Ignore diacritics not working

[pgranato]

For usage and support questions, please check out resources below, you might find an answer:

• https://www.tablefilter.com/
• https://www.tablefilter.com/docs/
• https://www.tablefilter.com/examples.html
• https://github.com/koalyptus/TableFilter/wiki/
• https://github.com/koalyptus/TableFilter/issues?q=is%3Aissue+is%3Aclosed
• https://codepen.io/koalyptus/pens/public/

[pgranato]

I've installed the last version of TableFilter downloading the script on my server. It works fine (and it's a great library by the way!) but I did not manage to make the ignore_diacritics feature work.

This is the code used to include TableFilter in the page:

<script>
    var tf = new TableFilter(document.querySelector('#persontable'), {
        col_2: 'select',
        col_4: 'select',
        col_5: 'none',
        col_6: 'none',
        col_7: 'none',
        col_8: 'none',
        col_9: 'none',
        col_10: 'select',
        col_11: 'none',
        col_12: 'none',
        col_13: 'none',
        base_path: '../js/tablefilter/',
        ignore_diacritics: true,
        auto_filter: {
            delay: 500 //milliseconds
        },
        filters_row_index: 1,
        rows_counter: true,
        btn_reset: true,
        status_bar: true,
        msg_filter: 'Filtering...'
    });
    tf.init();
</script>

Unfortunately I cannot provide public links to the page as it is in a intranet portal.
As additional note, the page is not HTML5 but uses an old HTML4 template with iso-8859-1 charset.

TableFilter version: 0.6.79
Browser and version: Chrome 73
OS and version: Windows 10

Additional information:

• Problem started happening recently, didn't happen in an older version of
  TableFilter: No
• Problem can be reliably reproduced, doesn't happen randomly: Yes