Javascript 如何在formik中将选择字段添加到FieldArray
我遵循这一准则:Javascript 如何在formik中将选择字段添加到FieldArray,javascript,reactjs,formik,Javascript,Reactjs,Formik,我遵循这一准则: import React from 'react'; import { Formik, Form, Field, FieldArray } from 'formik'; // Here is an example of a form with an editable list. // Next to each input are buttons for insert and remove. // If the list is empty, there is a button
import React from 'react';
import { Formik, Form, Field, FieldArray } from 'formik';
// Here is an example of a form with an editable list.
// Next to each input are buttons for insert and remove.
// If the list is empty, there is a button to add an item.
export const FriendList = () => (
<div>
<h1>Friend List</h1>
<Formik
initialValues={{ friends: ['jared', 'ian', 'brent'] }}
onSubmit={values =>
setTimeout(() => {
alert(JSON.stringify(values, null, 2));
}, 500)
}
render={({ values }) => (
<Form>
<FieldArray
name="friends"
render={arrayHelpers => (
<div>
{values.friends && values.friends.length > 0 ? (
values.friends.map((friend, index) => (
<div key={index}>
<Field name={`friends.${index}`} />
<button
type="button"
onClick={() => arrayHelpers.remove(index)} // remove a friend from the list
>
-
</button>
<button
type="button"
onClick={() => arrayHelpers.insert(index, '')} // insert an empty string at a position
>
+
</button>
</div>
))
) : (
<button type="button" onClick={() => arrayHelpers.push('')}>
{/* show this when user has removed all friends from the list */}
Add a friend
</button>
)}
<div>
<button type="submit">Submit</button>
</div>
</div>
)}
/>
</Form>
)}
/>
</div>
);
致:
红色
绿色
蓝色
当我在一个组件中选择值时,我添加了3个组件,它对所有组件都有影响
我哪里做错了?每个
select
输入的name
属性必须是唯一的。试试下面的方法
<Field component="select" name={`friends.${index}`}>
<option value="red">Red</option>
<option value="green">Green</option>
<option value="blue">Blue</option>
</Field>
红色
绿色
蓝色
<Field component="select" name="color">
<option value="red">Red</option>
<option value="green">Green</option>
<option value="blue">Blue</option>
</Field>
<Field component="select" name={`friends.${index}`}>
<option value="red">Red</option>
<option value="green">Green</option>
<option value="blue">Blue</option>
</Field>