vaadin-date-picker theme

custom theme for buttons

HTML

<base href="https://polygit.org/vaadin-date-picker+vaadin+3.0.0-alpha3/vaadin-text-field+vaadin+2.0.0-alpha5/vaadin-button+vaadin+2.0.0-alpha3/vaadin-material-theme+:master/polymer+^2.0.0/components/">
<script src="webcomponentsjs/webcomponents-lite.js"></script>

<link rel="import" href="vaadin-date-picker/vaadin-date-picker.html">

<dom-module id="custom-date-picker-styles" theme-for="vaadin-date-picker">
  <template>
    <style include="material-date-picker">
      [part="clear-button"] {
        display: none;
      }
      
      [part="toggle-button"]::before {
        content: var(--valo-icons-dropdown);
      }
    </style>
  </template>
</dom-module>

<vaadin-date-picker></vaadin-date-picker>