This web tool was installed in a older code base (not our legacy code), the task was to create a calculator that worked out rental yield, the calculations were straight forward enough but creating a library javascript file that encompassed not only the calculation task but also have a validation object that could be easily extended or isolated for future  projects involving the validation object.

Using our favoured modulas javascript pattern this useful web tool would be easily portable across to a new platform as the client is currently planning to do so. This Rental Yield calculator is one of a few caclulators we have created in recent weeks.