Vue 2.0 Hello World - JSFiddle

HTML

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<script src="https://unpkg.com/vue/dist/vue.js"></script>
​
<div id="app">
  <wrapper></wrapper>
</div>
​
​
<template id="wrapper">
  <slide-deck>
    <slide>
      <p data-order="0">First paragraph</p>
      <p data-order="1">Second paragraph Hello from second fragment</p>
    </slide>
​
    <slide>
      <p data-order="0">First paragraph 2nd slide</p>
      <p data-order="1">Second paragraph 2nd slide</p>
    </slide>
  </slide-deck>
</template>
​

Babel + JSX

Module

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Vue.component('slide-deck', {
  data() {
   return {
    currentSlideIndex: 0,
    currentFragmentIndex: 0,
    numFragmentsPerSlide: [2,2]
   }
  },
  computed: {
    slideComponents() {
      return this.$slots.default.filter(slot => slot.tag)
    },
    currentSlide() {
      return this.slideComponents[this.currentSlideIndex]
    }
  },
  
  mounted () {
    window.addEventListener('keydown', this.handleKeydown);
        this.updateVisibilities();
  },
  destroyed() {
    window.removeEventListener('keydown', this.handleKeydown);
  },
  methods: {
    handleKeydown(e) {
      if (e.code === 'ArrowRight') {
        this.increaseFragmentOrSlide()
      } else if (e.code === 'ArrowLeft') {
        this.decreaseFragmentOrSlide()
      }
    },
​
    increaseFragmentOrSlide() {
      if (this.currentFragmentIndex < this.numFragmentsPerSlide[this.currentSlideIndex] - 1) {
        this.currentFragmentIndex +=1
        console.log('increased fragment index:', this.currentFragmentIndex)
      } else if (this.currentSlideIndex < this.numFragmentsPerSlide.length - 1){
        this.currentSlideIndex += 1
        this.currentFragmentIndex = 0
        console.log('increased slide index:', this.currentSlideIndex)        
       }
      this.updateVisibilities()
    },
    
    decreaseFragmentOrSlide() {
      if (this.currentFragmentIndex > 0) {
        this.currentFragmentIndex -=1
        console.log('decreased fragment:', this.currentFragmentIndex)
      } else if (this.currentSlideIndex > 0) {
        this.currentSlideIndex -= 1
        this.currentFragmentIndex = 0
        console.log('decreased slide:', this.currentSlideIndex)                
       }
      this.updateVisibilities()     
    },
    
    updateVisibilities() { 
      // this.$forceUpdate() // hack
      this.$nextTick(() => {
        const validElements = this.currentSlide.componentOptions.children.filter(child => child.tag)
        validElements.forEach(child => {
          console.log(child, child.elm)
          child.elm.dataset['hidden'] = child.elm.dataset['order'] > this.currentFragmentIndex
          console.log('data-order', child.elm.dataset['order'], 'data-hidden', child.elm.dataset['hidden'])
        })
      })
    }
  },
  
  render(h) {
    return h('div',{}, [this.currentSlide])
  }
})
​
Vue.component('slide', {
  render(h) {
    return h('div',{}, this.$slots.default)
  }
})
​
​
Vue.component('wrapper', {
  template: '#wrapper',
});
​
new Vue({
  el: '#app'
});

CSS

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[data-hidden="true"] {
  color: grey
}

608px

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"[Line 23] Uncaught ReferenceError: Vue is not defined"

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