search.addWidgets([
  instantsearch.widgets.dynamicWidgets({
    container: '#dynamic-widgets', // CSS Selector
    widgets: [
      container =>
      instantsearch.widgets.refinementList({ container, attribute: 'gender' }),
      container =>
      instantsearch.widgets.refinementList({ container, attribute: 'size' }),
      container =>
      instantsearch.widgets.rangeInput({ container, attribute: 'price' })
    ]
  })
]);