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                ### 一、父子組件介紹 ![](https://img.kancloud.cn/71/39/713916e5b65f6eecfd1b09293462376e_672x473.png) ### 二、Vue3.x父組件主動獲取子組件的數據和執行子組件方法 #### 2.1、調用子組件的時候定義一個ref ~~~ <v-header ref="header"></v-header> ~~~ #### 2.2、父組件主動獲取子組件數據 ~~~ this.$refs.header.屬性 ~~~ #### 2.3、父組件主動執行子組件方法 ~~~ this.$refs.header.方法 ~~~ ### 三、子組件主動獲取父組件的數據和執行父組件方法 #### 3.1、子組件主動獲取父組件的數據 ~~~ this.$parent.數據 ~~~ #### 3.3、子組件主動獲取父組件的數據 ~~~ this.$parent.方法 ~~~
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