I met the same problem as you. My service-side needed to verify the completeness of the submitted questionnaires and verify the submitted results. How did you solve this problem at that time? I am looking forward to your reply
Re: Any suggestions on how to implement server-side validation of the posted survey?
Answers approved by surveyjs Support
Hello,
You can handle survey completion on the client-side using the survey.onComplete event and post survey data to your server-side storage. Please refer to the following example: Store Survey Results.
If you wish to validate user answers on the server-side, handle the onServerValidateQuestions
event (View Demo), or register a custom expression function which would query a server-side API endpoint and validate a user input (View Demo).
Please let me know if you have any further questions.