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Error when React 19 component has MST node as prop with observer defined later

bugConfirmed bugConfirmed bug

Status: Open.

#2277 In mobxjs/mobx-state-tree;

· filipkis opened on Oct 24, 2025

MSTMap does not have <code>observe</code> method, but IMSTMap does

bugConfirmed bugConfirmed bug

TypescriptIssue related to Typescript typingsIssue related to Typescript typings

Status: Open.

#2275 In mobxjs/mobx-state-tree;

· n9 opened on Jul 23, 2025

Assignment in afterCreate hook being disregarded in React component

Status: Open.

#2268 In mobxjs/mobx-state-tree;

· davetapley opened on Apr 9, 2025

Duplicates in Identifier Cache

needs reproduction/infoNeeds more info or reproduction in order to fix itNeeds more info or reproduction in order to fix it

Status: Open.

#2255 In mobxjs/mobx-state-tree;

· CraigHarley opened on Mar 27, 2025

SnapshotIn Type unexpectedly changed behavior in MST version 7 (when upgrading from 6)

TypescriptIssue related to Typescript typingsIssue related to Typescript typings

Status: Open.

#2254 In mobxjs/mobx-state-tree;

· jrmyio opened on Mar 25, 2025

<code>types.compose</code> does not override base properties for snapshot requirements.

docs or examplesDocumentation or examples relatedDocumentation or examples related

help/PR welcomeHelp/Pull request from contributors to fix the issue is welcomeHelp/Pull request from contributors to fix the issue is welcome

level: easy

Status: Open.

#2253 In mobxjs/mobx-state-tree;

· kylemeenehan opened on Mar 17, 2025

Remove ts-essentials dependency

dependenciesPull requests that update a dependency filePull requests that update a dependency file

help/PR welcomeHelp/Pull request from contributors to fix the issue is welcomeHelp/Pull request from contributors to fix the issue is welcome

level: intermediate

Status: Open.

#2246 In mobxjs/mobx-state-tree;

· coolsoftwaretyler opened on Feb 17, 2025

Enumeration number problem

enhancementPossible enhancementPossible enhancement

help/PR welcomeHelp/Pull request from contributors to fix the issue is welcomeHelp/Pull request from contributors to fix the issue is welcome

level: easy

Status: Open.

#2243 In mobxjs/mobx-state-tree;

· OnkelTem opened on Feb 15, 2025

Replacing large array very slow (possibly due to reconciliation)

bugConfirmed bugConfirmed bug

help/PR welcomeHelp/Pull request from contributors to fix the issue is welcomeHelp/Pull request from contributors to fix the issue is welcome

level: intermediate

Status: Open.

#2237 In mobxjs/mobx-state-tree;

· yossivainshtein opened on Dec 30, 2024

Use Changesets

enhancementPossible enhancementPossible enhancement

hacktoberfest

help/PR welcomeHelp/Pull request from contributors to fix the issue is welcomeHelp/Pull request from contributors to fix the issue is welcome

level: easy

Status: Open.

#2232 In mobxjs/mobx-state-tree;

· coolsoftwaretyler opened on Dec 13, 2024

Move off TSLint

help/PR welcomeHelp/Pull request from contributors to fix the issue is welcomeHelp/Pull request from contributors to fix the issue is welcome

level: easy

Status: Open.

#2227 In mobxjs/mobx-state-tree;

· coolsoftwaretyler opened on Nov 27, 2024

got 「unknown」 type when using Instance&lt;typeof SomeModel&gt;

docs or examplesDocumentation or examples relatedDocumentation or examples related

TypescriptIssue related to Typescript typingsIssue related to Typescript typings

Status: Open.

#2217 In mobxjs/mobx-state-tree;

· JLUiceman opened on Oct 22, 2024