List.js not working when using an ampersand (&) in value

Question

When using an ampersand, either explicitly as & or using HTML character codes as &, List.js breaks. Here's the code, working for the first filter, but not for the second:

$(function() {

  var options = {
    valueNames: ["name", "category"]
  };

  var userList = new List("search-results", options);
  var activeFilters = [];

  // filter
  $(".filter").change(function() {
    var isChecked = this.checked;
    var value = $(this).data("value");

    if (isChecked) {
      // add to list of active filters
      activeFilters.push(value);
    } else {
      // remove from active filters
      activeFilters.splice(activeFilters.indexOf(value), 1);
    }
    userList.filter(function(item) {
      if (activeFilters.length > 0) {
        return activeFilters.indexOf(item.values().category) > -1;
      }
      return true;
    });
  });

});

* {
  margin: 0;
  padding: 0;
  font-family: monaco;
}

body {
  margin: 0;
  padding: 10px;
  background: lightgreen;
}

ul {
  padding: 10px;
  list-style: none;
  color: white;
  background: blue;
}

ul span {
  margin-left: 4px
}

li {
  margin: 10px 0
}

.list {
  padding: 10px;
  background: steelblue;
}

.package {
  margin-bottom: 10px;
  background: pink;
}

.package .text {
  display: block;
}

.package .category {
  background: salmon;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/list.js/1.1.0/list.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<ul>
  <li class="checkbox-btn">
    <label>
      <input class="filter" type="checkbox" name="history" data-value="History" /><span>History</span>
    </label>
  </li>
  <li class="checkbox-btn">
    <label>
      <input class="filter" type="checkbox" name="arts & crafts" data-value="Arts & Crafts" /><span>Arts & Crafts</span>
    </label>
  </li>
</ul>

<div class="results-container">
  <div id="search-results">
    <div class="list">

      <div class="package">
        <span class="text">Placeholder Text</span>
        <span class="category">History</span>
      </div>
      
      <div class="package">
        <span class="text">Placeholder Text</span>
        <span class="category">Arts & Crafts</span>
      </div>

      <div class="package">
        <span class="text">Placeholder Text</span>
        <span class="category">History</span>
      </div>
      
      <div class="package">
        <span class="text">Placeholder Text</span>
        <span class="category">Arts & Crafts</span>
      </div>
      
    </div>
  </div>
</div>

Any ideas on how to allow an ampersand as the filtered category name? Thanks.

Answer 1

The browser replaces & for &, so you need to replace back on the filter function:

return activeFilters.indexOf(item.values().category.replace(/&/g, "&")) > -1;