Get step content with state

partial_checkout3.js

getStepContent = (step) => {
		switch (step) {
			case 0:
				return <AddressForm
					state={this.state}
					handleChange={this.handleChange}
				/>;
			case 1:
				return <PaymentForm state={this.state}
					handleChange={this.handleChange}
				/>;
			case 2:
				return <Review state={this.state}
					handleChange={this.handleChange}
				/>;
			default:
				throw new Error('Unknown step');
		}
	}