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I’ve used forminator to create a ‘mortgage calculator’ on our website.
One of the fields in the form is ‘Loan-to-value’, which is a calcution field.
I need a way to stop users being able to proceed with the form if this field shows a certain value.
Specifically, if the ‘loan-to-value’ is >95%, I want to show an error message and stop users from being able to submit the form until they’ve changed it.