# Plugin verifications problem with TypeScriptFileType

**URL:** <https://platform.jetbrains.com/t/plugin-verifications-problem-with-typescriptfiletype/1255>\
**Category:** IntelliJ Platform\
**Created:** [April 7, 2025, 10:28am UTC](https://platform.jetbrains.com/t/plugin-verifications-problem-with-typescriptfiletype/1255 "2025-04-07T10:28:48Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![felix.heitbrock](https://avatars.discourse-cdn.com/v4/letter/f/a9a28c/32.png) [@felix.heitbrock](https://platform.jetbrains.com/u/felix.heitbrock)\
**Post date:** [April 7, 2025, 10:28am UTC](https://platform.jetbrains.com/t/plugin-verifications-problem-with-typescriptfiletype/1255/1 "2025-04-07T10:28:48Z")

</div>

I have a plugin that depends on the `JavaScript` plugin. When setting the `pluginUntilBuild` of my plugin to `252.*` i get compatibility problems against IU-251.23774.200

```auto
#Access to unresolved field com.intellij.lang.javascript.TypeScriptFileType.INSTANCE : LanguageFileType

```

I am currently using the [plugin template](https://github.com/JetBrains/intellij-platform-plugin-template/tree/main). When i change `pluginUntilBuild` to `243.*` i dont not have this issue.

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<div class="post-metadata">

**Author:** ![felix.heitbrock](https://avatars.discourse-cdn.com/v4/letter/f/a9a28c/32.png) [@felix.heitbrock](https://platform.jetbrains.com/u/felix.heitbrock)\
**Post date:** [April 7, 2025, 11:55am UTC](https://platform.jetbrains.com/t/plugin-verifications-problem-with-typescriptfiletype/1255/4 "2025-04-07T11:55:53Z")

</div>

For now i just avoid this issue by using `file.fileType is TypeScriptFileType` instead of a `DefaultFileTypeSpecificInputFilter` and supplying the `TypeScriptFileType.INSTANCE`. Im not sure what the proper way is now to get the instance.

---

<div class="post-metadata">

**Author:** ![victor.turansky](https://sea1.discourse-cdn.com/flex001/user_avatar/platform.jetbrains.com/victor.turansky/32/1072_2.png) [@victor.turansky](https://platform.jetbrains.com/u/victor.turansky)\
**Post date:** [April 7, 2025, 12:05pm UTC](https://platform.jetbrains.com/t/plugin-verifications-problem-with-typescriptfiletype/1255/5 "2025-04-07T12:05:27Z")

</div>

Fine check in Kotlin for platform `251.*` and higher:

```kotlin
file.fileType === TypeScriptFileType

```

`TypeScriptFileType` is Kotlin object since version `251`.