@vueuse/core 核心功能

 <template>

    
   <div class="container">
    
     <div>{{ x }}-{{ y }}</div>
    
     <div>{{ store }}</div>
    
     <div>
    
       <button @click="addNum">add-{{ counter }}</button>
    
     </div>
    
     <div>
    
       <button @click="fullScreen">全屏</button>
    
     </div>
    
     <div>
    
       <button @click="copyContent">点击复制</button>
    
     </div>
    
     <div :class="mode">
    
       <button @click="btn">切换主题色</butt