Bug 272546 – Incorrect regex replacement for \p{Emoji}

• Component: JavaScriptCore
• Status: RESOLVED CONFIGURATION CHANGED

I found a difference in regex behavior between Safari and Chrome/Firefox.

Copy and paste the following code into devtools:

```js
const s = "🍎".replace(/^[^\p{Emoji}]+|[^\p{Emoji}]+$/u, "")
console.log(s)
for (let i = 0; i < s.length; i++) {
  console.log(s.codePointAt(i))
}
```

Both Chrome and Firefox output the result below:

```
🍎
127822
57166
```

However Safari outputs:

```

55356
```

[Karl Dubost]

Created attachment 470877 [details]
rendering in safari, firefox, chrome

Same results in 
Safari Technology Preview  192           19619.1.8.1
Firefox Nightly            126.0a1       12624.4.11
Google Chrome Canary       125.0.6413.0  6413.0

[Karl Dubost]

ocavue, could you try in STP192?
I can't reproduce this is working for me.

Created attachment 470883 [details]
My macOS and Safari version

Here is my current macOS and Safari version. I will update my STP to the latest version and try again.

Created attachment 470884 [details]
My macOS and Safari version (updated)

I can confirm that this issue doesn't occur anymore in the latest STP Release 192, as shown in my screenshot. So this is a fixed issue. Thanks for your helping and this ticket can be closed now.

[Karl Dubost]

Thanks for replying quickly. <3