Detect infinite loops in JavaScript and stop execution

For example, copying and pasting a for loop and editing the variables in order can lead to something like:

```
for (var i = 0; i < 2; i++) {
for (var j = 0; j < 2; i++) {
}
}
```

because the editor is saving changes as you type. This example causes an infinite loop it is hard to break from. Can this be situation detected and/or can some UI element help break from frozen scripts?

Start by reproducing the nested JavaScript loop shown in the issue while editing and determine how script execution becomes unresponsive. No file, test, or entry point is named, so first locate the editor's JavaScript execution path. Done should include a defined way to detect or interrupt the loop and a usable recovery UI.

Written by the indexing model from the issue text.