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HTML 

              
                <div id="app">
  <div id="top" :style="bgc">
    <div class="labels">
      <div style="width: 80%;">Type in a phrase</div>
      <div class="score">Score</div>
    </div>
    <div class="interactive">
      <textarea v-model="phrase"></textarea>
      <p class="score">{{analysis.comparative}}</p>
    </div>
  </div>
  <div id="middle">
    <template v-for="emoji in emojis">
      <div class="emoji" 
           v-bind:style="{ backgroundColor: getBgc(emoji)}">
        {{emoji}}
      </div>
    </template>
  </div>
  <div id="positive" class="word-list">
    <div class="list-head">Positive Words</div>
    <ul>
      <li v-for="word in analysis.positive">
        {{word}}
      </li>
    </ul>
  </div>
  <div id="negative" class="word-list">
    <div class="list-head">Negative Words</div>
    <ul>
      <li v-for="word in analysis.negative">
        {{word}}
      </li>
    </ul>
  </div>
  <div id="footer" :style="bgc">
    Score is based on (weighted) sum of positive words and negative words, divided by number of words
  </div>
</div>
!

CSS 

              
                @import url("https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700");

body {
  font-family: "Open Sans", sans-serif;
}

#app {
  display: grid;
  grid-template-rows: 40vh 1fr 30vh 1fr;
  grid-template-columns: repeat(8, 1fr);
}

#top {
  grid-column: 1/9;
  grid-row: 1/2;
  font-size: 2em;
  display: flex;
  flex-direction: column;
/*   justify-content: center; */
  padding: 1em 2em;
}

textarea {
  resize: none;
  font-size: 1em;
  padding-bottom: 5px;
  text-align: left;
  outline: none;
  width: 80%;
  background-color: transparent;
  border-color: transparent;
  border-bottom: black solid 1px;
}

.labels {
  display: flex;
  justify-content: flex-start;
  font-size: 16px;
  text-align: left;
  margin-bottom: 10px;;
}

.interactive {
  display: flex;
}

.score {
  width: 20%;
  margin-left: 0 10px;
  text-align: left;
}

#middle {
  grid-column: 1/9;
  grid-row: 2/3;
  display: flex;
  justify-content: space-evenly;
  align-content: center;
  font-size: 3em;
}

.emoji {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  padding: 1em 0;
}

.word-list {
  color: white;
  overflow-y: scroll;
  padding-top: 1em;
  padding-left: 1em;
}

#positive {
  grid-column: 1/5;
  grid-row: 3/4;
  background-color: #1a237e;
}

#negative {
  grid-column: 5/9;
  grid-row: 3/4;
  background-color: #b71c1c;
}

.list-head {
  font-size: 1.3em;
  padding-bottom: 10px;
  text-decoration: bold;
}

li {
  padding: 5px 0 5px 10px;
}

#footer {
  grid-column: 1/9;
  grid-row: 4/5;
  text-align: center;
  padding: 1em;
}
!

JS 

              
                // we've imported the @trainorpj/sentiment library
const { scaleThreshold, scaleOrdinal } = d3;

const analyze = phrase => {
  const val = sentiment(phrase);
  return {
    comparative: val.comparative,
    negative: val.negative,
    positive: val.positive
  };
};

const emojis = ["😍", "🙂", "😑", "🙁", "😠"];
const colors = ["#2979FF", "#81D4FA", "#EDE7F6", "#F48FB1", "#E53935"];

const emojiColor = scaleOrdinal()
  .domain(emojis)
  .range(colors);

const emojiSentiment = scaleThreshold()
  .domain([-3, -1, 1, 3, 5])
  .range([...emojis].reverse());

var app = new Vue({
  el: "#app",
  data() {
    return {
      emojis,
      phrase: `I love waffles 😁....
but hate pancakes 💩`
    };
  },
  computed: {
    analysis: function() {
      const { comparative, positive, negative } = sentiment(this.phrase);
      return {
        comparative: comparative.toFixed(2),
        positive,
        negative
      };
    },
    bgc: function() {
      const emoji = emojiSentiment(this.analysis.comparative);
      const color = emojiColor(emoji);
      return { backgroundColor: color }
    }
  },
  methods: {
    changeBgc(val) {
      const emoji = emojiSentiment(val);
      const color = emojiColor(emoji);
      this.bgc.backgroundColor = color;
    },
    getBgc(emj) {
      return emojiColor(emj);
    }
  }
});
!
999px

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