----TagsInput组件封装----

首先展示一下实现效果：

 直接上代码：

1.html:

 1 <template>
 2   <div class="input tags-wrap">
 3     <div
 4       class="tags"
 5       transition="tags"
 6       :style="{backgroundColor: bgc[item.bgc_no]}"
 7       v-for="(item,index) in dis_source"
 8       :key="index"
 9     >
10       <span class="content">{{item.text}}</span>
11       <span class="del" @click="del(index, false)">&times;</span>
12     </div>
13     <input
14       class="tags-input"
15       type="text"
16       placeholder="标签，按 enter 创建"
17       v-model="text"
18       @keyup.enter="add(text)"
19       @keydown.delete="del(source.length - 1, true)"
20     />
21   </div>
22 </template>

2.js:

<script>
export default {
  props: {
    source: {
      type: Array,
      default: () => {
        return []
      }
    }
  },
  watch: {
    source: {
      handler(newValue) {
        var dis_source = []
        this.source.forEach((item, index) => {
          var obj = {
            text: item,
            bgc_no: Math.ceil(Math.random() * 10) - 1
          }
          dis_source.push(obj)
        })
        this.dis_source = dis_source
      }
    }
  },
  data() {
    return {
      text: '',
      bgc: [
        '#e961b4',
        '#ed664b',
        '#7b6ac7',
        '#56abd1',
        '#f7af4c',
        '#fe5467',
        '#52c7bd',
        '#a479b7',
        '#cb81ce',
        '#5eabc5'
      ],
      dis_source: []
    }
  },
  methods: {
    add(text) {
      if (text !== '') {
        var count = this.source.length
        this.$set(this.source, count, text)
        this.$set(this.dis_source, count, {
          text: text,
          bgc_no: Math.ceil(Math.random() * 10) - 1
        })
        this.text = ''
      }
    },
    del(index, way) {
      if (way) {
        if (index >= 0 && this.text === '') {
          this.source.splice(index, 1)
          this.dis_source.splice(index, 1)
        }
      } else {
        this.source.splice(index, 1)
        this.dis_source.splice(index, 1)
      }
    }
  }
}
</script>

3.css:

<style lang="scss">
//输入框tags
.tags-wrap {
  width: 500px;
  height: 100%;
  outline: none;
  border: 1px solid #dcdfe6;
  border-radius: 4px;
  &::after {
    content: "";
    display: block;
    height: 0;
    clear: both;
  }
}
.tags,
.tags-input {
  position: relative;
  float: left;
  color: #fff;
  line-height: 28px;
  margin: 4px;
  padding: 0 22px 0 10px;
  border-radius: 4px;
  .content {
    line-height: 28px;
  }
  .del {
    width: 22px;
    height: 28px;
    text-align: center;
    cursor: pointer;
    position: absolute;
    top: -1px;
    right: 0;
  }
}
.tags-input {
  font-size: 14px;
  padding: 0;
  background-color: inherit;
  border: none;
  color: inherit;
  width: 10em;
  outline: none;
}
</style>