Metro4-React with Parcel

[mjbedford]

Hi I am trying to use Parcel with Metro4-React and I get the following build error when I try and import any Metro4-React component

@parcel/transformer-js: Expected ',', got 'className'

/Users/mbedford@tibco.com/projects/OP2/node_modules/metro4-react/src/components/accordion/accordion.jsx:21:18
20 | return (

21 | <div className={'frame ' + (open ? 'active' : '') + ' ' + clsFrame}>
| ^^^^^^^^^
22 | <div className={'heading ' + clsFrameHeading} onClick={this.onHeadingClick}>{title}
23 |

Is it possible to use Parcel with Metro4-React?
Is there any specific configuration I need to add to either Parcel or elswhere