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Page History: TextArea MaxLength Enforcement - jQuery

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Page Revision: Wed, Jan 19, 2011, 2:19 PM


The following JavaScript function, which is dependent on jQuery, enforces the maxlength attribute for all textarea elements on the current page.

{copytext|js}
function enforceTextAreaMaxLen() {

    $('textarea[maxlength]').keyup(function () {

        var textbox = $(this);
        var maxlength = textbox.attr('maxlength');

        if (maxlength != undefined) {

            var x = parseInt(maxlength);
            var s = textbox.val();
            if (s != null && s.length > x) {
                textbox.val(s.substring(0, x));
            }
        }
    });
}

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