# Markdown Support for Visual Studio Code
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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](https://code.visualstudio.com/docs/languages/markdown) for more information.
**Table of Contents**
- [Features](#features)
- [Keyboard shortcuts](#keyboard-shortcuts)
- [Table of contents](#table-of-contents)
- [List editing](#list-editing)
- [Print Markdown to HTML](#print-markdown-to-html)
- [GitHub Flavored Markdown](#github-flavored-markdown)
- [Math](#math)
- [Auto completions](#auto-completions)
- [Others](#others)
- [Available Commands](#available-commands)
- [Keyboard Shortcuts](#keyboard-shortcuts-1)
- [Supported Settings](#supported-settings)
- [FAQ](#faq)
- [Q: Error "command 'markdown.extension.onXXXKey' not found"](#q-error-command-markdownextensiononxxxkey-not-found)
- [Q: Which Markdown syntax is supported?](#q-which-markdown-syntax-is-supported)
- [Q: This extension has overridden some of my key bindings (e.g. Ctrl + B, Alt + C)](#q-this-extension-has-overridden-some-of-my-key-bindings-eg-ctrl--b-alt--c)
- [Q: The extension is unresponsive, causing lag etc. (performance issues)](#q-the-extension-is-unresponsive-causing-lag-etc-performance-issues)
- [Changelog](#changelog)
- [Latest Development Build](#latest-development-build)
- [Contributing](#contributing)
- [Related](#related)
## Features
### Keyboard shortcuts
(Typo: multiple words)
See full key binding list in the [keyboard shortcuts](#keyboard-shortcuts-1) section
### Table of contents
- Run command "**Create Table of Contents**" (in the [VS Code Command Palette](https://code.visualstudio.com/docs/getstarted/userinterface#_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:
```js
// 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](https://spec.commonmark.org/0.29/#list-items). 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](https://marketplace.visualstudio.com/items?itemName=bierner.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 `` (in the first line) 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](https://code.visualstudio.com/docs/getstarted/keybindings#_keyboard-shortcuts-reference).
- Task lists
### Math
Please use [Markdown+Math](https://marketplace.visualstudio.com/items?itemName=goessner.mdmath) 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`)
- 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 (by default `-`, `*`, `+`, `1.` and `1)`, which can be changed with option `list.toggle.candidate-markers`).
## 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.bold.indicator` | `**` | Use `**` or `__` to wrap bold 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.list.toggle.candidate-markers` | `[ "-", "*", "+", "1.", "1)" ]` | Use a array for toggle ordered list marker e.g. `["*", "1."]` |
| `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](https://github.com/yzhang-gh/vscode-markdown/issues/new/choose). 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](https://code.visualstudio.com/docs/getstarted/keybindings) if you do not need the [list editing feature](https://github.com/yzhang-gh/vscode-markdown#list-editing) at all.)
#### Q: Which Markdown syntax is supported?
- [CommonMark](https://spec.commonmark.org/)
- [Tables](https://help.github.com/articles/organizing-information-with-tables/), [strikethrough](https://help.github.com/articles/basic-writing-and-formatting-syntax/#styling-text) and [task lists](https://docs.github.com/en/github/writing-on-github/basic-writing-and-formatting-syntax#task-lists) (from GitHub Flavored Markdown)
- [Math support](https://github.com/waylonflinn/markdown-it-katex#syntax) (from KaTeX)
- [Front matter](https://github.com/ParkSB/markdown-it-front-matter#valid-front-matter)
For other Markdown syntax, you need to install the corresponding extensions from VS Code marketplace (e.g. [Mermaid diagram](https://marketplace.visualstudio.com/items?itemName=bierner.markdown-mermaid), [emoji](https://marketplace.visualstudio.com/items?itemName=bierner.markdown-emoji), [footnotes](https://marketplace.visualstudio.com/items?itemName=bierner.markdown-footnotes) and [superscript](https://marketplace.visualstudio.com/items?itemName=DevHawk.markdown-sup)). 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](https://code.visualstudio.com/docs/getstarted/keybindings). (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](#latest-development-build) (`debug.vsix`) and create a CPU profile following this official [instruction](https://github.com/microsoft/vscode/wiki/Performance-Issues#profile-the-running-extensions) from the VS Code. And then please open a GitHub issue with that profile (`.cpuprofile.txt`) attached.
## Changelog
See [CHANGELOG](CHANGELOG.md) for more information.
## Latest Development Build
Download it [here](https://github.com/yzhang-gh/vscode-markdown/actions/workflows/main.yml?query=event%3Apush+is%3Asuccess), 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](https://github.com/yzhang-gh/vscode-markdown/issues).
- Leave a review on [Visual Studio Marketplace](https://marketplace.visualstudio.com/items?itemName=yzhang.markdown-all-in-one#review-details).
- Buy me a coffee ☕ (via [PayPal](https://www.paypal.me/2yzhang), [Alipay or WeChat](donate.md)).
Special thanks to the collaborator [@Lemmingh](https://github.com/Lemmingh) and all other [contributors](https://github.com/yzhang-gh/vscode-markdown/graphs/contributors).
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## Related
[More extensions of mine](https://marketplace.visualstudio.com/publishers/yzhang)