When modal is closing, it changes the visible value automatically

[PegasusZero]

• I have searched the issues of this repository and believe that this is not a duplicate.

Version

1.3.15

Environment

Windows 10 | Chrome 76.0.3809.100 | vue-cli 3.5.1

Reproduction link

Steps to reproduce

1. click "add" button
2. close modal

What is expected?

no [Vue warn] should be shown

'Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "visible"'

[tangjinzhou]

You can not use v-model for prop's value (visible).

[zhenzhenChange]

我也想问这个问题，一般是为了抽离父子组件，父组件里面引用一个模态窗子组件。然后从父组件传递一个 props : visible 给模态窗来控制它的显示/隐藏，但在关闭（通过取消按钮/遮罩层/右上角 x 按钮关闭）的时候，会报 props 单向数据流不可逆改的错误。

我试过在模态窗子组件通过 $emit 或在父组件的 props 加上 .sync 修饰符调用父组件的方法来关闭，也会报这个错。

所以这个 visible 只能在模态窗组件上定义吗？然后在父组件通过 $refs 或者 $children 调用模态窗内部的方法来控制显示/隐藏？

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