Elixirnote

See the [JupyterLab
2.2](https://github.com/jupyterlab/jupyterlab/milestone/53?closed=1)
milestone on GitHub for the full list of pull requests and issues
closed.

July 2020

We are very excited to add Eric Charles to the core team this month!
([8513](https://github.com/jupyterlab/jupyterlab/pull/8513))

User-facing changes

- Cells can no longer be executed while kernels are terminating or
restarting. There is a new status for these events on the Kernel
Indicator
([8562](https://github.com/jupyterlab/jupyterlab/pull/8562),
[8477](https://github.com/jupyterlab/jupyterlab/issues/8477))

<img alt="An animation of the Jupyterlab interface that demonstrates restarting a kernel and running code cells." src="https://user-images.githubusercontent.com/226720/84566070-966daf80-ad6e-11ea-815b-5f48136b524b.gif" class="jp-screenshot">

- Adds a visual clue for distinguishing hidden files and folders in
the file browser window
([8393](https://github.com/jupyterlab/jupyterlab/pull/8393))

<img alt="A screenshot of the JupyterLab file browser." src="https://user-images.githubusercontent.com/13181907/81358007-3b77d700-90a3-11ea-885c-31628c55744b.png" class="jp-screenshot">

- Enable horizontal scrolling for toolbars to improve mobile
experience
([8417](https://github.com/jupyterlab/jupyterlab/pull/8417))

<img alt="An animation demonstrating improved scrolling and navigation on mobile." src="https://user-images.githubusercontent.com/591645/81733090-bb31e700-9491-11ea-96ab-a4b1695b8e3c.gif" class="jp-screenshot">

- Improves the right-click context menu for the file editor
([8425](https://github.com/jupyterlab/jupyterlab/pull/8425))

<img alt="A context menu in a text file with options like undo and redo." src="https://user-images.githubusercontent.com/25207344/84947222-d8bd2680-b0b7-11ea-98da-e4907f9131ba.png" class="jp-screenshot">

- Merge cell attachments when merging cells
([8427](https://github.com/jupyterlab/jupyterlab/pull/8427),
[8414](https://github.com/jupyterlab/jupyterlab/issues/8414))

<img alt="An animation demonstrating merging two cells with image outputs into one cell with both outputs." src="https://user-images.githubusercontent.com/591645/82072833-97acad80-96d8-11ea-957c-ce006731219b.gif" class="jp-screenshot">

- Add styling for high memory usage warning in status bar with
nbresuse
([8437](https://github.com/jupyterlab/jupyterlab/pull/8437))

<img alt="A status bar message that says memory 110.51 MB used out of 117.25 MB available." src="https://user-images.githubusercontent.com/7725109/82213619-1b150b80-9932-11ea-9a53-570bd82d3d2a.png" class="jp-screenshot">

- Adds support for Python version 3.10
([8445](https://github.com/jupyterlab/jupyterlab/pull/8445))
- Support live editing of SVG with updating rendering
([8495](https://github.com/jupyterlab/jupyterlab/pull/8495),
[8494](https://github.com/jupyterlab/jupyterlab/issues/8494))

<img alt="Demonstrating editing an SVG in one tab and while it is previewed live in another tab." src="https://user-images.githubusercontent.com/45380/83218329-c8123400-a13b-11ea-9137-6b91a29dbc08.png" class="jp-screenshot">

For developers

- Specify that we recommend typescript over javascript for extensions
([8411](https://github.com/jupyterlab/jupyterlab/pull/8411))
- Lazy load codemirror theme stylesheets.
([8506](https://github.com/jupyterlab/jupyterlab/pull/8506))
- Increase the link expiry to one week
([8402](https://github.com/jupyterlab/jupyterlab/pull/8402))
- Add documentation on private npm registry usage
([8455](https://github.com/jupyterlab/jupyterlab/pull/8455),
[7827](https://github.com/jupyterlab/jupyterlab/issues/7827),
[7660](https://github.com/jupyterlab/jupyterlab/issues/7660))
- Add feature request template + slight reorg in readme
([8467](https://github.com/jupyterlab/jupyterlab/pull/8467))
- Add link to react example in extension-examples repo
([8474](https://github.com/jupyterlab/jupyterlab/pull/8474))
- Update documentation of whitelist/blacklist
([8540](https://github.com/jupyterlab/jupyterlab/pull/8540))
- Improve whitelist figure description in documentation
([8517](https://github.com/jupyterlab/jupyterlab/pull/8517))

