// 筛选变色
brightenKeyword(val, keyword) {
  val = val + '';
  if (val.indexOf(keyword) !== -1 && keyword !== '') {
    return val.replace(keyword, '<font color="#409EFF">' + keyword + '</font>')
  } else {
   return val
  }
}
// 或者用正则表达式
brightenKeyword(val, keyword) {
  const Reg = new RegExp(keyword, 'i');
  if (val) {
    return val.replace(Reg, `<span style="color: #409EFF;">${keyword}</span>`);
  }
}
// 使用方法
<el-table-column label="维护内容">
  <template slot-scope="scope">
   <span v-html="brightenKeyword(scope.row.strContent, filters.strContent)" ></span>
  </template>
</el-table-column>