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vkboo avatar vkboo commented on April 19, 2024 1

受控组件于非受控组件是针对表单元素来讲的，React是MVVM的库，数据(Model)的更新会通过ViewModel反映到视图(View)上，然而视图的更新并不会自动的映射到数据中，按照库默认的处理方式，则所有的表单就控件都是非受控组件，如果手动指定了表单元素的onChange事件，在事件函数中手动给相应的数据进行赋值，且这个值在绑定在表单的value/checked属性上，则这个表单元素就是受控组件。
简单的说受控于非受控的区别就是数据于视图之间是否互相绑定。按照React的**来说，一般我们在进行表单处理的时候都需要把组件处理成受控的，这样在做复杂的表单校验、提交数据的获取都会方便很多.

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