I need help creating a stateless component with an input element that can be validated by the parent component.
In my code snippet below, I'm facing an issue where the input ref is not being assigned to the parent's private _emailAddress property.
When handleSubmit is triggered, this._emailAddress turns out to be undefined. Am I overlooking something, or is there a more efficient approach to accomplish this?
interface FormTestState {
errors: string;
}
class FormTest extends React.Component<void, FormTestState> {
componentWillMount() {
this.setState({ errors: '' });
}
render(): JSX.Element {
return (
<main role='main' className='about_us'>
<form onSubmit={this._handleSubmit.bind(this)}>
<TextInput
label='email'
inputName='txtInput'
ariaLabel='email'
validation={this.state.errors}
ref={r => this._emailAddress = r}
/>
<button type='submit'>submit</button>
</form>
</main>
);
}
private _emailAddress: HTMLInputElement;
private _handleSubmit(event: Event): void {
event.preventDefault();
// this._emailAddress is undefined
if (!Validators.isEmail(this._emailAddress.value)) {
this.setState({ errors: 'Please enter an email address.' });
} else {
this.setState({ errors: 'All Good.' });
}
}
}
const TextInput = ({ label, inputName, ariaLabel, validation, ref }: { label: string; inputName: string; ariaLabel: string; validation?: string; ref: (ref: HTMLInputElement) => void }) => (
<div>
<label htmlFor='txt_register_first_name'>
{ label }
</label>
<input type='text' id={inputName} name={inputName} className='input ' aria-label={ariaLabel} ref={ref} />
<div className='input_validation'>
<span>{validation}</span>
</div>
</div>
);