OpenSpecimen supports the use of skip logic i.e. to shows/hide one or more fields based on the value of another field, in custom forms.
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Condition: Display 'FOBT Results' field when the value for 'FOBT Results' is either one of 'Positive' or 'Negative'
Syntax:
<showWhen><![CDATA[fOBTResults = "Positive" or fOBTResults = "Negative"]]></showWhen>
Example of skip logic to hide/show a subform
Condition: Display the subform "Family History Details" when the value of the field "Family Cancer History" is "Yes"
Syntax (to be added just above the subform control name): <showWhen><![CDATA[familyCancerHistory = "Yes" ]]></showWhen>
When 'Family Cancer History' value is 'No', subform does not appear.
When 'Family Cancer History' value is 'Yes', a subform 'Family History Details' is visible.
