In my experience best practice for drupal should not be adding your scripts to your html.tpl but instead you should be adding to yourtheme.info file:

scripts[] = yourjsfiles/script.js

Then in the script.js file you can have something like the following:

(function ($, Drupal, window, document, undefined) {
    $(document).ready(function(){
    //your code here
    }); 
})(jQuery, Drupal, this, this.document);

You want to try and avoid cluttering up you .tpl files. You will thank me for this in the long run :)

edit: I just noticed in your question the inclusion of jquery. This cannot be done in the manner you are attempting to do it. By default Drupal 7 uses jquery 1.4.4 and the way to update this would be the jQuery Update Module