Render the <option>s by the settings.

renderOptions.js

/**
 * Redner the <option>s by the settings
 */

function isObject(o) {
  return Object.prototype.toString.call(o) === '[object Object]';
}

function renderOptions(settings) {
  var options = settings.options || [];
  var selectedOptions = settings.selectedOptions || [];
  var disabledOptions = settings.disabledOptions || [];
  var html = '';

  if (!isObject(options[0])) {
    options = options.map(function (option) {
      return {
        label: option,
        value: option
      };
    });
  }

  for (var i = 0; i < options.length; i++) {
    var option = options[i];
    var selected = option.selected !== undefined ?
                  option.selected :
                  selectedOptions.indexOf(option.value) > -1;
    var disabled = option.disabled !== undefined ?
                  option.disabled :
                  disabledOptions.indexOf(option.value) > -1;

    html += '<option value="' + option.value + '"' +
            (selected ? 'selected' : '') +
            (disabled ? 'disabled' : '') +
            '>' + option.label + '</option>';
  }

  return html;
}