Markdown Support for Visual Studio Code

This is a fork of vscode-markdown that experiments for support vscode-web.

Limitation:

No NLS, only english.
No print to pdf.
No welcome message.

All you need for Markdown (keyboard shortcuts, table of contents, auto preview and more).

Note: VS Code has basic Markdown support out-of-the-box (e.g, Markdown preview), please see the official documentation for more information.

Table of Contents

Features
Available Commands
Keyboard Shortcuts
Supported Settings
FAQ
Changelog
Latest Development Build
Contributing
Related

Features

Keyboard shortcuts

(Typo: multiple words)

See full key binding list in the keyboard shortcuts section

Run command "Create Table of Contents" (in the VS Code Command Palette) to insert a new table of contents.
The TOC is automatically updated on file save by default. To disable, please change the toc.updateOnSave option.
The indentation type (tab or spaces) of TOC can be configured per file. Find the setting in the right bottom corner of VS Code's status bar.

Note: Be sure to also check the list.indentationSize option.
To make TOC compatible with GitHub or GitLab, set option slugifyMode accordingly
Three ways to control which headings are present in the TOC:
Click to expand
1. Add  at the end of a heading to ignore it in TOC
  (It can also be placed above a heading)
2. Use toc.levels setting.
3. You can also use the toc.omittedFromToc setting to omit some headings (and their subheadings) from TOC:
```
// In your settings.json
"markdown.extension.toc.omittedFromToc": {
  // Use a path relative to your workspace.
  "README.md": [
      "# Introduction",
      "## Also omitted",
  ],
  // Or an absolute path for standalone files.
  "/home/foo/Documents/todo-list.md": [
    "## Shame list (I'll never do these)",
  ]
}
```
  Note:
  - Setext headings (underlined with === or ---) can also be omitted, just put their # and ## versions in the setting, respectively.
  - When omitting heading, make sure headings within a document are unique. Duplicate headings may lead to unpredictable behavior.
Easily add/update/remove section numbering
In case you are seeing unexpected TOC recognition, you can add a  comment above the list.

List editing

Note: By default, this extension tries to determine indentation size for different lists according to CommonMark Spec. If you prefer to use a fixed tab size, please change the list.indentationSize setting.

Print Markdown to HTML

Commands Markdown: Print current document to HTML and Markdown: Print documents to HTML (batch mode)
Compatible with other installed Markdown plugins (e.g. Markdown Footnotes). The exported HTML should look the same as inside VS Code (except for a few theme colors due to the limitations of APIs).
Use comment  to specify a title of the exported HTML.
Plain links to .md files will be converted to .html.
It's recommended to print the exported HTML to PDF with browser (e.g. Chrome) if you want to share your documents with others.

GitHub Flavored Markdown

Table formatter

Note: The key binding is Ctrl + Shift + I on Linux. See Visual Studio Code Key Bindings.
Task lists

Math

Please use Markdown+Math for dedicated math support. Be sure to disable math.enabled option of this extension.

Auto completions

Tip: also support the option completion.root

Images/Files (respects option search.exclude)
Math functions (including option katex.macros)

$math completions$
Reference links

Others

Paste link on selected text
Add "Close Preview" keybinding, which allows you to close the preview tab using the same keybinding of "Open Preview" (Ctrl + Shift + V or Ctrl + K V).

Available Commands

Markdown All in One: Create Table of Contents
Markdown All in One: Update Table of Contents
Markdown All in One: Add/Update section numbers
Markdown All in One: Remove section numbers
Markdown All in One: Toggle code span
Markdown All in One: Toggle code block
Markdown All in One: Print current document to HTML
Markdown All in One: Print documents to HTML
Markdown All in One: Toggle math environment
Markdown All in One: Toggle list
- It will cycle through list markers (-, *, +, 1. and 1))

Keyboard Shortcuts

Table

Key	Command
`Ctrl`/`Cmd` + `B`	Toggle bold
`Ctrl`/`Cmd` + `I`	Toggle italic
`Alt`+`S` (on Windows)	Toggle strikethrough¹
`Ctrl` + `Shift` + `]`	Toggle heading (uplevel)
`Ctrl` + `Shift` + `[`	Toggle heading (downlevel)
`Ctrl`/`Cmd` + `M`	Toggle math environment
`Alt` + `C`	Check/Uncheck task list item
`Ctrl`/`Cmd` + `Shift` + `V`	Toggle preview
`Ctrl`/`Cmd` + `K` `V`	Toggle preview to side

^{1. If the cursor is on a list/task item without selection, strikethrough will be added to the whole item (line)}

