基础 语法学习

参考博客 

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<template>
    <section class="app-main">
        <transition name="fade-transform" mode="out-in">
            <router-view :key="key" />
        </transition>
    </section>
</template>
<script>
export default {
    name: 'AppMain',
    computed: {
        key() {
            return this.$route.path;
        }
    }
};
</script>