在子組件直接修改父組件的報錯信息：vue.js:597 [Vue warn]: Avoid mutating a prop directly since the value will be ov...
在vue中子組件是不允許直接修改父組件傳過來的數據，因爲如果父組件傳過來的數據如果是數組或者是對象的數據的話，在 子組件中直接修改傳過來數據的話，會影響到其他組件的數據，所以要在子組件data數據裏定義一個變量來保存父組件傳過來的 數據。 但是這樣的話，定義的局部變量ttt只能接受conten的初始值，當父組件要傳遞的值發生變化時，ttt就無法接收到最新的值了 我們可以定一個計算屬性，watc
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