有个布尔类型的组件属性modelValue，当给这个属性传递空字符串”“的时候，组件接收的值是true,我跟踪代码发现了这个地方，请问可以给解答一下这里为什么要转换成true吗？谢谢

[slow123top]

[skirtles-code]

Boolean props aim to behave like boolean attributes in HTML.

So, for example, the checked attribute of a native checkbox can be set in various ways:

<input type="checkbox" checked>
<input type="checkbox" checked="">
<input type="checkbox" checked="checked">

Vue handles boolean component props the same way. Imagine we have the prop checked: Boolean, then:

<MyCheckbox checked />
<MyCheckbox checked="" />
<MyCheckbox checked="checked" />

All of these will lead to the checked prop being set to true. The first two will both lead to checked being an empty string.

If you have a prop that can be either a string or a boolean then the order matters. For example, checked: [String, Boolean] would not convert string values to true, whereas checked: [Boolean, String] would.

[slow123top]

Thanks a lot! I got it

[Wei-Ba]

为了兼容dom中只用属性的这种写法 <input disabled>
不想转换直接在Boolean前面加个String就行了

[slow123top]

是的，非常感谢，通过这个问题我也学到了
https://github.com/vuejs/core/issues/13099