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                [TOC] ## 概述 如果子組件有一個 focus(),可以通過 ref 觸發 實例 ``` //base-input子組件頁面 <template> <view> <input :focus="isFocus" type="text" placeholder="請輸入內容" /> </view> </template> <script> export default { name:"base-input", data() { return { "isFocus":false }; }, methods:{ focus(){ this.isFocus = true } } } </script> ``` ``` //index 父組件頁面 <template> <view> <base-input ref="usernameInput"></base-input> <button type="default" @click="getFocus">獲取焦點</button> </view> </template> <script> export default { methods:{ getFocus(){ //通過組件定義的ref調用focus方法 this.$refs.usernameInput.focus() } } } </script> ```
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