vue自定义指令elementui日期组件手动输入

html

 <el-form-item label="开始时间" prop="beginTime">
            <!-- :picker-options="pickerOptions" -->
            <el-date-picker
              v-model="formData.beginTime"
              v-elDateFormat
              editable
              value-format="yyyyMMdd"
              type="date"
              placeholder="请选择日期"
              clearable
              style="width: 180px"
            />
</el-form-item>

scipt

  // 自定义指令
  directives: {
    elDateFormat: {
      inserted: function(el, binding, vnode) {
        const { value: _obj } = binding
        const { context: that, data } = vnode
        const { expression: key } = data.model
        if (that && that._isVue) {
          const $this = el.children[0]
          $this.onchange = function() {
            let value = $this.value // 中文日期
            console.log(value)
            if (value.match(/\d{1,}/g) && value.length == 8) {
              value = value.replace(/^(\d{4})\D*(\d{1,2})\D*(\d{1,2})\D*/, '$1-$2-$3') // 格式化输入格式
              const time = value && value.constructor == String ? new Date(value) : value // 转换时间格式
              let keys = key.split('.') // 自定义赋值
              if (_obj) {
                const { keys: keyList } = _obj
                keys = keyList
              }
              if (keys && keys.length >= 2) {
                const [key1, key2, key3, key4] = keys
                if (key4) {
                  that[key1][key2][key3][key4] = time
                } else if (key3) {
                  that[key1][key2][key3] = time
                } else {
                  that[key1][key2] = time
                }
              } else {
                that[key] = time
              }
            }
          }
        }
      }
    }
  },