Its job is to spy on the input, report, and set its value. onChange: send data back to hook form onBlur: report input has been interacted (focus and blur) value: set up input initial and updated value ref: allow
const [values, setValues] = useState(initialState); const handleChange = (event) => { setValues({ ...values, [event.target.name]: event.target.value }); }; const resetForm = () => { setValues(initialState); }; return [values, handleChange, resetForm]; } export default useForm;...
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 dirty. Copy const { formState: { isDirty, dirtyFie...
setValue}=useForm();const[color,setColor]=useState({name:"",color_id:-1})useEffect(()=>{get...
问React钩子表单方法- setValue -不起作用EN版权声明：本文内容由互联网用户自发贡献，该文观点仅代表...
return [value, setValue]; } // 使用示例 function ExampleComponent() { const [value, setValue] = useCustomHook('initial'); return <div>{value}</div>; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 2.2 使用格式化函数 ...
React会依次执行hook对象上的整个update queue以获取最新的state,所以useState()返回的tuple[0]始终会是最新的state! 可以看到,在update阶段,initialState根本没有用到的! 2.1.4 useState hook更新过程 function App() { const [n1, setN1] = useState(1); const [n2, setN2] = useState(2); const [n3, ...
setCaptcha(e.target.value); }} /> <button onClick={submit}>提交</button> </div> ); }; export default LoginForm; 这种细粒度的状态,很简单也很直观,但是状态一多的话,要针对每个状态写相同的逻辑,就挺麻烦的,且太过分散。 粗粒度 我们将username、password、capacha定义为一个state就是所谓粗粒度的...
Describe the bug When registering fields manually, the form does not re-render after calling setValue. To Reproduce const MyForm = () => { const { register, unregister, getValues, setValue } = useForm({ defaultValues: { email: '' } }); u...
The canonical array prototype example is a sum function. When we call the reducer on an array that contains only numbers, we can return a single numeric value summing up all values in the array. The reducer can be fed an initial value to start with as an optional second argument. Let's...