From https://espruino.com/ide , when clicking top left connect, then choosing emulator from list, a popup window with url https://www.espruino.com/ide/emu_banglejs.html appears, with white screen.
Is this unexpected?
I have tried many time and its not working here. Very odd!!
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
https://www.espruino.com/ide/emu_banglejs.html won't work - I'm not sure where you found that URL but it's not meant to be loaded on its own.
Best bet just go to https://www.espruino.com/ide/emulator.html (or even /ide and click 'emulator') and it'll work. If it doesn't, try doing a refresh of the page?