<div id="app" class="bg-grey-lighter px-8 py-16 min-h-screen">
  <div class="max-w-sm w-full mx-auto">
    <renderless-tags-input v-model="tags">
      <div class="tags-input" slot-scope="{ tags, removeTag, inputAttrs, inputEvents }">
        <span class="tags-input-tag" v-for="tag in tags">
          <span>{{ tag }}</span>
          <button type="button" class="tags-input-remove" @click="removeTag(tag)">&times;</button>
        </span>

        <input class="tags-input-text" placeholder="Add tag..." v-on="inputEvents" v-bind="inputAttrs">
      </div>
    </renderless-tags-input>
  </div>
</div>

.tags-input {
  display: flex;
  flex-wrap: wrap;
  background-color: #fff;
  border-width: 1px;
  border-radius: .25rem;
  padding-left: .5rem;
  padding-right: 1rem;
  padding-top: .5rem;
  padding-bottom: .25rem;
}

.tags-input-tag {
  display: inline-flex;
  line-height: 1;
  align-items: center;
  font-size: .875rem;
  background-color: #bcdefa;
  color: #1c3d5a;
  border-radius: .25rem;
  user-select: none;
  padding: .25rem;
  margin-right: .5rem;
  margin-bottom: .25rem;
}

.tags-input-tag:last-of-type {
  margin-right: 0;
}

.tags-input-remove {
  color: #2779bd;
  font-size: 1.125rem;
  line-height: 1;
}

.tags-input-remove:first-child {
  margin-right: .25rem;
}

.tags-input-remove:last-child {
  margin-left: .25rem;
}

.tags-input-remove:focus {
  outline: 0;
}

.tags-input-text {
  flex: 1;
  outline: 0;
  padding-top: .25rem;
  padding-bottom: .25rem;
  margin-left: .5rem;
  margin-bottom: .25rem;
  min-width: 10rem;
}

.py-16 {
  padding-top: 4rem;
  padding-bottom: 4rem;
}

Vue.component('renderless-tags-input', {
  props: ['value'],
  data() {
    return {
      newTag: '',
    }
  },
  methods: {
    addTag() {
      if (this.newTag.trim().length === 0 || this.value.includes(this.newTag.trim())) {
        return
      }
      this.$emit('input', [...this.value, this.newTag.trim()])
      this.newTag = ''
    },
    removeTag(tag) {
      this.$emit('input', this.value.filter(t => t !== tag))
    }
  },
  render() {
    return this.$scopedSlots.default({
      tags: this.value,
      addTag: this.addTag,
      removeTag: this.removeTag,
      inputAttrs: {
        value: this.newTag,
      },
      inputEvents: {
        input: (e) => { this.newTag = e.target.value },
        keydown: (e) => {
          if (e.keyCode === 13) {
            e.preventDefault()
            this.addTag()
          }
        }
      }
    })
  },
})

new Vue({
  el: '#app',
  data: {
    tags: ['Testing', 'Design']
  }
})