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Update 03.一文彻底搞懂ReactHooks的原理和实现.md #165

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Update 03.一文彻底搞懂ReactHooks的原理和实现.md #165

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2 changes: 1 addition & 1 deletion docs/ReactJS/03.一文彻底搞懂ReactHooks的原理和实现.md
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Expand Up @@ -170,7 +170,7 @@ function App() {
| unusedNum | 1 |
| num2 | 2 |

当点击事件触发再次渲染，并不会进入条件判断中的 useState。所以，cursor=2 的时候对应的变量是 num2。而其实 num2 对应的 cursor 应该是 3。就会导致`setNum2`并不起作用。
当点击事件触发再次渲染，并不会进入条件判断中的 useState。所以，cursor=2 的时候对应的变量是 num2。而其实 num2 对应的 cursor 应该是 1。就会导致`setNum2`并不起作用。

到此，解决了文章开头提出的「🤔️ 为什么不能在循环、判断内部使用 Hook」。在使用 Hook 的时候，请在函数组件顶部使用！

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