Why is OnChange not working when used in Formik?

Question

I am trying to use Formik in React for a dummy app. I am not being able to type anything in either of the input boxes if I give value as a prop. On the other hand, if I skip the value props, then I can type in the boxes but the same is not reflected as the value while submitting.

Here's the code:

export default class DashboardPage extends React.Component {
    render() {
        return (
                    <Formik
                        initialValues={{ fname: "", lname: "" }}
                        onSubmit={(values) => {
                            alert(values.fname);
                        }}
                        render={({ values, handleChange, handleSubmit }) => (
                            <form onSubmit={handleSubmit}>
                               <input type="text" placeholder="First Name" name="fname" onChange={handleChange} value={values.fname} />
                               <input type="text" placeholder="Last Name" name="lname" onChange={handleChange} value={values.lname} />
                               <button type="submit>ADD<button/>
                            </form>
                        )}
                    />
        );
    }

}

I may be very wrong here and might be over-looking a minor error, but any help/suggestion is appreciated!

Answer 1

export default class DashboardPage extends React.Component {
    render() {
        return (
                    <Formik
                        initialValues={{ fname: "", lname: "" }}
                        onSubmit={ (values) => alert(values.fname) }
                     >
                    { props => (
                      <React.Fragment>                     
                        <form onSubmit={handleSubmit}>
                            <input type="text" placeholder="First Name" name="fname" onChangeText={props.handleChange('fname')} />
                               <input type="text" placeholder="Last Name" name="lname" onChangeText={props.handleChange('lname')} />
                               <button type="submit>ADD<button/>
                            </form>
                        </React.Fragment>
                    )}
                 </Formik>
        )
    }
}

Hi mate can you please try this?

Answer 2

Another possibility for this weird behavior is putting your component inside a function and sending the props as function parameters instead of using a functional component with props as parameters.

When a component is inside a function you lose react component lifecycle and the parameters will not refresh even when its values change.

Make sure your form elements are properly configured as react elements.