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HTML

              
                <main id="app">
  <h1 class="h1">Grab a beer&trade;</h1>
  <p class="p">Cycle through BrewDog’s beer offering, compare them and find your favourite!</p>
  <div class="cards">
    <div class="card-controls">
      <button
        @click="showBeer(`prev`)"
              
        class="btn"

        :disabled="!nextPrev.prev"
        v-html="`Prev`"
      />
      <button
        @click="showBeer(`next`)"
              
        class="btn"

        :disabled="!nextPrev.next || loading"
        v-html="loading ? `Getting more beers` : `Next`"
      />
      <button
        @click="setSaved(current)"
              
        class="btn btn--save"

        v-html="`Save`"
      >
    </div>
    <div class="card-wrapper">
      <module-card
        :beer="beers[saved]"
        :compare="beers[current]"
      />
    </div>
    <div class="card-wrapper">
      <!-- TODO: Work out why these components need wrappers -->
      <div>
        <module-card
          :beer="beers[current]"

          @select-beer="setSaved($event)"
          @show-beer="showBeer($event)"
        />
      </div>
    </div>
  </div>
  <!--<div>
    <pre>Loading: {{ loading }}</pre>
    <pre>Count: {{ beersLength }}</pre>
    <pre>Saved: {{ saved }}</pre>
    <pre>Page: {{ page }}</pre>
    <pre>Keys: {{ beersKeys }}</pre>
    <pre>Current: {{ current }}</pre>
    <pre>{{ nextPrev }}</pre>
  </div>-->
</main>
              
            
!

CSS

              
                $card-padding: 2rem;
$card-margin: 1rem;
$card-radius: 0.25rem;

$heading-family: 'Lora', serif;

html,
body {
  font-family: 'Open Sans', sans-serif;
  line-height: 1.4;
}

.h1 {
  font-size: 2rem;
  font-weight: 600;
  margin: 1em auto .25em;
  text-align: center;
  font-family: $heading-family;
}

.p {
  font-size: 1rem;
  text-align: center;
  max-width: 20em;
  margin: 0 auto 1em;
}

.cards {
  display: flex;
  flex-wrap: wrap;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  
  &::before {
    content: '';
    display: block;
  }
}

.card-wrapper {
  display: flex;
  flex-direction: column;
  width: 50%;
}

.card-controls {
  width: 100%;
  text-align: center;
}

.card {
  border-radius: $card-radius;
  box-shadow: rgba(black, 0.1) 0 0 0.5rem;
  padding: $card-padding;
  display: block;
  margin: $card-margin;
  position: relative;
  
  &__saved {
    color: red;
    position: absolute;
    top: 0;
    right: 0;
    padding: 0.5em;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    font-size: 0.75rem;
    font-weight: bold;
  }
  
  &__title {
    font-family: $heading-family;
    display: block;
    font-weight: 600;
    font-size: 1.35rem;
    margin: 0 auto 0.25em;
  }
  
  &__abv {
    display: block;
    font-weight: bold;
  }
  
  &__tagline {
    display: block;
    margin: .5em auto 1em;
  }
  
  &__details {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-gap: 0.25rem .5rem;
    margin-bottom: .5em;
    
    dt {
      font-weight: 600;
    }
    
    dd {
      font-variant-numeric: tabular-nums;
      text-align: right;
      overflow: hidden;
      display: flex;
      
      .compared {
        margin-left: .25em;
      }
      
      &::before {
        content: '';
        opacity: 0.25;
        flex: 1;
        margin-right: 1rem;
        background: linear-gradient(white 50%, black 50%) repeat-x center center;
        background-size: 2px 2px;
      }
    }
  }
  
  &__ingredients {
    
    > span {
      font-weight: bold;
    }
    
    > ul {
      
      > li {
        margin-top: .5rem;
      }
      
      ul {
        list-style: disc;
        padding-left: 1.25rem;
      }
    }
  }
  
  > hr {
    height: 1px;
    background: currentColor;
    opacity: 0.1;
    border: 0;
    border-radius: 0;
    margin: $card-padding * 0.75 0 $card-padding * 0.75 $card-padding * -1;
    width: calc(100% + #{$card-padding});
    display: block;
  }
  
  > img {
    max-width: 100%;
  }
}

.btn {
  padding: .5em 1em;
  margin: .5em;
  display: inline-block;
  cursor: pointer;
  
  &--save {
    display: block;
    margin-left: auto;
    margin-right: auto;
    padding: 1em 2em;
  }
  
  &[disabled] {
    opacity: 0.5;
    cursor: default;
  }
}

.compared {
  color: red;
}
              
            
!

JS

              
                const apiPrefix = `https://api.punkapi.com/v2/`;

const ModuleCompared = Vue.component(`module-compared`, {
  // Props
  props: {
    value: {
      type: [
        Number,
        String,
      ],
    },
    decimals: {
      type: Number,
      default: 1,
    },
    unit: {
      type: String,
      default: ``,
    },
  },
  
  // Template
  template: `
    <span class="compared" v-if="value || value === 0">
      <template v-if="value === 0">(=)</template>
      <template v-else-if="typeof(value) === \`string\`">String comparison</template>
      <template v-else>({{ value >= 0 ? \`+\` : \`\` }}{{ value.toFixed(decimals) }}{{ unit ? \` \${unit}\` : \`\` }})</template>
    </span>`,
});

const ModuleCard = Vue.component('module-card', {
  // Components
  components: {
    'module-compared': ModuleCompared,
  },
  
  // Props
  props: {
    beer: {
      type: Object,
      default: () => {},
    },
    compare: {
      type: Object,
      default: () => {},
    },
  },
  