Bugfixes

- Typo: fix extensino to extension
([8512](https://github.com/jupyterlab/jupyterlab/pull/8512))
- Close correct tab with close tab
([8529](https://github.com/jupyterlab/jupyterlab/pull/8529))
- Remove unused css rules
([8547](https://github.com/jupyterlab/jupyterlab/pull/8547),
[8537](https://github.com/jupyterlab/jupyterlab/issues/8537))
- Fix small typo in getting started docs, proxy
([8549](https://github.com/jupyterlab/jupyterlab/pull/8549))
- Fix link on CI badges
([8603](https://github.com/jupyterlab/jupyterlab/pull/8603))
- Simplified multicursor backspace code
([8523](https://github.com/jupyterlab/jupyterlab/pull/8523))
- Fix recent breaking changes to normalizepath in filebrowser
([8383](https://github.com/jupyterlab/jupyterlab/pull/8383),
[8382](https://github.com/jupyterlab/jupyterlab/issues/8382))
- Fix watch mode and add ci test
([8394](https://github.com/jupyterlab/jupyterlab/pull/8394))
- Address CI failures
([8433](https://github.com/jupyterlab/jupyterlab/pull/8433))
- Fix lint errors in dependency graph script
([8451](https://github.com/jupyterlab/jupyterlab/pull/8451))
- Fix lint complaints coming up from github actions
([8452](https://github.com/jupyterlab/jupyterlab/pull/8452))
- Address CI usage test timeout
([8464](https://github.com/jupyterlab/jupyterlab/pull/8464))
- Add chokidar to dev_mode/package.json
([8481](https://github.com/jupyterlab/jupyterlab/pull/8481))
- Fix autolink
([8496](https://github.com/jupyterlab/jupyterlab/pull/8496))
- Update phosphor aliases
([8498](https://github.com/jupyterlab/jupyterlab/pull/8498))
- Fix default return in Python when extension has no version metadata
([8430](https://github.com/jupyterlab/jupyterlab/pull/8430))
- Updated the installation documentation on read the docs to match the
readme file on the repo
([8386](https://github.com/jupyterlab/jupyterlab/pull/8386))
- Handle quit_button when launched as an extension
([8486](https://github.com/jupyterlab/jupyterlab/pull/8486),
[8483](https://github.com/jupyterlab/jupyterlab/issues/8483))
- Add worker-loader
([8593](https://github.com/jupyterlab/jupyterlab/pull/8593),
[8587](https://github.com/jupyterlab/jupyterlab/issues/8587))

[v2.1.x](https://github.com/jupyterlab/jupyterlab/milestone/55)

- Fix icon sidebar height for third party extensions
([8333](https://github.com/jupyterlab/jupyterlab/pull/8333))
- Pin JupyterLab server requirement more tightly
([8330](https://github.com/jupyterlab/jupyterlab/pull/8330))
- Scrolls cells into view after deletion
([8287](https://github.com/jupyterlab/jupyterlab/pull/8287))
- Sets data attribute on file type in filebrowser
([8275](https://github.com/jupyterlab/jupyterlab/pull/8275))

- Pin puppeteer to fix ci
([8260](https://github.com/jupyterlab/jupyterlab/pull/8260))
- Fix Save As for files without sessions
([8248](https://github.com/jupyterlab/jupyterlab/pull/8248))

April 2020

See the [JupyterLab
2.1](https://github.com/jupyterlab/jupyterlab/milestone/49?closed=1)
milestone on GitHub for the full list of pull requests and issues
closed.

User-facing changes

- Display the extension manager in the left sidebar by default. Users
will need to acknowledge the disclaimer in the extension manager
before using it.
([8050](https://github.com/jupyterlab/jupyterlab/pull/8050),
[8145](https://github.com/jupyterlab/jupyterlab/pull/8145))
- Added `blacklist and whitelist support <extension_listings>` for the
extension manager
([7989](https://github.com/jupyterlab/jupyterlab/pull/7989))
- Automatically link URLs in notebook output text
([8075](https://github.com/jupyterlab/jupyterlab/pull/8075),
[7393](https://github.com/jupyterlab/jupyterlab/issues/7393))
- Added a \"Restart Kernel and Run All Cells...\" button to the
notebook toolbar
([8024](https://github.com/jupyterlab/jupyterlab/pull/8024))

<img alt="The main JupyterLab toolbar with focus on the Restart Kernel and Run All Cells button." src="https://raw.githubusercontent.com/jupyterlab/jupyterlab/3.1.x/docs/source/getting_started/changelog_restartrunallbutton.png" class="jp-screenshot">

- Added a context menu item for opening a Markdown editor from the
Markdown preview
([7942](https://github.com/jupyterlab/jupyterlab/pull/7942))

- Support Node.js 10+
([8112](https://github.com/jupyterlab/jupyterlab/pull/8112),
[8083](https://github.com/jupyterlab/jupyterlab/issues/8083))

- Added a command to replace the selection in an editor with text
(inserting if there is no selection). This can be assigned a
keyboard shortcut, as shown below. We also added a command to go
through a series of commands and run the first enabled command.
([7908](https://github.com/jupyterlab/jupyterlab/pull/7908)) Here
is a keyboard shortcut to insert text in a currently-active notebook
editor:

js
{
command: "notebook:replace-selection",
selector: ".jp-Notebook",
keys: ["Ctrl L"],
args: {text: "lambda x: x"}
}


