在React和Redux中更改表单输入值的方法如下:
import React, { useState } from 'react';
import { useDispatch } from 'react-redux';
import { updateFormValue } from './actions';
const MyForm = () => {
const [inputValue, setInputValue] = useState('');
const dispatch = useDispatch();
const handleInputChange = (e) => {
setInputValue(e.target.value);
};
const handleSubmit = () => {
dispatch(updateFormValue(inputValue));
};
return (
<div>
<input type="text" value={inputValue} onChange={handleInputChange} />
<button onClick={handleSubmit}>Submit</button>
</div>
);
};
export default MyForm;
// actions.js
export const updateFormValue = (value) => {
return {
type: 'UPDATE_FORM_VALUE',
payload: value,
};
};
// reducer.js
const initialState = {
formValue: '',
};
const reducer = (state = initialState, action) => {
switch (action.type) {
case 'UPDATE_FORM_VALUE':
return {
...state,
formValue: action.payload,
};
default:
return state;
}
};
export default reducer;
// store.js
import { createStore } from 'redux';
import reducer from './reducer';
const store = createStore(reducer);
export default store;
import React from 'react';
import { Provider } from 'react-redux';
import MyForm from './MyForm';
import store from './store';
const App = () => {
return (
<Provider store={store}>
<MyForm />
</Provider>
);
};
export default App;
通过以上步骤,你可以在React和Redux中实现表单输入值的更改。当输入框的值发生变化时,通过dispatch一个action来更新Redux store中的表单值。其他组件可以通过订阅Redux store中的表单值来获取最新的值。这种方式可以实现表单值的统一管理和共享,方便在应用的不同组件中使用。
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