  // Data
  computed: {
    compared() {
      const compare = this.compare;
      const beer = this.beer;
      
      if (!compare || compare.id === beer.id) return {};
      
      console.log(this.compare.name, this.compare);
      
      return {
        abv: compare.abv ? (beer.abv - compare.abv) : false,
        ph: compare.ph ? (beer.ph - compare.ph) : false,
        ibu: compare.ibu ? (beer.ibu - compare.ibu) : false,
        ebc: compare.ebc ? (beer.ebc - compare.ebc) : false,
        volumeValue: beer.volume && compare.volume ? (beer.volume.value - compare.volume.value) : false,
        boilVolumeValue: beer.volume && compare.boil_volume ? (beer.boil_volume.value - compare.boil_volume.value) : false,
      };
    },
  },
  
  // Methods
  methods: {
    onClick() {
      this.$emit(`select-beer`, this.beer.id);
    },
    getSet(set) {
      const map = {
        malt: `Malt`,
        hops: `Hops`,
        yeast: `Yeast`,
      };
      
      return map[set] || set;
    },
  },
  
  // Template
  // template: `<div>Test</div>`;
  template: `
    <div
      v-if="beer"

      :class="[
        \`card\`,
        {
          'card--compare': compare,
        },
      ]"

      @click="onClick"
    >
      <span class="card__saved" v-if="compare">Saved</span>
      <span class="card__title">{{ beer.name }}</span>
      <span class="card__abv">
        {{ beer.abv }}% ABV
        <module-compared :value="compared.abv" />
      </span>
      <span class="card__tagline">{{ beer.tagline }}</span>

      <dl class="card__details">
        <template v-if="beer.ibu">
          <dt><abbr title="International Bitterness Units">IBU</abbr></dt>
          <dd>{{ beer.ibu.toFixed(1) }} <module-compared :value="compared.ibu" /></dd>
        </template>

        <template v-if="beer.ebc">
          <dt><abbr title="European Brewery Convention">EBC</abbr></dt>
          <dd>{{ beer.ebc.toFixed(1) }} <module-compared :value="compared.ebc" /></dd>
        </template>

        <template v-if="beer.ph">
          <dt><abbr title="Acidity">pH</abbr></dt>
          <dd>{{ beer.ph.toFixed(1) }} <module-compared :value="compared.ph" /></dd>
        </template>

        <template v-if="beer.volume">
          <dt><attr title="Volume">Vol.</attr></dt>
          <dd>{{ beer.volume.value }} {{ beer.volume.unit }} <module-compared :value="compared.volumeValue" :unit="beer.volume.unit" :decimals="0" /></dd>
        </template>

        <template v-if="beer.boil_volume">
          <dt><attr title="Boil Volume">Boil Vol.</attr></dt>
          <dd>{{ beer.boil_volume.value }} {{ beer.boil_volume.unit }} <module-compared :value="compared.boilVolumeValue" :unit="beer.boil_volume.unit" :decimals="0" /></dd>
        </template>
      </dl>

      <hr>

      <span class="card__ingredients">
        <span>Ingredients</span>
        <ul>
            <li v-for="(ingredients, set) in beer.ingredients" :key="set">
              <span class="">{{ getSet(set) }}</span>
              <ul>
                <li v-if="typeof(ingredients) === \`string\`">{{ ingredients }}</li>
                <template v-else>
                  <li v-for="(ingredient, index) in ingredients" :key="index">
                    {{ ingredient.name }}
                    <template v-if="ingredient.amount">({{ ingredient.amount.value }} {{ ingredient.amount.unit }})</template>
                  </li>
                </template>
              </ul>
            <li>
        </ul>
      </span>
    </div>`,
});

const app = new Vue({
  el: '#app',
  
  // Components
  components: {
    'module-card': ModuleCard,
  },
  
  // Data
  data() {
    return {
      loading: false,
      beers: {},
      saved: ``,
      current: ``,
      perPage: 10,
      page: 1,
    };
  },
  computed: {
    beersKeys() {
      return Object.keys(this.beers);
    },
    beersLength() {
      return this.beersKeys.length;
    },
    nextPrev() {
      const keys = this.beersKeys;
      const index = keys.indexOf(this.current);
      
      let next = false;
      let prev = false;
      
      if (index >= 0) {
        next = keys[index + 1] || false;
        prev = keys[index - 1] || false;

        // if (prev < 0) prev = false;
        // if (next > this.beersLength) next = false;
      }
      
      return {
        next,
        prev,
      };
    },
  },
  watch: {
    'nextPrev.next': {
      handler(next) {
        if (!next) this.getBeers({
          page: `next`,
        });
      },
    },
  },
  
  // Methods
  methods: {
    getBeers({ page }) {
      if (this.loading) return;
      
      this.loading = true;
      this.page = page === `next` ? this.page + 1 : page;
      
      fetch(`${apiPrefix}beers/?page=${this.page}&per_page=${this.perPage}`)
        .then(res => res.json())
        .then((json = []) => {
          json.forEach(beer => {
            beer.id = `${beer.id}`;
            const id = beer.id;

            this.$set(this.beers, id, beer);
            
            if (!this.saved) this.saved = id;
            else if (!this.current) this.current = id;
          });
        
          setTimeout(() => {
            this.loading = false;
          }, 250);
        });
    },
    showBeer(nextPrev) {
      if ((nextPrev === `next` && !this.nextPrev.next) || (nextPrev === `prev` && !this.nextPrev.prev)) return;
      
      const index = this.nextPrev[nextPrev];
      
      this.current = index;
    },
    setSaved(id) {
      this.saved = id;
    },
  },
  
  // Lifecycle
  mounted() {
    this.getBeers({
      page: 1,
    });
  },
})
              
            
!
999px

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