Here is a keyboard shortcut to insert text into an editor of the
currently active console, file editor, or notebook:

js
{
command: "apputils:run-first-enabled",
selector: "body",
keys: ["Ctrl L"],
args: {
commands: [
"console:replace-selection",
"fileeditor:replace-selection",
"notebook:replace-selection",
],
args: {text: "lambda x: x"}
}
}


For developers

- `NotebookWidgetFactory` is now a plugin so it can be overridden
([8066](https://github.com/jupyterlab/jupyterlab/pull/8066),
[7996](https://github.com/jupyterlab/jupyterlab/issues/7996))
- Many improvements to `LabIcon`: work with all SVG loaders, improve
performance, fix issue with menus from extensions
([8125](https://github.com/jupyterlab/jupyterlab/pull/8125))
- Change the header application area to a box panel, which means the
header area will display if its children set their minimum height
([8059](https://github.com/jupyterlab/jupyterlab/pull/8059),
[7279](https://github.com/jupyterlab/jupyterlab/issues/7279))
- JupyterLab\'s custom context menu is now disabled on all descendants
of a DOM element with a `data-jp-suppress-context-menu` attribute
([7877](https://github.com/jupyterlab/jupyterlab/pull/7877),
[7670](https://github.com/jupyterlab/jupyterlab/issues/7670))

Bugfixes

- Fix property inspector restoration on reload
([8114](https://github.com/jupyterlab/jupyterlab/pull/8114))
- Increase the timeout for yarn
([8104](https://github.com/jupyterlab/jupyterlab/pull/8104),
[8102](https://github.com/jupyterlab/jupyterlab/issues/8102))
- Fix find and replace with empty strings
([8100](https://github.com/jupyterlab/jupyterlab/pull/8100),
[8098](https://github.com/jupyterlab/jupyterlab/issues/8098))
- Select search text when focusing the search overlay
([8073](https://github.com/jupyterlab/jupyterlab/pull/8073),
[7932](https://github.com/jupyterlab/jupyterlab/pull/7932))
- Fix attaching images with spaces in their names to Markdown cells
([8095](https://github.com/jupyterlab/jupyterlab/pull/8095))
- Fix build errors by distributing the `.yarnrc` configuration with
the Python package
([8045](https://github.com/jupyterlab/jupyterlab/pull/8045))
- Throttle fetch requests in the setting registry\'s data connector
([7927](https://github.com/jupyterlab/jupyterlab/pull/7927))
- Close the gap between lines in notebook output
([7832](https://github.com/jupyterlab/jupyterlab/pull/7832),
[7760](https://github.com/jupyterlab/jupyterlab/pull/7760))

April 2020

See the [JupyterLab
2.0.2](https://github.com/jupyterlab/jupyterlab/milestone/50?closed=1)
milestone on GitHub for the full list of pull requests and issues
closed.

- Fix cell execution when recording timing
([8057](https://github.com/jupyterlab/jupyterlab/pull/8057),
[8056](https://github.com/jupyterlab/jupyterlab/issues/8056))
- Fix font settings for the editor
([8004](https://github.com/jupyterlab/jupyterlab/pull/8004),
[7910](https://github.com/jupyterlab/jupyterlab/issues/7910))
- Avoid redundant checkpoint calls on loading a notebook
([7926](https://github.com/jupyterlab/jupyterlab/pull/7926),
[7889](https://github.com/jupyterlab/jupyterlab/issues/7889))
- For developers: make kernel `IFuture.done` typings more correct by
not including `undefined`
([8032](https://github.com/jupyterlab/jupyterlab/pull/8032))

[v2.0.0](https://github.com/jupyterlab/jupyterlab/releases)

February 2020

Here are some highlights for this release. See the [JupyterLab
2.0](https://github.com/jupyterlab/jupyterlab/milestone/36?closed=1)
milestone on GitHub for the full list of pull requests and issues
closed.

User-facing changes

- New user interface for notebook cell tags
([7407](https://github.com/jupyterlab/jupyterlab/pull/7407),
[7786](https://github.com/jupyterlab/jupyterlab/pull/7786))

<img alt="Notebook cell tags in the left sidebar next to an open notebook." src="https://raw.githubusercontent.com/jupyterlab/jupyterlab/3.1.x/docs/source/getting_started/changelog_celltags.png" class="jp-screenshot">

- File info display when hovering on a file in the file browser
([7485](https://github.com/jupyterlab/jupyterlab/pull/7485),
[7352](https://github.com/jupyterlab/jupyterlab/issues/7352))

