How to set timezone for web engine's javascript engine?

[Vinnie]

Current behavior

• Create a QWebEngineView
• Visit https://codepen.io/pen/, open the console at the lower left corner
• Run Date()

This would show the local system's local time and timezone.

Question

How can I tell QWebEngineView to use a different timezone when executing javascript in the browser, instead of using the system timezone?

[JonB]

@Vinnie
So this is a generic question about JavaScript rather than anything to do specifically with QWebEngine (Chromium). JS allows you to read the current timezone (of the browser) but not set it. You have to do the manipulations in code yourself on a Date object to "emulate" a different tz. Have a read of, e.g. https://stackoverflow.com/questions/15141762/how-to-initialize-a-javascript-date-to-a-particular-time-zone.