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React：React合成事件和原生事件 #48

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HCLacids opened this issue Feb 28, 2022 · 1 comment

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HCLacids commented Feb 28, 2022 •

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V17 之前，合成事件和原生事件的执行顺序与冒泡/捕获模式无关，原生事件恒早于合成事件

V17 后，合成事件和原生事件的执行顺序与冒泡/捕获模式相关，冒泡模式，原生事件早于合成事件，捕获模式，合成事件早于原生事件。

HCLacids added the React label

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HCLacids commented Feb 28, 2022

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事件处理函数不是绑定到组件的元素上的，而是绑定到root上，这和fiber树的结构特点有关，即事件处理函数只能作为fiber的prop。
绑定到root上的事件监听不是我们在组件里写的事件处理函数，而是一个持有事件优先级，并能传递事件执行阶段标志的监听器。

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