<img alt="The file browser with a tooltip describing a notebook's info like the name, size, and kernel." src="https://raw.githubusercontent.com/jupyterlab/jupyterlab/3.1.x/docs/source/getting_started/changelog_fileinfo.png" class="jp-screenshot">

- Support for searching outputs in notebooks
([7258](https://github.com/jupyterlab/jupyterlab/pull/7258))

<img alt="A notebook with multiple cells and the cell output searching in the upper right." src="https://raw.githubusercontent.com/jupyterlab/jupyterlab/3.1.x/docs/source/getting_started/changelog_searchoutput.png" class="jp-screenshot">

- `Ctrl Shift .` and `Ctrl Shift ,` shortcuts move focus to the next
and previous tab bar in the main area, respectively
([7673](https://github.com/jupyterlab/jupyterlab/pull/7673))

- `Shift Home` and `Shift End` shortcuts in a notebook select all
cells from the current cell to the top or bottom of a notebook,
respectively
([7177](https://github.com/jupyterlab/jupyterlab/pull/7177))

- Explicit \"No Kernel\" button in the kernel selection dialog for new
notebooks
([7647](https://github.com/jupyterlab/jupyterlab/pull/7647))

- Notebook `recordTiming` advanced setting to control whether
execution timing information is stored in notebook files
([7578](https://github.com/jupyterlab/jupyterlab/pull/7578))

- \"Select current running or last run cell\" command added (requires
notebook `recordTiming` advanced setting to be set to true)
([7551](https://github.com/jupyterlab/jupyterlab/pull/7551))

- Codemirror `lineWiseCopyCut` advanced setting to control the
behavior of the copy/cut keyboard shortcuts when there is no
selection
([7842](https://github.com/jupyterlab/jupyterlab/pull/7842))

- Refreshed the command palette and property inspector sidebar icons
and user interfaces
([7577](https://github.com/jupyterlab/jupyterlab/pull/7577),
[7038](https://github.com/jupyterlab/jupyterlab/issues/7038),
[7733](https://github.com/jupyterlab/jupyterlab/pull/7733),
[7732](https://github.com/jupyterlab/jupyterlab/issues/7732),
[7718](https://github.com/jupyterlab/jupyterlab/pull/7718),
[7686](https://github.com/jupyterlab/jupyterlab/issues/7686))

- \"New File\" and \"New Markdown File\" items in file browser context
menu ([7483](https://github.com/jupyterlab/jupyterlab/pull/7483),
[4280](https://github.com/jupyterlab/jupyterlab/issues/4280))

- \"Download\" item in File menu
([7480](https://github.com/jupyterlab/jupyterlab/pull/7480))

- \"Restart Kernel and Run up to Selected Cell\" item in notebook
Kernel menu
([7789](https://github.com/jupyterlab/jupyterlab/pull/7789),
[6746](https://github.com/jupyterlab/jupyterlab/issues/6746))

- In extension manager, the \"enable\" button is now only shown for
installed extensions
([7482](https://github.com/jupyterlab/jupyterlab/pull/7482))

- Dialogs can now be closed by clicking outside of them
([7885](https://github.com/jupyterlab/jupyterlab/pull/7885),
[3784](https://github.com/jupyterlab/jupyterlab/issues/3784))

- `documentsearch:startWithReplace` command to open the document find
overlay with replace. There is not currently a default keyboard
shortcut for this, but one can be assigned as a custom keyboard
shortcut in Advanced Settings.
([7725](https://github.com/jupyterlab/jupyterlab/pull/7725))

- `` added to the CSV Viewer delimiter options
([7367](https://github.com/jupyterlab/jupyterlab/pull/7367),
[6324](https://github.com/jupyterlab/jupyterlab/issues/6324))

- The JSON viewer now only displays structure hints for arrays and
empty objects for a more streamlined feel
([7227](https://github.com/jupyterlab/jupyterlab/pull/7227))

- Optional platform-aware keyboard shortcut fields `linuxKeys`,
`macKeys`, and `winKeys` in keyboard shortcut definitions
([7589](https://github.com/jupyterlab/jupyterlab/pull/7589))

js
{
command: "application:toggle-mode",
selector: "body",
linuxKeys: ["Ctrl Shift M"], // only linux
macKeys: ["Cmd Shift Z"], // only mac
winKeys: ["Ctrl Shift B"], // only windows
keys: ["Accel Shift U"] // default shortcut
}


- Added options for `jupyter lab clean` to clean specific parts of the
build, such as `--extensions`, `--settings`, `--static`, and `--all`
([7583](https://github.com/jupyterlab/jupyterlab/pull/7583),
[6734](https://github.com/jupyterlab/jupyterlab/pull/6734))

- Removed the vega 4 and vega-lite 2 renderers (vega 5 and vega-lite 4
is included in JupyterLab by default). These legacy renderers may be
available via custom extensions
([7650](https://github.com/jupyterlab/jupyterlab/pull/7650),
[7523](https://github.com/jupyterlab/jupyterlab/issues/7523),
[7658](https://github.com/jupyterlab/jupyterlab/pull/7658))

- JupyterHub users should use the `c.Spawner.default_url = '/lab'`
setting instead of the deprecated and now removed `labhubapp`
([7724](https://github.com/jupyterlab/jupyterlab/pull/7724))

For developers

See `extension_migration` for help in
migrating extensions to JupyterLab 2.0.

