Vue练习四：01_04_点击将DIV变成红色

<template>
  <div id="app">
    <button @click="handleColor">点击将DIV变成红色</button>
    <div class="outer">
      <div v-for="n in 3" :key="n"
      :style="{background:activeColor}"
      ></div>
    </div>
  </div>
</template>
<script>
export default {
  data:function(){
    return{
      activeColor:‘black‘
    }
  },
  methods:{
    handleColor(){
      this.activeColor=‘red‘;
    }
  }
}
</script>