The user will see the option to perform the checkout depending on whether they are signed in and whether the checkout has already been opened.
mern-marketplace/client/cart/CartItems.js:
{!this.props.checkout && (auth.isAuthenticated() ? <Button onClick={this.openCheckout}> Checkout </Button> : <Link to="/signin"> <Button>Sign in to checkout</Button> </Link>)}
When the checkout button is clicked, the openCheckout method will use the setCheckout method passed as a prop to set the checkout value to true in the Cart component:
openCheckout = () => { this.props.setCheckout(true)}
Once the checkout value is set to true in the Cart view, the Checkout component will be rendered to allow the user to enter the checkout details ...