Backward incompatible changes

- Switch from `phosphor` to `lumino` dependencies.
([7582](https://github.com/jupyterlab/jupyterlab/pull/7582),
[7534](https://github.com/jupyterlab/jupyterlab/issues/7534),
[7763](https://github.com/jupyterlab/jupyterlab/pull/7763),
[7762](https://github.com/jupyterlab/jupyterlab/issues/7762),
[7595](https://github.com/jupyterlab/jupyterlab/pull/7595))
- Factor out the `settingsregistry` and `statedb` packages from
coreutils
([7681](https://github.com/jupyterlab/jupyterlab/pull/7681),
[7615](https://github.com/jupyterlab/jupyterlab/issues/7615))
- Rework services architecture (sessions, kernels, terminals). Among
these changes, `ClientSession` is renamed to `SessionContext` and
the `IKernelConnection.connectToComm` method is replaced with
`IKernelConnection.createComm` and `IKernelConnection.hasComm`
methods.
([7252](https://github.com/jupyterlab/jupyterlab/pull/7252),
[7674](https://github.com/jupyterlab/jupyterlab/pull/7674),
[7820](https://github.com/jupyterlab/jupyterlab/pull/7820),
[7694](https://github.com/jupyterlab/jupyterlab/pull/7694),
[7690](https://github.com/jupyterlab/jupyterlab/issues/7690),
[7682](https://github.com/jupyterlab/jupyterlab/pull/7682))
- Upgrade to TypeScript 3.7
([7522](https://github.com/jupyterlab/jupyterlab/pull/7522))
- Remove `polling` from coreutils in favor for `lumino/polling`
([7617](https://github.com/jupyterlab/jupyterlab/pull/7617))
- TypeScript strict null checking in core packages
([7657](https://github.com/jupyterlab/jupyterlab/pull/7657),
[7607](https://github.com/jupyterlab/jupyterlab/pull/7607))
- Update state database list method to query based on namespace match.
([7742](https://github.com/jupyterlab/jupyterlab/pull/7742),
[7257](https://github.com/jupyterlab/jupyterlab/issues/7257))
- Address code todo items and deprecations for 2.0
([7720](https://github.com/jupyterlab/jupyterlab/pull/7720),
[7724](https://github.com/jupyterlab/jupyterlab/pull/7724))
- Update Console panel tracker widgets
([7705](https://github.com/jupyterlab/jupyterlab/pull/7705),
[7726](https://github.com/jupyterlab/jupyterlab/issues/7726),
[7648](https://github.com/jupyterlab/jupyterlab/issues/7648),
[7645](https://github.com/jupyterlab/jupyterlab/pull/7645))
- Update contribution guide to require node v12+
([7479](https://github.com/jupyterlab/jupyterlab/pull/7479))
- New API for the `Running` sidebar extension
([6895](https://github.com/jupyterlab/jupyterlab/pull/6895),
[6876](https://github.com/jupyterlab/jupyterlab/issues/6876))
- Clean up handling of icons under unified LabIcon (
[7192](https://github.com/jupyterlab/jupyterlab/pull/7192)
[7700](https://github.com/jupyterlab/jupyterlab/pull/7700),
[7765](https://github.com/jupyterlab/jupyterlab/issues/7765),
[7767](https://github.com/jupyterlab/jupyterlab/pull/7767),
[7800](https://github.com/jupyterlab/jupyterlab/pull/7800),
[7846](https://github.com/jupyterlab/jupyterlab/pull/7846),
[7859](https://github.com/jupyterlab/jupyterlab/issues/7859),
[7864](https://github.com/jupyterlab/jupyterlab/pull/7864),
[7886](https://github.com/jupyterlab/jupyterlab/pull/7886))

