How does Mini Program set variable names dynamically?

JS

data: {
    isInFront: true
}

...

 flipCard: function(){
    this.setData({
      isInFront: !this.data.isInFront
    })
 }

WXSS

.container-body-box-item{
  width: 200px;
  height: 200px;
  transform:perspective(800px) rotateY(0deg);
  transition:1s;
  transform-style:preserve-3d;
}
.container-body-box-item.show-back{
  transform:perspective(800px) rotateY(-180deg);
}
.front, .back{
  width: 100%;
  height: 100%;
  left:0;
  top: 0;
  color: -sharpfff;
}
.front{
  background: pink;
  position: absolute;
  transform:translateZ(1px);
}
.back{
  background: yellowgreen;
  transform:translateZ(-1px) rotateY(180deg);
}

WXML

 <block wx:for="{{list}}" wx:key="{{index}}">
   <view class="container-body-box-item {{isInFront?"":"show-back"}}" bindtap="flipCard">
    <view class="front">
      <view></view>
    </view>
    <view class="back">
      <view></view>
    </view>
  </view>
 </block> 

the block container-body-box-item is looped out to control the flip effect alone. The problem I encountered is that I don"t know how to control it alone. After studying it for a long time, Mini Program seems to be unable to splice the variable name. How can I identify which block I clicked on and let him flip it?

Jun.27,2021

the first method:

  1. is the element of the list array an object? if not, it is recommended to change the object isInFront as a key, of the object so that you can control the specified element
  2. .
  3. Code:

      <view></view>
    </view>
  </view>
 </block> 

the second method:

  1. prepare an empty array, and each click on a card will store the subscript of that card in the array
  2. write a wxs to determine whether an item already exists in the array
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