<template>
<div>
       <el-tag
          :key="tag"
           v-for="tag in dynamicTags"
           closable
           :disable-transitions="false"
           @close="handleClose(tag)">
           {{tag}}
        </el-tag>
        <el-input
          class="input-new-tag"
          v-if="inputVisible"
          v-model="inputValue"
          ref="saveTagInput"
          size="small"
          @keyup.enter.native="handleInputConfirm"
          @blur="handleInputConfirm"
        />
    <el-button v-else class="button-new-tag" size="small" @click="showInput">+ 新设施</el-button>   
</div>
</template>

<script>
export default {
    name:'DynamicTags',
    props:{
        tags:{
            type:'Array',
            default:() => ([])
        }
    },
    data(){
        return {
            dynamicTags: [],
            inputVisible: false,
            inputValue: ''
        }
    },
    computed:{
        innerTags:{
            get(){
                return this.tags
            },
            set(newVal){
                this.$emit('update:tags',newVal)
            }
        }
    },
    methods:{
        handleClose(tag) {
            this.dynamicTags.splice(this.dynamicTags.indexOf(tag), 1);
        },
        showInput() {
            this.inputVisible = true;
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
            });
        },
        handleInputConfirm() {
            let inputValue = this.inputValue;
            if (inputValue) {
                this.dynamicTags.push(inputValue);
            }
            this.inputVisible = false;
            this.inputValue = '';
        }
    }
}
</script>

<style lang="scss" scoped>
  .el-tag + .el-tag {
    margin-left: 10px;
  }
  .button-new-tag {
    margin-left: 10px;
    height: 32px;
    line-height: 30px;
    padding-top: 0;
    padding-bottom: 0;
  }
  .input-new-tag {
    width: 90px;
    margin-left: 10px;
    vertical-align: bottom;
  }
  
</style>