Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/system/js/system.modules.js

@@ -0,0 +1,84 @@
+/**
+ * @file
+ * Module page behaviors.
+ */
+
+(function ($, Drupal) {
+
+  "use strict";
+
+  /**
+   * Filters the module list table by a text input search string.
+   *
+   * Additionally accounts for multiple tables being wrapped in "package" details
+   * elements.
+   *
+   * Text search input: input.table-filter-text
+   * Target table:      input.table-filter-text[data-table]
+   * Source text:       .table-filter-text-source
+   *
+   * @type {Drupal~behavior}
+   */
+  Drupal.behaviors.tableFilterByText = {
+    attach: function (context, settings) {
+      var $input = $('input.table-filter-text').once('table-filter-text');
+      var $table = $($input.attr('data-table'));
+      var $rowsAndDetails;
+      var $rows;
+      var $details;
+      var searching = false;
+
+      function hidePackageDetails(index, element) {
+        var $packDetails = $(element);
+        var $visibleRows = $packDetails.find('table:not(.sticky-header)').find('tbody tr:visible');
+        $packDetails.toggle($visibleRows.length > 0);
+      }
+
+      function filterModuleList(e) {
+        var query = $(e.target).val().toLowerCase();
+
+        function showModuleRow(index, row) {
+          var $row = $(row);
+          var $sources = $row.find('.table-filter-text-source');
+          var textMatch = $sources.text().toLowerCase().indexOf(query) !== -1;
+          $row.closest('tr').toggle(textMatch);
+        }
+        // Search over all rows and packages.
+        $rowsAndDetails.show();
+
+        // Filter if the length of the query is at least 2 characters.
+        if (query.length >= 2) {
+          searching = true;
+          $rows.each(showModuleRow);
+
+          // Note that we first open all <details> to be able to use ':visible'.
+          // Mark the <details> elements that were closed before filtering, so
+          // they can be reclosed when filtering is removed.
+          $details.not('[open]').attr('data-drupal-system-state', 'forced-open');
+
+          // Hide the package <details> if they don't have any visible rows.
+          // Note that we first show() all <details> to be able to use ':visible'.
+          $details.attr('open', true).each(hidePackageDetails);
+        }
+        else if (searching) {
+          searching = false;
+          $rowsAndDetails.show();
+          // Return <details> elements that had been closed before filtering
+          // to a closed state.
+          $details.filter('[data-drupal-system-state="forced-open"]')
+            .removeAttr('data-drupal-system-state')
+            .attr('open', false);
+        }
+      }
+
+      if ($table.length) {
+        $rowsAndDetails = $table.find('tr, details');
+        $rows = $table.find('tbody tr');
+        $details = $rowsAndDetails.filter('.package-listing');
+
+        $input.on('keyup', filterModuleList);
+      }
+    }
+  };
+
+}(jQuery, Drupal));