ResizeObserver is a JavaScript web API that allows you to run code whenever an element’s size changes.


Many Sky-Watcher telescopes come with a decent quality 8x50 finder scope. I converted my scope into a guide scope for use with a ZWO ASI 120mm Mini.

Sahir Vellani

Software Engineer @ Microsoft | Web Platform | Amateur Astrophotographer

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store