Answers for "multi select dropdown search with dynamically add options"

multiple search selection dropdown

<div class="row">
  <div class="col-md-12">

    <select class="mdb-select colorful-select dropdown-primary md-form" multiple searchable="Search here..">
      <option value="" disabled selected>Choose your country</option>
      <option value="1">USA</option>
      <option value="2">Germany</option>
      <option value="3">France</option>
      <option value="4">Poland</option>
      <option value="5">Japan</option>
    </select>
    <label class="mdb-main-label">Label example</label>
    <button class="btn-save btn btn-primary btn-sm">Save</button>

  </div>
</div>

select2 dropdown with option to add new item

$('#select2')
    .select2()
    .on('select2:open', () => {
        $(".select2-results:not(:has(a))").append('<a href="#" style="padding: 6px;height: 20px;display: inline-table;">Create new item</a>');
})