Offline version of Desmos Graphing Calculator calling load and save APIs
The following APIs are called to save and load json files. https://www.desmos.com/api/v1.4/docs/index.html#document-saving-and-loading
The calculator.js is an old version (1.4). To update it to the newest version Desmos provides, please refer to the official site:
https://www.desmos.com/api/
Save from the online version of Desmos (www.desmos.com/calculator)
Copy the scripts in save_state.js and paste in the browser's console.
Tested on Chrome 79.0.3945.130 hosted on Windows 10 1903.