have values, secondary progress values, or be disabled.</h3>
    <demo-snippet>
      <template>
        <paper-slider value="21"></paper-slider>
        <paper-slider value="0"></paper-slider>
        <paper-slider value="50" secondary-progress="85"></paper-slider>
        <paper-slider disabled="" value="33"></paper-slider>
      </template>
    </demo-snippet>

    <h3>They can be editable, and styled using custom properties</h3>
    <demo-snippet>
      <template>
        <style is="custom-style">
     