jellyfin-web/dashboard-ui/bower_components/paper-behaviors/demo/paper-radio-button.html

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<link rel="import" href="../../polymer/polymer.html">
<link rel="import" href="../paper-checked-element-behavior.html">

<dom-module id="paper-radio-button">

  <style>
  :host {
    display: inline-block;
    white-space: nowrap;
  }

  :host(:focus) {
    outline: none
  }

  #radioContainer {
    display: inline-block;
    position: relative;
    width: 16px;
    height: 16px;
    cursor: pointer;
    vertical-align: middle;
  }

  #offRadio {
    position: absolute;
    top: 0px;
    left: 0px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: solid 2px;
    border-color: black;
    transition: border-color 0.28s;
  }

  #onRadio {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: red;
    -webkit-transform: scale(0);
    transform: scale(0);
    transition: -webkit-transform ease 0.28s;
    transition: transform ease 0.28s;
  }

  :host([disabled]) {
    opacity: 0.3;
    pointer-events: none;
  }

  :host([pressed]) #offRadio,
  :host([active]) #offRadio {
    border-color: red;
  }

  :host([pressed]) #onRadio,
  :host([active]) #onRadio {
    -webkit-transform: scale(1);
    transform: scale(1);
  }

  #ink {
    position: absolute;
    top: -16px;
    left: -16px;
    width: 48px;
    height: 48px;
  }

  </style>

  <template>
    <div id="radioContainer">
      <div id="offRadio"></div>
      <div id="onRadio"></div>
    </div>
  </template>

  <script>

    Polymer({

      behaviors: [
        Polymer.PaperCheckedElementBehavior
      ],

      hostAttributes: {
        role: 'radio'
      },

      ready: function() {
        this.toggles = true;
      },

      _createRipple: function() {
        this._rippleContainer = this.$.radioContainer;
        return Polymer.PaperInkyFocusBehaviorImpl._createRipple.call(this);
      }

    });

  </script>

</dom-module>