This is the default viewer code of BIMData. The modified 0.8.26 version has been used as viewer of ARK-BIM. This release and others JS viewers can be found at unpkg.com
In order to correctly use this code you shoud have an IFC model into BIMData cloud and related tokens and IDs. Then, you can evocate your models by modifing cloudID; projectID; ifcIDs; accessToken
More information: BIMData.io