Other changes

- New property inspector used to display the properties of the
currently selected main area widget
([7665](https://github.com/jupyterlab/jupyterlab/pull/7665),
[7664](https://github.com/jupyterlab/jupyterlab/issues/7664),
[7718](https://github.com/jupyterlab/jupyterlab/pull/7718),
[7686](https://github.com/jupyterlab/jupyterlab/issues/7686))
- Allow metadata for launcher items
([7654](https://github.com/jupyterlab/jupyterlab/pull/7654),
[7652](https://github.com/jupyterlab/jupyterlab/issues/7652))
- Allow default file browser to restore manually.
([7695](https://github.com/jupyterlab/jupyterlab/pull/7695),
[4009](https://github.com/jupyterlab/jupyterlab/issues/4009))
- Upgrade bundled yarn to 1.21.1
([7691](https://github.com/jupyterlab/jupyterlab/pull/7691),
[7692](https://github.com/jupyterlab/jupyterlab/issues/7692))
- Make session dialogs configurable
([7618](https://github.com/jupyterlab/jupyterlab/pull/7618),
[7616](https://github.com/jupyterlab/jupyterlab/issues/7616))
- Support transient editor configs
([7611](https://github.com/jupyterlab/jupyterlab/pull/7611),
[7295](https://github.com/jupyterlab/jupyterlab/issues/7295))
- Optionally force new browser tab
([7603](https://github.com/jupyterlab/jupyterlab/pull/7603),
[7602](https://github.com/jupyterlab/jupyterlab/issues/7602))
- Update core dependencies (e.g., `codemirror`, `xterm.js`,
`markdown`, `fontawesome`, etc.)
([7590](https://github.com/jupyterlab/jupyterlab/pull/7590),
[7194](https://github.com/jupyterlab/jupyterlab/issues/7194),
[7326](https://github.com/jupyterlab/jupyterlab/pull/7326),
[6479](https://github.com/jupyterlab/jupyterlab/issues/6479),
[7769](https://github.com/jupyterlab/jupyterlab/pull/7769))
- Add storybook to `ui-components`
([7588](https://github.com/jupyterlab/jupyterlab/pull/7588),
[6799](https://github.com/jupyterlab/jupyterlab/issues/6799))
- Add explicit documentation encouraging people to re-use lab
components
([7543](https://github.com/jupyterlab/jupyterlab/pull/7543))
- Enable TypeScript sourcemaps for debugging locally installed
labextensions
([7541](https://github.com/jupyterlab/jupyterlab/pull/7541))
- Add `UseSignal` example to the docs
([7519](https://github.com/jupyterlab/jupyterlab/pull/7519))
- Add `env` prop to kernel options
([7499](https://github.com/jupyterlab/jupyterlab/pull/7499))
- Add kernelspec metadata
([7229](https://github.com/jupyterlab/jupyterlab/pull/7229),
[7228](https://github.com/jupyterlab/jupyterlab/issues/7228))
- Allow different mimetypes for the clipboard data
([7202](https://github.com/jupyterlab/jupyterlab/pull/7202))
- Add password dialog to apputils
([7855](https://github.com/jupyterlab/jupyterlab/pull/7855))
- Alias phosphor packages to lumino to allow a deprecation period for
phosphor
([7893](https://github.com/jupyterlab/jupyterlab/pull/7893))
- Match react version in ui-components peerdependencies
([7794](https://github.com/jupyterlab/jupyterlab/pull/7794))
- Fix lint-staged for both win and mac
([7784](https://github.com/jupyterlab/jupyterlab/pull/7784))
- Update websocket workaround for node environments
([7780](https://github.com/jupyterlab/jupyterlab/pull/7780),
[6934](https://github.com/jupyterlab/jupyterlab/pull/6934))
- Fix handling of linked extensions
([7728](https://github.com/jupyterlab/jupyterlab/pull/7728),
[6738](https://github.com/jupyterlab/jupyterlab/issues/6738))
- Fix extension compatibility checks for prereleases and extensions
supporting multiple major versions of JupyterLab
([7723](https://github.com/jupyterlab/jupyterlab/pull/7723),
[7241](https://github.com/jupyterlab/jupyterlab/issues/7241),
[7919](https://github.com/jupyterlab/jupyterlab/pull/7919))
- Teach update-dependency about more range specifiers and make it
adopt the current range for any tag
([7709](https://github.com/jupyterlab/jupyterlab/pull/7709))
- Add support for giving a rank to items in the top area
([7278](https://github.com/jupyterlab/jupyterlab/pull/7278))
- Apply all options to the initial JupyterLab application instance
([7251](https://github.com/jupyterlab/jupyterlab/pull/7251))

