How does vue add different styles according to the property values of array objects?

add the code first, such as the title. Add different background colors to p according to its content. I"ve been doing it for a long time, but I don"t know how to do it. 

<table cellSpacing=0 cellPadding=0 id="right_table2" class="table table-bordered">
              <tr v-for="item in data4" >
                <td>
{{item.gonghangId}}
</td>
                <td>
{{item.jianhangId}}
</td>
                <td>
{{item.nonghangId}}
</td>
                <td>
{{item.zhonghangId}}
</td>
                <td>
{{item.zhaoshangId}}
</td>
                <td>
{{item.jiaohangId}}
</td>
                <td>
{{item.pufaId}}
</td>
                <td>
{{item.guangdaId2}}
</td>
                <td>
{{item.guangdaId}}
</td>
              </tr>
            </table>
data4: [
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
          {regions: "", gonghangId: "", jianhangId: "", nonghangId: "", zhonghangId: "", zhaoshangId: "", shuangyouId:""},
        ]

clipboard.png

Vue.js
Mar.28,2021

dynamic binding class ide/class-and-style.html" rel=" nofollow noreferrer "> https://cn.vuejs.org/v2/guide.

if it is not given a color in the background, then there must be a standard for certain colors. If there is a standard, can we use v-if to judge

if the returned data is fixed, you can use configuration to write a data storage color 

var colors = {
    '':'-sharp333',
    '':'-sharp444',
    //... 
},
keys = ['gonghangId','jianhangId','nonghangId','zhonghangId','zhaoshangId','jiaohangId','pufaId','guangdaId2','guangdaId']


<tr v-for="item in data4" >
    <td v-for="(key,i) in keys" :key='i'><p :style={backgroundColor:colors[item[key]] || 'none'}>{{item[key]}}
</td>
</tr>

I wrote it myself. Although it was very redundant, I still posted it. Through comparison, I got a lot of ~

. 
<tr v-for="item in data4" style="background-color: antiquewhite" >
    <td :class=color(item.gonghangId)><p >{{item.gonghangId}}
</td>
    <td :class=color(item.jianhangId)><p >{{item.jianhangId}}
</td>
    <td :class=color(item.nonghangId)>
{{item.nonghangId}}
</td>
    <td :class=color(item.zhonghangId)>
{{item.zhonghangId}}
</td>
    <td :class=color(item.zhaoshangId)>
{{item.zhaoshangId}}
</td>
    <td :class=color(item.shuangyouId)>
{{item.shuangyouId}}
</td>
    <td :class=color(item.jiaohangId)>
{{item.jiaohangId}}
</td>
    <td :class=color(item.pufaId)>
{{item.pufaId}}
</td>
    <td :class=color(item.guangdaId2)>
{{item.guangdaId2}}
</td>
    <td :class=color(item.guangdaId)>
{{item.guangdaId}}
</td>
  </tr>
      color:function (val) {
        if(val==""){
          return 'test_color';
        }else if(val==''){
          return 'tfl_color'
        }else if(val==''){
          return 'xylz_color'
        }else if(val==''){
          return 'bzr_color'
        }else if(val==''){
          return 'bhz_color'
        }else if(val==''){
          return 'ycd_color'
        }else {
        }
      }

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e443cc-43fe0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e443cc-43fe0.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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