Extension causes weird random source-code to appear.

[theMomax]

If I have this extension enabled, some random javascript code appears on top of the editor when I select specific words. E.g. the "to" in the image below.

[psixdev]

I confirm, I suffered for a long time from this problem. Now he finally decided to figure out the extension by turning off everyone in turn.

The code appears when I highlight the words "map", "filter". It disappears when I highlight "false", numeric values.

[PaulBurridge]

Using developer tools discovered the element responsible:

[PaulBurridge]

Doe a little digging, the onSelection function calls math.eval(editor.document.getText(editor.selection) for certain strings (e.g. "eval", "map") it returns a function which is then converted into a string resulting in function code on screen.

https://mathjs.org/ has a notepad that does live eval which it converts to just the word "function" I would suggest adding logic to do the same.