I'm building a form with an auto filling text box using react-select and formik.
<Formik
initialValues={{
assignedTo: task.assignedTo,
}}
onSubmit={(values) => {
const updatedTask = { ...task, ...values };
editTask(updatedTask);
}}
render={({ handleSubmit, handleChange, values }) => (
<form>
<Select type="text" name="assignedTo" options={options} onChange={handleChange} value={{ value: task.assignedTo, label: task.assignedTo }} />
</form>
})
/>
It throws an error Cannot read property 'type' of undefined
How to fix this and handle react-select in formik?
the first parameter of React-Select's onChange is an option value while the first parameter of formik's handleChange is an event
React-Select: onChange(value, action) => void
Formik: handleChange(e: React.ChangeEvent<any>) => void
That is the reason why you received this kind of error.
Here is my approach. I hope this helps you.
import React from 'react';
import { Formik, Form, Field } from 'formik';
import Select from 'react-select';
function SelectField(FieldProps) {
return (
<Select
options={FieldProps.options}
{...FieldProps.field}
onChange={option => FieldProps.form.setFieldValue(FieldProps.field.name, option)}
/>
)
}
export default function FormikReactSelect(props) {
const options = [
{ value: '1', label: 'White' },
{ value: '2', label: 'Yellow' },
];
return (
<Formik>
{formProps => (
<Form>
<Field name='SelectColor' options={options} component={SelectField}/>
</Form>
)}
</Formik>
);
}
As already stated, onChange handler on React-Select is different from the handleChange handler on formik. I arrived at this from the official formik.org documentation...
Notice, I don't spread the field values like so {...field}
into the react-select form because that's the problem we're trying to fix. The field values contain the onChange handler from formik which we intend to remove.
Instead, I only assign the field.name
to the name attribute, and then manually set the value using the setValue
handler provided through the useField helpers. This worked for me.
import { useField, Formik } from 'formik';
import Select from 'react-select';
export default function SelectInput(props) {
const [field, meta, helpers] = useField(props);
const options = [
{ value: '1', label: 'White' },
{ value: '2', label: 'Yellow' },
];
return (
<Formik>
<Select
options={options}
onChange={(option) => helpers.setValue(option?.value)}
name={field.name}
placeholder={props.placeholder}
/>
{meta.touched && meta.error ? <div>{meta.error}</div> : null}
</div>
);
}
I had the same error but found a solution
try this
onChange={e => formik.setFieldValue('language', e[0].value)}
.setFieldValue is a Formik method that needs two arguments, first is the field name which's the value you want to update, and second, is the value
e will be an array with one or multiple selected objects, in my case, there was only one so I accessed the only object using e[0] and then bind the required property from the object, which in my case was e[0].value
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