Bug when pasting emojis into IntelliJ

[JamyGolden]

Problem

There is an issue where IntelliJ Biome formats emojis when they are pasted into the document.

1. Have Biome installed and Run format on save enabled.
2. Paste in ✈️ (unicode value: U+2708 U+FE0F) into the document

It formats that emoji to ✈ (unicode value: U+2708) when pasting in it - not even on save. Biome cli itself doesn't do this formatting, so it's definitely an IntelliJ Biome issue. When Run format on save is not enabled, I don't get the error.

Expectation

When pasting the emoji into the document, it doesn't format away the U+FE0F emoji bit of the unicode character, like IntelliJ behaves without Biome IntelliJ Run format on save option enabled.

System information

Operating System: PopOs 22.04 and MacOS Sonoma
App: IntellJ IDEA Ultimate 2024.2.0.1
Biome IntelliJ version: 1.2.1 and also tried 1.0.0

[nhedger]

Can you confirm this happens even if the biome extension is disabled?

[JamyGolden]

If the Biome extension is disabled, the expected functionality happens: Pasting the emoji (unicode value: U+2708 U+FE0F) is correctly pasted as is into the file and the U+FE0F part is not stripped away.

A colleague of mine actually ran into this issue and I was able to recreate it so I know this at least happens on different operating systems and different machines.

[henrik242]

Just popping by to say I can still reproduce this on Biome 1.4.0 in Intellij IDEA 2024.2.1

[cstuncsik]

It happens to me as well, Biome 1.4.0 in Intellij IDEA 2024.2.1 on MacOS Sonoma 14.7

Pasting this emoji (⚠️) into my translation json file works but when I save the file it gets replaced to ! but the others are untouched

{
  "warning": "⚠️ Warning",
  "welcome": "👋 Welcome {name}!",
  "askAi": "✨ Ask AI",
  "seeThis": "👈 This is {node}’s AI Logs"
}

It works at the playground though

Maybe it's an IntelliJ problem not Biome

[henrik242]

More detailed steps to reproduce:

1. Use Biome plugin 1.4.0 in IntelliJ IDEA 2024.2.3 (using Biome 1.9.1) with Format on Save enabled

2. Open this file: test1.json

3. Make a small change and save it

4. The emoji will have changed like this: test2.json