Bugfixes

- \"Copy Shareable Link\" in the file browser context menu now
properly works in JupyterHub
([7906](https://github.com/jupyterlab/jupyterlab/pull/7906))
- Update Mathjax CDN in the cell and console examples
([7680](https://github.com/jupyterlab/jupyterlab/pull/7680))
- Revert ensure-max-old-space now that Node 12+ has better default
memory ceilings
([7677](https://github.com/jupyterlab/jupyterlab/pull/7677),
[7675](https://github.com/jupyterlab/jupyterlab/issues/7675))
- Resolve race condition between default file browser and tree urls.
([7676](https://github.com/jupyterlab/jupyterlab/pull/7676),
[4009](https://github.com/jupyterlab/jupyterlab/issues/4009))
- Fix handling of code editor refresh
([7672](https://github.com/jupyterlab/jupyterlab/pull/7672),
[7671](https://github.com/jupyterlab/jupyterlab/issues/7671))
- Start new notebooks in edit mode
([7666](https://github.com/jupyterlab/jupyterlab/pull/7666),
[6731](https://github.com/jupyterlab/jupyterlab/issues/6731))
- Use consistent versions of React
([7661](https://github.com/jupyterlab/jupyterlab/pull/7661),
[7655](https://github.com/jupyterlab/jupyterlab/issues/7655))
- Add scrollbar styles to nbconvert-css
([7653](https://github.com/jupyterlab/jupyterlab/pull/7653))
- Close output views when corresponding notebooks are closed
([7633](https://github.com/jupyterlab/jupyterlab/pull/7633),
[7301](https://github.com/jupyterlab/jupyterlab/issues/7301))
- Fixed incorrect white background for new command palette icon
([7609](https://github.com/jupyterlab/jupyterlab/pull/7609),
[7577](https://github.com/jupyterlab/jupyterlab/issues/7577))
- Block fetching the settings for a plugin that is disabled
([7147](https://github.com/jupyterlab/jupyterlab/pull/7147))
- When timing metadata changes, ensure signal fires
([7576](https://github.com/jupyterlab/jupyterlab/pull/7576))
- Prevent memory leaks in Vega renderer
([7564](https://github.com/jupyterlab/jupyterlab/pull/7564))
- Handle cell execution cancellation when cell is disposed
([7555](https://github.com/jupyterlab/jupyterlab/pull/7555),
[7554](https://github.com/jupyterlab/jupyterlab/issues/7554))
- Fix dropdown option style issue on Windows
([7513](https://github.com/jupyterlab/jupyterlab/pull/7513))
- Make sure label is linked to a control when checking for element
type ([7458](https://github.com/jupyterlab/jupyterlab/pull/7458))
- Refine log console message UX
([7448](https://github.com/jupyterlab/jupyterlab/pull/7448),
[7444](https://github.com/jupyterlab/jupyterlab/issues/7444),
[7443](https://github.com/jupyterlab/jupyterlab/issues/7443))
- Fix multicursor backspacing
([7401](https://github.com/jupyterlab/jupyterlab/pull/7401),
[7205](https://github.com/jupyterlab/jupyterlab/issues/7205))
- Reset log display and count when non-notebook tab gets activated
([7334](https://github.com/jupyterlab/jupyterlab/pull/7334),
[7325](https://github.com/jupyterlab/jupyterlab/issues/7325))
- Fix Safari multiple tabs by working around a Safari bug.
([7316](https://github.com/jupyterlab/jupyterlab/pull/7316),
[6921](https://github.com/jupyterlab/jupyterlab/issues/6921))
- Skip custom click behavior on links when the download attribute is
set ([7311](https://github.com/jupyterlab/jupyterlab/pull/7311),
[5443](https://github.com/jupyterlab/jupyterlab/issues/5443))
- Fix context menu hit test to deal with SVG nodes.
([7242](https://github.com/jupyterlab/jupyterlab/pull/7242),
[7224](https://github.com/jupyterlab/jupyterlab/issues/7224))
- Fix overwriting of target attribute of anchors rendered by
`IPython.display`
([7215](https://github.com/jupyterlab/jupyterlab/pull/7215),
[6827](https://github.com/jupyterlab/jupyterlab/issues/6827))
- Fix file browser location in tree view
([7155](https://github.com/jupyterlab/jupyterlab/pull/7155))
- Stop too many fetch calls in docmanager-extension
([7879](https://github.com/jupyterlab/jupyterlab/pull/7879),
[7874](https://github.com/jupyterlab/jupyterlab/pull/7874))
- Ensures that `Shift Tab` dedent shortcut works correctly in the file
editor
([7865](https://github.com/jupyterlab/jupyterlab/pull/7865))
- Fix unexpected jump to last search result when using documentsearch
([7835](https://github.com/jupyterlab/jupyterlab/pull/7835))
- Fixed refresh issue for html viewer
([7824](https://github.com/jupyterlab/jupyterlab/pull/7824),
[7552](https://github.com/jupyterlab/jupyterlab/pull/7552))
- Fix for center-aligned images with IPython.display.image
([7798](https://github.com/jupyterlab/jupyterlab/pull/7798))
- Changes to setting editor should trigger application dirty state
([7774](https://github.com/jupyterlab/jupyterlab/pull/7774),
[7757](https://github.com/jupyterlab/jupyterlab/issues/7757))
- Move vega from \"devdependencies\" to \"dependencies\"
([7699](https://github.com/jupyterlab/jupyterlab/pull/7699),
[7689](https://github.com/jupyterlab/jupyterlab/issues/7689))
- Restore default file browser manually.
([7695](https://github.com/jupyterlab/jupyterlab/pull/7695),
[4009](https://github.com/jupyterlab/jupyterlab/issues/4009))
- Use default `app_dir` when `app_dir` is `''`
([7268](https://github.com/jupyterlab/jupyterlab/pull/7268),
[7264](https://github.com/jupyterlab/jupyterlab/issues/7264))

October 29, 2019

Here are some highlights for this release. See the [JupyterLab
1.2.0](https://github.com/jupyterlab/jupyterlab/milestone/38?closed=1)
milestone on GitHub for the full list of pull requests and issues
closed.

