wxml:

  <view class='weui-font'>
        <block wx:for="{{item.title}}" wx:key="*this"  wx:for-item="items">
            <text wx:if="{{items.key == true}}" style="color:red;">{{items.str}}</text>               
            <text wx:else>{{items.str}}</text>
         </block>     
  </view>
 

js

 value = '環網櫃';
 var data = JSON.parse(res.Content).rows;   
      
  // 將標題已關鍵字拆開成陣列    
  for (let i = 0; i < data.length; i++) {
     data[i].title = that.hilight_word(value, data[i].title);
  }           

// 根據搜尋字分割字元
  hilight_word: function (key, word) {    
    let idx = word.indexOf(key), t = [];

    if (idx > -1) {
      if (idx == 0) {
        t =this.hilight_word(key, word.substr(key.length));
        t.unshift({ key: true, str: key });
        return t;
      }

      if (idx > 0) {
        t =this.hilight_word(key, word.substr(idx));
        t.unshift({ key: false, str: word.substring(0, idx) });
        return t;
      }
    }
    return [{ key: false, str: word }];
  }
 

效果如下