# NR v5.0.9 - Editor Monaco error adding extra typescript definitions

**URL:** <https://discourse.nodered.org/t/nr-v5-0-9-editor-monaco-error-adding-extra-typescript-definitions/102032>\
**Category:** Developing Nodes\
**Tags:** monaco, uibuilder\
**Created:** [31 October 2026 14:57 UTC](https://discourse.nodered.org/t/nr-v5-0-9-editor-monaco-error-adding-extra-typescript-definitions/102032 "2026-10-31T14:57:23Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [31 October 2026 14:57 UTC](https://discourse.nodered.org/t/nr-v5-0-9-editor-monaco-error-adding-extra-typescript-definitions/102032/1 "2026-10-31T14:57:23Z")

</div>

This was working until recently, don't think it is something I've done?

The following used to work to add some extra definitions to the function node:

```js
window.monaco.languages.typescript.javascriptDefaults.addExtraLib(
    typeDeclarations,
    'file://types/uibuilder/uib-util.d.ts'
)

```

But as of v5.0.9, it no longer works.

It now looks as though it has moved to:

```auto
window.monaco.typescript.javascriptDefaults.addExtraLib

```

Can someone confirm if this is correct please?

If it is correct, it is really a Node-RED breaking change isn't it? At the very least, doing this now requires additional checks for the correct location.

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<div class="post-metadata">

**Author:** ![Rei\_Kurosawa](https://avatars.discourse-cdn.com/v4/letter/r/e5b9ba/32.png) [@Rei\_Kurosawa](https://discourse.nodered.org/u/Rei_Kurosawa)\
**Post date:** [31 October 2026 15:41 UTC](https://discourse.nodered.org/t/nr-v5-0-9-editor-monaco-error-adding-extra-typescript-definitions/102032/2 "2026-10-31T15:41:08Z")

</div>

The changelogs support your finding. Monaco lists the move from monaco.languages.typescript to monaco.typescript as a breaking change in 0.55.0. Node-RED's changelog records the update to Monaco 0.55.1 under 5.0.0-beta.3, rather than under 5.0.9. That points to the namespace change arriving during the 5.0 development cycle, not being newly introduced by the 5.0.9 maintenance release. Code using the old namespace needs to account for that upstream API change.

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<div class="post-metadata">

**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [31 October 2026 17:09 UTC](https://discourse.nodered.org/t/nr-v5-0-9-editor-monaco-error-adding-extra-typescript-definitions/102032/3 "2026-10-31T17:09:20Z")

</div>

> [@TotallyInformation](#):
>
> Can someone confirm if this is correct please

Yes, they removed the `languages` object.

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<div class="post-metadata">

**Author:** ![TotallyInformation](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/totallyinformation/32/31_2.png) [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Post date:** [31 October 2026 17:49 UTC](https://discourse.nodered.org/t/nr-v5-0-9-editor-monaco-error-adding-extra-typescript-definitions/102032/4 "2026-10-31T17:49:30Z")

</div>

Thanks both, I've had to add a test for which version is being used in order for it not to be broken in different versions of Node-RED.

For now though, anyone using v7 UIBUILDER with Node-RED v5.0.9 will not get the function node help for the uibuilder functions. The fix will be in v8.