MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
$('.pfUploadable').addClass('font-weight-bold float-right mx-2').css({'position':'sticky','margin-top':'-32px'});
$('.card-body input.formInput').addClass('form-control');
$('.card-body .forminput_button').addClass('mw-ui-button mw-ui-progressive form-control mt-n3').css({'max-width':'unset'}).attr('disabled', 'disabled');

$(document).ready(function() {
  $('.card-body input.formInput').keyup(function() {

    var empty = false;
    $('.card-body input.formInput').each(function() {
        if ($(this).val().length == 0) {
            empty = true;
        }
    });                   

    if (empty) {
        $('.card-body .forminput_button').attr('disabled', 'disabled');
    } else {
        $('.card-body .forminput_button').removeAttr('disabled');
    }                
  });
});