I am using SurveyJS to render questionnaire. I have two elements, one textbox and other dropdown. Until there is value in textbox I want to hide dropdown.
I am trying to use visibleIf to control this behaviour.
eg: I tried below
but none seems to work.
visibleIf: "{question1} != ''"
visibleIf: "{question1} != undefined"
visibleIf: "{question1} != null"
visibleIf: "{question1} != 'undefined'"
visibleIf: "{question1} != 'null'"
Please help.