I'm writing a Form component with React and TypeScript. I use Formik for the form logic. I want to pass the <Form />
component a specific form as a prop and render it. Here is what I tried:
import { Formik, FormikProps } from "formik";
import React, { PureComponent, ReactNode } from "react";
export interface Props {
component: ReactNode; // TODO: Change to one of LoginForm or RegisterForm.
handleSubmit(): void;
}
export class Form extends PureComponent<Props> {
renderForm = (formikProps: FormikProps<any>): ReactNode => {
const { component: FormComponent } = this.props;
return <FormComponent {...formikProps} />;
};
render() {
const { handleSubmit } = this.props;
return <Formik render={this.renderForm} />;
}
}
export default Form;
The problem is that the line where I return the <FormComponent />
throws the error:
[ts] JSX element type 'FormComponent' does not have any construct or call signatures.
renderForm
has to return a ReactNode, so I can't change ReactNode
to ComponentType
(the latter would resolve the JSX error).
How would one do this in TypeScript?
Edit So I got it working by doing this (thanks to estus):
import { Formik, FormikProps } from "formik";
import React, { PureComponent, ReactElement } from "react";
export interface Props {
component: React.ComponentType<any>; // TODO: Change to one of LoginForm or RegisterForm.
handleSubmit(): void;
}
export class Form extends PureComponent<Props> {
renderForm = (formikProps: FormikProps<any>): ReactElement<any> => {
const { component: FormComponent } = this.props;
return <FormComponent {...formikProps} />;
};
render() {
const { handleSubmit } = this.props;
return <Formik render={this.renderForm} />;
}
}
export default Form;
ReactNode
is React element type, while component
prop is expected to be React component.
It likely should be:
export interface Props {
component: React.ComponentType;
handleSubmit(): void;
}
renderForm has to return a ReactNode, so I can't change ReactNode to ComponentType (the latter would resolve the JSX error).
component
prop and renderForm
return type aren't connected. The former is a component and the latter is an element.