User-facing changes

- Select cells from the current cell to the top of the notebook with
`Shift Home`, to the bottom of the notebook with `Shift End`
([7336](https://github.com/jupyterlab/jupyterlab/pull/7336),
[6783](https://github.com/jupyterlab/jupyterlab/pull/6783))
- Add a log console extension to display unhandled messages and other
activity
([7318](https://github.com/jupyterlab/jupyterlab/pull/7318),
[7319](https://github.com/jupyterlab/jupyterlab/pull/7319),
[7379](https://github.com/jupyterlab/jupyterlab/pull/7379),
[7399](https://github.com/jupyterlab/jupyterlab/pull/7399),
[7406](https://github.com/jupyterlab/jupyterlab/pull/7406),
[7421](https://github.com/jupyterlab/jupyterlab/pull/7421))
- Allow the npm `max-old-space` option to be specified outside of
JupyterLab
([7317](https://github.com/jupyterlab/jupyterlab/pull/7317))
- Only display node structure in a JSON tree view for arrays and empty
objects
([7261](https://github.com/jupyterlab/jupyterlab/pull/7261))
- Make much smaller distribution packages by not building JavaScript
source maps for releases.
([7150](https://github.com/jupyterlab/jupyterlab/pull/7150))
- Add support for pasting cell attachments and dragging attachments
from the file browser
([5913](https://github.com/jupyterlab/jupyterlab/pull/5913),
[5744](https://github.com/jupyterlab/jupyterlab/issues/5744))
- Add a new `registry` configuration parameter to override the default
yarn repository when building
([7363](https://github.com/jupyterlab/jupyterlab/pull/7363),
[7109](https://github.com/jupyterlab/jupyterlab/pull/7109),
[7249](https://github.com/jupyterlab/jupyterlab/pull/7249),
[7248](https://github.com/jupyterlab/jupyterlab/issues/7248))

For developers

- Update the Markdown renderer (`marked`) to 0.7.0
([7328](https://github.com/jupyterlab/jupyterlab/pull/7328))
- Remove datagrid as a singleton, allowing extensions to use newer
versions
([7312](https://github.com/jupyterlab/jupyterlab/pull/7312))
- Add metadata to the kernelspec information
([7234](https://github.com/jupyterlab/jupyterlab/pull/7234))
- Allow different mimetypes for the clipboard data
([7233](https://github.com/jupyterlab/jupyterlab/pull/7233))
- Add inline svg icon support to toolbar buttons
([7232](https://github.com/jupyterlab/jupyterlab/pull/7232))
- Add PageConfig functions to query if a plugin is deferred or
disabled
([7216](https://github.com/jupyterlab/jupyterlab/pull/7216))
- Allow for renderers for nbformat.ierror to be created
([7203](https://github.com/jupyterlab/jupyterlab/pull/7203),
[7193](https://github.com/jupyterlab/jupyterlab/issues/7193))
- Refactor `fileeditor-extension` for modularization
([6904](https://github.com/jupyterlab/jupyterlab/pull/6904))
- Add execution timing to cells
([6864](https://github.com/jupyterlab/jupyterlab/pull/6864),
[3320](https://github.com/jupyterlab/jupyterlab/issues/3320))

Bugfixes

- Fix the `file-browser-path` query parameter
([7313](https://github.com/jupyterlab/jupyterlab/pull/7313))
- Skip custom click behavior on links when the download attribute is
set ([7323](https://github.com/jupyterlab/jupyterlab/pull/7323))
- Fix opening multiple browser tabs in Safari
([7322](https://github.com/jupyterlab/jupyterlab/pull/7322))
- Fix context menus on SVG icons
([7263](https://github.com/jupyterlab/jupyterlab/pull/7263))
- Fix overwriting of target attribute of anchors rendered by
`IPython.display`
([7231](https://github.com/jupyterlab/jupyterlab/pull/7231))
- Fix multi-cursor backspacing
([7205](https://github.com/jupyterlab/jupyterlab/pull/7205),
[7401](https://github.com/jupyterlab/jupyterlab/pull/7401),
[7413](https://github.com/jupyterlab/jupyterlab/pull/7413))
- Fix mult-cursor cell splitting
([7207](https://github.com/jupyterlab/jupyterlab/pull/7207),
[7417](https://github.com/jupyterlab/jupyterlab/pull/7417),
[7419](https://github.com/jupyterlab/jupyterlab/pull/7419))