我有一个名为Context.js的文件,其中有一个reducer。所有这些都使用Context API传递给其他组件
const reducer = (state, action) => {
switch (action.type) {
case "SET_NAME":
return {...state, name: action.payload}
case "SET_LASTNAME":
return {...state, lastname: action.payload}
case "SET_EMAIL":
return {...state, email: action.payload}
default:
return state
}
在许多其他组件中,我试图使用Formik处理表单,并希望将表单信息保存为状态,以便通过其他组件访问表单时,可以提供已经提供的信息。找到那里。
<label htmlFor="name">Nome</label>
<Field maxLength="51"
name="name"
value={name}
type="text"
onChange={(e) => dispatch({ type: "SET_NAME", payload: e.target.value })}
/>
<ErrorMessage name="name" />
如果我尝试登录“名称”,它就可以正常工作,但是当我离开该字段时,它会给我错误消息,好像没有键入任何内容。
我似乎无法弄清楚如何将Formik与useReducer一起使用或如何将其信息传递给其他组件
答案 0 :(得分:0)
Formik处理状态中的表单,因此您可能必须像这样实现表单,以帮助您将输入数据发送到redux reducer:我希望这个示例有所帮助
import React from "react";
import { Formik } from "formik";
import { useDispatch } from 'react-redux';
const MyForm = () => {
const dispatch = useDispatch();
return (
<Formik
initialValues={{ email: "" }}
onSubmit={async values => {
await new Promise(resolve => setTimeout(resolve, 500));
alert(JSON.stringify(values, null, 2));
}}
>
{props => {
const {
values,
touched,
errors,
dirty,
isSubmitting,
handleChange,
handleBlur,
handleSubmit,
handleReset
} = props;
return (
<form onSubmit={handleSubmit}>
<label htmlFor="email" style={{ display: "block" }}>
Email
</label>
<input
id="email"
placeholder="Enter your email"
type="text"
value={values.email}
onChange={(e) => {
console.log(e.target.value);
// send input data to formik
handleChange(e);
// dispatch to reducer
dispatch({ type: "SET_NAME", payload: e.target.value });
}}
onBlur={handleBlur}
className={
errors.email && touched.email
? "text-input error"
: "text-input"
}
/>
{errors.email && touched.email && (
<div className="input-feedback">{errors.email}</div>
)}
<button
type="button"
className="outline"
onClick={handleReset}
disabled={!dirty || isSubmitting}
>
Reset
</button>
<button type="submit" disabled={isSubmitting}>
Submit
</button>
<pre
style={{
background: '#f6f8fa',
fontSize: '.65rem',
padding: '.5rem',
}}
>
<strong>props</strong> ={' '}
{JSON.stringify(formik.values, null, 2)}
</pre>
</form>
);
}}
</Formik>
)
};
export default MyForm;