"react": "^16.4.0",本地运行正常,打包之后直接访问,或是部署上线之后,有个页面就会报错TypeError: r.useEffect is not a function。我的代码里没有直接用到useEffect,应该是打包后压缩出来的。感觉是在更新数据的时候报错的,因为页面有三个接口,请求完两个接口后就报错,没有发出第三个请求,但是我怎么也定位不...
问React useEffect引发“create is not a function”错误EN为了解决错误"React Hook 'useEffect' is call...
如果我明确使用 React.useEffect,它也会迫使我将所有其他 useState 和 useEffect 挂钩更改为React.useSate和React.useEffect 下一个错误变为:TypeError: (0 , _react.useState) is not a function在我使用 React 挂钩的另一个文件中。 我想解决问题而不是实施解决方法。 我使用microbundle使用 React 捆绑我的库。我...
// App.js import React, {useEffect, useState} from 'react'; // 👇️ Not a component (lowercase first letter) // not a custom hook (doesn't start with use) function counter() { const [count, setCount] = useState(0); // ⛔️ React Hook "useEffect" is called in function "...
为了解决错误"React Hook 'useEffect' is called in function that is neither a React function component nor a custom React Hook function",可以将函数名的第一个字母大写,或者使用use作为函数名的前缀。比如说,useCounter使其成为一个组件或一个自定义钩子。
// this is not a pure function! export default function person({ id }) { let cnt = 0; return ( <> <p>Nice to meet you! #{id}</p> <p>Change your id to #{id*3}</p> <p>Let's change the count number: {cnt++}</p> </> ) }useEffect在执行什么:一个函数useEffect本身就...
// After another click, our function is called again function Counter() { const count = 2; // Returned by useState() // ... <p>You clicked {count} times</p> // ... } 当我们更新状态的时候,React会重新渲染组件。每一次渲染都能拿到独立的count状态,这个状态值是函数中的一个常量。
Warning: useEffect function must return a cleanup function or nothing. Promises and useEffect(async () => …) are not supported, but you can call an async function inside an effect 这就是为什么不能直接在useEffect中使用async函数,因此,我们可以不直接调用async函数,而是像下面这样: import React, {...
[]ifeffectdoesn'tneedpropsorstate\n\n"+'LearnmoreaboutdatafetchingwithHooks:https://reactjs.org/link/hooks-data-fetching';}else{addendum='Youreturned:'+destroy;}error('%smustnotreturnanythingbesidesafunction,'+'whichisusedforclean-up.%s',hookName,addendum);}}}effect=effect.next;}while(effect...
error('An effect function must not return anything besides a function, ' + 'which is used for clean-up.%s%s', addendum, getStackByFiberInDevAndProd(finishedWork)); } } } effect = effect.next; } while (effect !== firstEffect); ...