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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
USE OF JWT BACKEND SERVER For using JWT token on the backend server you need to install firebase-admin to your backend server. After installing firebase admin, you need to import firebase-admin and initialize the firebase app. To initial it you need a private key from your firebase project. To generate a private key file for your service account: In the Firebase console, open Settings > Service Accounts > Click Generate New Private Key, then confirm by clicking Generate Key > Securely store the JSON file containing the key. Check this to initial firebase app to backend end server After initialization, you will get that token from Headers authorization. After getting that token from the header token you have to check that token and you have to decode it as an object. After decoding your token, you will get logged on user information as an object. you can verify users using middleware on your backend server. Check below to decode the JWT token.
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