Negative lookbehind not working in watched words regex

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1

It seems negative lookbehind expressions (which should be valid in both Ruby and JS flavors of regex, the latter as of ECMAScript 2018) don’t work in Watched Words.

Here’s an example:

(?<!new\s)\bcar\b should match instances of car that are not preceded by new.

E.g. it should match car in this sentence:

He drives a car

But not in this sentence:

He drives a new car

However, it returns the following error when adding under Watched Words:

Regex error
Regex error950×96 6.28 KB

Is this not supported on purpose or is it a bug? Or does it need to be written in a different way?

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2

Welcome, Thomas :slight_smile:

I don’t encounter this issue:

image

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3

Does it also work for you for automatic linking?

4

It seems, yes.

Screenshot_20230718_193943_Chrome
Screenshot_20230718_193943_Chrome1080×2340 166 KB

Screenshot_20230718_194053_Chrome
Screenshot_20230718_194053_Chrome1080×2340 159 KB

5

Strange that it’s not working for me then. I’m currently on 3.1.0.beta4, will upgrade to the latest and try again…

6

Interestingly, it seems to be browser-dependent. I get the error in Safari, but not in Chrome. When adding it in Chrome and viewing the list in Safari the error shows up there.

But I guess I can just ignore it for now.

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7

I tried it on Chrome (Windows) and Safari 16.5.2 and I still couldn’t reproduce your issue. :thinking:

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8

Turns out it’s only supported from Safari 16.4, and I had 16.3.

Still causing other issues for me, though (like can’t save my user preferences):

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