form2.jsx

class MyForm extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            input: {
                email: "",
                name: ""
            }
        };
    }
    handleInputChange(newPartialInput) {
        this.setState(state => ({
            ...state,
            input: {
                ...state.input,
                ...newPartialInput
            }
        }))
    }
    render() {
        const {input} = this.state;
        return (
            <form onSubmit={() => /* save your form here */}>
                <div>
                    <input
                        name="email"
                        placeholder="email"
                        value={input.email}
                        onChange={e => this.handleInputChange({email: e.target.value})}
                    />
                </div>
                <div>
                    <input
                        name="name"
                        placeholder="name"
                        value={input.name}
                        onChange={e => this.handleInputChange({name: e.target.value})}
                    />
                </div>
                <div>
                    <button type="submit">Submit</button>
                </div>
            </form>
        );
    }
}