Is this lib basically doing /\p{Emoji}|\p{Default_Ignorable_Code_Point}/gu ?

[caub]

That regex /\p{Emoji}|\p{Default_Ignorable_Code_Point}/ would detect all emojis and join controls

[mathiasbynens]

Is this lib basically doing /\p{Emoji}|\p{Default_Ignorable_Code_Point}/gu?

No.

\p{Emoji} only matches emoji consisting of a single code point. The vast majority of emoji consist of multiple code points.

We use https://github.com/mathiasbynens/emoji-test-regex-pattern.

[caub]

In my usecase, I just need to remove them, so I can do

'️🤷‍♂️'.replace(/\p{Emoji}|\p{Default_Ignorable_Code_Point}/gu, '').length
0

and that works for multi code points emojis is this right?

but .match(/\p{Emoji}|\p{Default_Ignorable_Code_Point}/gu) return multiple characters instead of one, is this what you mean?

[mathiasbynens]

It might work for some of them, but certainly not for all. Testing it against the full list in https://github.com/mathiasbynens/emoji-test-regex-pattern/blob/main/dist/latest/index-strings.txt, there are several failures.

// Note: `string` is the contents of the text file I pointed to.
string.replace(/\p{Emoji}|\p{Default_Ignorable_Code_Point}/gu, '').replaceAll('\n', '').length;
// -> 84
[...string.replace(/\p{Emoji}|\p{Default_Ignorable_Code_Point}/gu, '').replaceAll('\n', '')].length;
// -> 54