Function stringSearch

static/bootstrap-select-1.13.18/js/bootstrap-select.js:422–456

(li, searchString, method, normalize)

  // </editor-fold>

  function stringSearch (li, searchString, method, normalize) {
    var stringTypes = [
          'display',
          'subtext',
          'tokens'
        ],
        searchSuccess = false;

    for (var i = 0; i < stringTypes.length; i++) {
      var stringType = stringTypes[i],
          string = li[stringType];

      if (string) {
        string = string.toString();

        // Strip HTML tags. This isn't perfect, but it's much faster than any other method
        if (stringType === 'display') {
          string = string.replace(/<[^>]+>/g, '');
        }

        if (normalize) string = normalizeToBase(string);
        string = string.toUpperCase();

        if (method === 'contains') {
          searchSuccess = string.indexOf(searchString) >= 0;
        } else {
          searchSuccess = string.startsWith(searchString);
        }

        if (searchSuccess) break;
      }
    }

    return searchSuccess;
  }

  function toInteger (value) {
    return parseInt(value, 10) || 0;