vue toggle做一个点击切换class(实例讲解)

<template>
  <div>
    <span :class="{'bg-primary text-danger':isA,'bg-success text-white':!isA}" @click="toggle()">AAAAA</span>
  </div>
</template>
<script>
  export default {
    name: 'hello',
    data () {
      return {
        isA: false
      }
    },
    methods:{
      toggle:function () {
        this.isA=!this.isA
      }
    }
  }
</script>
<style scoped>
  @import "../../../src/assets/plugin/bootstrap-4.0.0-alpha.6-dist/css/bootstrap.css";
</style>