MediaWiki:Common.js

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// Display current page in breadcrumbs
$(document).ready(function() {
  var breadcrumbs = $('#mw-content-subtitle');
  
  if (breadcrumbs.length) {
    // Get the current page title
    var currentTitle = mw.config.get('wgPageName');
    
    // Create a breadcrumb item for the current page
    var currentItem = $('<span class="breadcrumb-current"></span>')
      .text(mw.config.get('wgTitle'));
    
    // Add separator and current page
    breadcrumbs.append('<span class="breadcrumb-separator"> > </span>').append(currentItem);
  }
});