简单写个点击事件 

<template>  <div class="app"><div class="box" @click="fn"></div></div>
</template><script>
export default {//导出当前组件的配置项//里面可以提供 data methods computed watch 生命周期 等methods: {fn () {alert('click')}},name: 'app'
}
</script><style>
.app {width: 400px;height: 400px;background-color: antiquewhite;
}
.app .box{width: 100px;height: 100px;background-color: aquamarine;
}
</style>