vue elment table style modification in accordance with the return value

Today, when writing vue project, check out the data in the database of wanted to change the display according to the conditions. There is a query data 

: Formatter, can achieve this effect, ado, this is my example:

<el-table-column prop="operatetime" label="关联时间" :formatter="timeFormat"></el-table-column>

 

timeFormat is a method

  methods: {
    timeFormat(row, column) {
      const date = new Date(row.operatetime);
      var year = parseInt(date.getFullYear());
      if (year > 2018) {
        return row.operatetime;
      } else {
        return "";
      }
    }

 

Later, the results of which I want to add in some style, I like to write " <span style =" Color: Red "> Time associated </ span>", 
the answer was not enough. Being distressed occasion to see this great God wrote the following address: 
https://blog.csdn.net/qq_35493664/article/details/83832497
 on the perfect solution, Remark about! 
as follows:

  <el-table-column prop="relationemid" label="关联状态">
        <template scope="scope">
          <span v-if="scope.row.relationemid===1" style="color: blue">已关联</span>
          <span v-else>未关联</span>
        </template>
      </el-table-column>