Supported Settings

Table

Name	Default	Description
`markdown.extension.completion.respectVscodeSearchExclude`	`true`	Whether to consider `search.exclude` option when providing file path completions
`markdown.extension.completion.root`		Root folder when providing file path completions (It takes effect when the path starts with `/`)
`markdown.extension.italic.indicator`	`*`	Use `*` or `_` to wrap italic text
`markdown.extension.katex.macros`	`{}`	KaTeX macros e.g. `{ "\\name": "expansion", ... }`
`markdown.extension.list.indentationSize`	`adaptive`	Use different indentation size for ordered and unordered list
`markdown.extension.orderedList.autoRenumber`	`true`	Auto fix list markers as you edits
`markdown.extension.orderedList.marker`	`ordered`	Or `one`: always use `1.` as ordered list marker
`markdown.extension.preview.autoShowPreviewToSide`	`false`	Automatically show preview when opening a Markdown file.
`markdown.extension.print.absoluteImgPath`	`true`	Convert image path to absolute path
`markdown.extension.print.imgToBase64`	`false`	Convert images to base64 when printing to HTML
`markdown.extension.print.includeVscodeStylesheets`	`true`	Whether to include VS Code's default styles
`markdown.extension.print.onFileSave`	`false`	Print to HTML on file save
`markdown.extension.print.theme`	`light`	Theme of the exported HTML
`markdown.extension.print.validateUrls`	`true`	Enable/disable URL validation when printing
`markdown.extension.syntax.decorations`	`true`	Add decorations to ~~strikethrough~~ and `code span`
`markdown.extension.syntax.decorationFileSizeLimit`	50000	Don't render syntax decorations if a file is larger than this size (in byte/B)
`markdown.extension.syntax.plainTheme`	`false`	A distraction-free theme
`markdown.extension.tableFormatter.enabled`	`true`	Enable GFM table formatter
`markdown.extension.toc.slugifyMode`	`github`	Slugify mode for TOC link generation (`vscode`, `github`, `gitlab` or `gitea`)
`markdown.extension.toc.omittedFromToc`	`{}`	Lists of headings to omit by project file (e.g. `{ "README.md": ["# Introduction"] }`)
`markdown.extension.toc.levels`	`1..6`	Control the heading levels to show in the table of contents.
`markdown.extension.toc.orderedList`	`false`	Use ordered list in the table of contents.
`markdown.extension.toc.plaintext`	`false`	Just plain text.
`markdown.extension.toc.unorderedList.marker`	`-`	Use `-`, `*` or `+` in the table of contents (for unordered list)
`markdown.extension.toc.updateOnSave`	`true`	Automatically update the table of contents on save.

FAQ

Q: Error "command 'markdown.extension.onXXXKey' not found"

In most cases, it is because VS Code needs a few seconds to load this extension when you open a Markdown file for the first time. (You will see a message "Activating Extensions..." on the status bar.)
If you still see this "command not found" error after waiting for a long time, please try to restart VS Code. If needed, reinstall this extension:
1. Uninstall this extension.
2. Close and restart VS Code. (important!)
3. Reinstall this extension.
If it doesn't help, feel free to open a new issue on GitHub. It would be better if you can report any suspicious error information to us: It's usually in VS Code's menubar Help > Toggle Developer Tools > Console.
(As a last resort, you may choose to delete onXXXKey keys through VS Code's Keyboard Shortcuts editor if you do not need the list editing feature at all.)

Q: Which Markdown syntax is supported?

CommonMark
Tables, strikethrough and task lists (from GitHub Flavored Markdown)
Math support (from KaTeX)
Front matter

For other Markdown syntax, you need to install the corresponding extensions from VS Code marketplace (e.g. Mermaid diagram, emoji, footnotes and superscript). Once installed, they will take effect in VS Code and also the exported HTML file.

Q: This extension has overridden some of my key bindings (e.g. `Ctrl` + `B`, `Alt` + `C`)

You can easily manage key bindings with VS Code's Keyboard Shortcuts editor. (Commands provided by this extension have prefix markdown.extension.)

Q: The extension is unresponsive, causing lag etc. (performance issues)

From experience, there is a good chance that the performance issues are caused by other extensions (e.g., some spell checker extensions).

This can be verified if you try again with all other extensions disabled (execute Developer: Reload with Extensions Disabled or Extensions: Disable All Installed Extensions for this Workspace in the VS Code command Palette) and then enable this extension.

To find out the root cause, you can install our development build (debug.vsix) and create a CPU profile following this official instruction from the VS Code. And then please open a GitHub issue with that profile (.cpuprofile.txt) attached.

Changelog

See CHANGELOG for more information.

Latest Development Build

Download it here, please click the latest passing event to download artifacts.

There are two versions: markdown-all-in-one-*.vsix is the regular build, while debug.vsix is used to create a verbose CPU profile.

To install, execute Extensions: Install from VSIX... in the VS Code Command Palette (ctrl + shift + p)

Contributing

File bugs, feature requests in GitHub Issues.
Leave a review on Visual Studio Marketplace.
Buy me a coffee ☕ (via PayPal, Alipay or WeChat).

Special thanks to the collaborator @Lemmingh and all other contributors.

More extensions of mine

0x-jerry/vscode-markdown

Markdown Support for Visual Studio Code