# What changed in monaco-editor

> 13 changes in monaco-editor 0.55 to 0.56 from its official release notes, upgrade guides and advisories: 1 breaking, 4 new APIs and options. Each one cited. Sources checked 2026-10-17. HTML: https://unstale.sh/npm/monaco-editor/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## monaco-editor 0.56

### Breaking changes

- Markdown from language server protocol servers is no longer treated as trusted. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)

### New APIs and options

- The ?esm query parameter was added to URL references. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)

### Behavior and default changes

- Auto reload is disabled by default. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)
- Exported modules were reorganized, which may affect how developers import them. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)

### Fixes and other changes

- The ESM and AMD entry points were fixed. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)
- A hidden find widget is no longer tabbable. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)
- Color contrast issues in HTML syntax highlighting were fixed. (0.56.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.56.0)

## monaco-editor 0.55

### New APIs and options

- An editor.api.d.ts file was added, providing a declaration file developers can use when working with the editor API. (0.55.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.55.0)
- The playground now supports esmUrl, allowing it to use an ESM URL. (0.55.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.55.0)
- The release includes a first iteration of a Monaco Editor language server protocol client. (0.55.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.55.0)

### Tooling

- Rollup is used for the ESM build and declaration-file bundling. (0.55.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.55.0)

### Fixes and other changes

- Fixes missing language exports. (0.55.1) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.55.1)
- Kotlin number literals were fixed, improving their handling in the editor. (0.55.0) — [release notes](https://github.com/microsoft/monaco-editor/releases/tag/v0.55.0)