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<template>
    <div>
        <div>下次加:{{ num}}</div>
        
        <button @click="additionHandle">+加法器</button>
    </div>
</template>
 
<script>
    import {
        EventBus
    } from './EventBus.js'
    console.log(EventBus)
    export default {
        data() {
            return {
                num: 1
            }
        },
        methods: {
            additionHandle() {
                EventBus.$emit('addition', {
                    num: this.num++
                })
            }
        }
    }
</script>