Edit in JSFiddle

new Vue( {
  el: '#slider',
  components: {
  	'Slider': window[ 'vue-easy-slider' ].Slider,
    'SliderItem': window[ 'vue-easy-slider' ].SliderItem
  }
} )

<div id="slider">
  <slider animation="fade"
          :speed="1000">
    <slider-item :style="{ backgroundColor: '#3f51b5' }"></slider-item>
    <slider-item :style="{ backgroundColor: '#eee' }"></slider-item>
    <slider-item :style="{ backgroundColor: '#f44336' }"></slider-item>
  </slider>
</div>