% Copyright (c) Jupyter Development Team.

% Distributed under the terms of the Modified BSD License.

(lsp)=

# Language Server Protocol support

:::{warning}
As of JupyterLab 4.2, there is no user-facing integration of Language Server Protocol (LSP); to take advantage of LSP you need to install an extension, such as [jupyterlab-lsp](https://jupyterlab-lsp.readthedocs.io/).
:::

JupyterLab ships with components enabling extensions to handle and communicate with language servers.

The LSP service is disabled by default, it can be enabled by togging the _Activate_ option in the _Language Servers_ section of the setting page.
Enabling the service will not have any effect unless extensions providing integration with the editor (or other elements of JupyterLab UI) are installed.

## Requirements

By default JupyterLab does not come with any language servers installed.
For the list of LSP servers tested with `jupyter-lsp`, the jupyter-server extension which spawns and communicates with the servers, see the [documentation of the extension](https://jupyterlab-lsp.readthedocs.io/en/latest/Language%20Servers.html).

## Settings

The settings for language servers can be found on the settings page of JupyterLab (_Settings > Settings Editor > Language Servers (Experimental)_).

- **Activate**: this option allows users to enable or disable the LSP services.
- **Language Server**: this section allows users to configure the installed language servers.

:::{figure} ./images/lsp/settings.png
Language servers setting page.
:::

Please note that this settings page will be replaced by a more sophisticated editor accessible under _Language Servers_ section when `jupyterlab-lsp` is installed.