StopJavaScript

This project doesn't aim to kill JavaScript (well, hold on 🤔) but tries to stop the execution of some JS code running in a JSContext. Situation:

• You have some JS code you want to run.
• That code takes a significant amount of time to run.
• The user can cancel the operation at any time.
• When they do, you want to stop the execution of the JS code no matter what.

How to run this

This project is targetting iOS 13.1. Just open & run it. The different attemps I'm trying are in ViewController.swift.

Wait, but does this work or not?

~It does not.~

It does now. After some experimentation, it turns out that if you have a WKWebView evaluating certain JS code, you can terminate that execution by nil'ing the WKWebView object. See WKWebViewJSCore for more details.