我尝试使用 react-hook-form 来验证输入。但是我发现如果输入放在 Material UI 的对话框组件中,react-hook-form 的setValue没有按预期工作,但是当我删除 Dialog 组件时它可以工作。我猜原因是在组件挂载之前设置了值,但仍然找不到解决方案。 该值将从服务器检索,所以我不能使用 react-hook-form 的defaultValues。
import { useForm } from "react-hook-form"; const App = () => { const { register, setValue } = useForm(); return ( <form> <input {...register("firstName")} /> <button type="button" onClick={() => setValue("firstName", "Bill")}> setValue </button> <button type="butto...
I am trying to get the result as JSON object and setValue to the label while usinguseWatch, but it's not working, if i change to watch as it is working. To Reproduce Steps to reproduce the behavior: Go to 'https://codesandbox.io/s/react-hook-form-set-inputselect-value-21zkn?file=...
fieldState error object error for this specific input. formState isDirty boolean Set to true after the user modifies any of the inputs. Important: Make sure to provide all inputs' defaultValues at the useForm, so hook form can have a single source of truth to compare whether the form is...
调用State Hook 的更新函数时,React 将使用Object.is来比较前后两次 state,如果返回结果为 true,React 将跳过子组件的渲染及 effect 的执行 importReact, { useState }from'react';exportdefaultfunctionCounter() {console.log('render Counter');const[counter, setCounter] =useState({name:'计时器',number:0}...
z.setErrorMap(zodI18nMap);constschema = z.object({name: z.string().min(1),age: z.number().min(10), });exportconstRegister= () => {const{ register, handleSubmit,formState: { errors }, } =useForm({resolver:zodResolver(schema), ...
setCount(prevCount => prevCount + 1); }; return [count, increment]; } 上面的自定义 Hook 名为useCustomHook,它定义了一个count状态变量,以及一个increment函数用于增加count值。在useEffect中监听count的变化,并将count的值显示在页面标题上。
Part 1 函数式组件和 Hook 通常情况下,我们在函数式组件中这样调用 hook: function Example() { const [count, setCount] = useState(0); return ( <div> <p>You clicked {count} times</p> <button onClick={() => setCount(count + 1)}>add</button> </div> ); } 函数式组件本身是个纯函...
使用React Hook可以更简洁、可读性更高地编写组件。 要将数据添加到对象内的数组,可以使用useState Hook来管理对象的状态,并使用数组的push方法将数据添加到数组中。下面是一个示例代码: 代码语言:txt 复制 import React, { useState } from 'react'; const MyComponent = () => { const [myObject, setMy...
这次react放了useState和useEffect两个hook到Glance页。顾名思义,一个是用来存储数据状态的,另一个是控制副作用的。 一个简单的例子:每次都要被拿出来讲的todoList 老的做法: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.