vue中点击按钮添加样式

此文章只是用于记录

1、遍历的元素在点击时添加样式
html

<div class="midadd">
  <template v-for="(item, index) in knowTypelist">
    <div
      class="mid"
      :key="item.id"
      @click="change(index)"
      :class="{ active: index == number, activ: index != number }"
    >
      <div class="right" @click="showPopup(item.id,index)">
        <p class="projectlist">{{ item.name }}</p>
      </div>
    </div>
  </template>
</div>

js

data() {
    return {
      number: 0,
      knowTypelist:[],
    };
  },
methods：{
 change: function (index) {
     this.number = index; //重要处
  },
}

css

.active {
  color: #ffffff;
  background: #4cc2a8;
}
.activ {
  color: #000;
  background: #fff;
}
.midadd {
  width: 100%;
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  margin-top: 0.1rem;
  .mid {
    width: 32.7%;
    border: 0.01rem solid #f7f7f7;
    text-align: center;
    line-height: 1rem;
  }
}

2、静态

在这里插入代码片

2、静态数据 点击不改变
html

<div class="top">
     <div
       class="cantent"
       @click="(money = 0.01), (month = 1)"
       :class="money == 0.01 ? 'active' : ''"
     >
       <p>1个月</p>
       <p>0.01&nbsp;元</p>
     </div>
     <div
       class="cantent"
       @click="(money = 0.02), (month = 3)"
       :class="money == 0.02 ? 'active' : ''"
     >
       <p>3个月</p>
       <p>0.02&nbsp;元</p>
     </div>
   </div>

js

data() {
    return {
      month: 1,
      money: 0.01,
    };
  },

css

.cantent {
  width: 80%;
  height: 40px;
  display: flex;
  justify-content: space-between;
  flex-direction: row;
  margin: 0 auto;
  line-height: 40px;
  font-size: 14px;
  margin-bottom: 20px;
  border: 1px solid #bbbbbb;
  padding: 0 10px;
}
.active {
  background-color: #77a9fd;
  color: white;
}

3、静态数据 点击改变
html

div class="button" >
   <div class="teaching" @click="onteaching" :class="onclass1==true ? 'active' : ''">教学区</div>
   <div class="life" @click="onlife" :class="onclass2 == true ? 'active' : ''">生活区</div>    
</div>

js

  data() {
    return {
      onclass1:true,
      onclass2:false,
    };
  },
  methods: {
   onteaching(){
     this.onclass1=true;
     this.onclass2=false;
   },
   onlife(){
     this.onclass2=true;
     this.onclass1=false;	   
   },
  }

css

.button{
  width: 90%;
  height: .8rem;
  margin: 0 auto;
  line-height: .8rem;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  background: #fff;
  div{
    width: 50%;
    text-align: center;
    border: .01rem solid #f7f7f7;
  }
}
.active {
  background-color: #77a9fd;
  color: white;
}

最后

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