2020-08-24 el-date-picker清空后v-model是null

解决方案：利用watch监听v-model

<el-date-picker
          v-model="searchForm.timeRange"
          type="datetimerange"
          value-format="yyyy-MM-dd HH:mm"
          range-separator="~"
          start-placeholder="开场"
          end-placeholder="时间">
 </el-date-picker>

export default {
  data() {
    return {
      searchForm: {
        timeRange: [],
        ...
      },
      ...
    };
  },
  ...
}

watch: {
    'searchForm.timeRange': {
      deep: true,
      handler(newVal) {
        if (!newVal) {
          this.searchForm.timeRange = [];
        }
      },
    },
     ...
}

参考文章:

vue中watch的详细用法