<div id="app">
    <renderless-tags-input v-model="tags">
        <div slot-scope="{ tags, removeTag, inputAttrs, inputEvents }" class="tags-input">
            <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 v-bind="inputAttrs" v-on="inputEvents" class="tags-input-text" placeholder="Add tag...">
        </div>
    </renderless-tags-input>
</div> 

@import url('https://fonts.googleapis.com/css?family=Lato|Roboto:700');

body {
  margin: 0;
  padding: 0;
  background-color: #777;
  background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAQAAABuBnYAAAAAU0lEQVQIHQXBwRGDIBAAwO2/AMcCDHAcPjIRxjJ8Je1kl1uqUgphsWu6w0sIG6npLpcUBql4e/wsVRKabrkNTacIYbMrwsF06rqUhsnXVKVT+Hj+Ue4rPSONk4kAAAAASUVORK5CYII=);
  width: 100vw;
  height: 100vh;
  display: flex;
  justify-content: center;
  color: #fff;
  font-family: 'Lato', sans-serif;
  line-height: 1.4;
}

#app {
  display: flex;
  justify-content: center;
  align-items: center;
}

.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;
}

// Renderless Tags Input Component
Vue.component('renderless-tags-input', {
  props: ['value'],
  data () {
      return {
          newTag: ''
      }
  },
  methods: {
      removeTag: function (tag) {
          this.$emit('input', this.value.filter(t => t !== tag))
      },
      addTag: function () {
          if (this.newTag.trim().length === 0 || this.value.includes(this.newTag.trim())) {
              return
          }
          this.$emit('input', [...this.value, this.newTag.trim()])
          this.newTag = ''
      }
  },
  render () {
    return this.$scopedSlots.default({
      tags: this.value,
      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()
              }
          }
      },
      addTag: this.addTag
    })
  }
})

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