1547 lines
49 KiB
Markdown
1547 lines
49 KiB
Markdown
---
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stage: Create
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group: Source Code
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info: "To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments"
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type: reference, howto
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---
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# GitLab Flavored Markdown **(FREE)**
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GitLab automatically renders Markdown content. For example, when you add a comment to an issue,
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you type the text in the Markdown language. When you save the issue, the text is rendered
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with a set of styles. These styles are described on this page.
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For example, in Markdown, an ordered list looks like this:
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```markdown
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- Cat
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- Dog
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- Turtle
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```
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When this list is rendered, it looks like this:
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- Cat
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- Dog
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- Turtle
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These styles are **valid for GitLab only**. The [GitLab documentation website](https://docs.gitlab.com)
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and the [main GitLab website](https://about.gitlab.com) use [Kramdown](https://kramdown.gettalong.org) instead.
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You should not view this page in the documentation, but instead [view these styles as they appear on GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md).
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GitLab Flavored Markdown extends the [CommonMark specification](https://spec.commonmark.org/current/).
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It was inspired by [GitHub Flavored Markdown](https://docs.github.com/en/github/writing-on-github/basic-writing-and-formatting-syntax).
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## Where you can use GitLab Flavored Markdown
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You can use GitLab Flavored Markdown in the following areas:
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- Comments
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- Issues
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- Merge requests
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- Milestones
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- Snippets (the snippet must be named with a `.md` extension)
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- Wiki pages
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- Markdown documents inside repositories
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- Epics
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You can also use other rich text files in GitLab. You might have to install a dependency
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to do so. For more information, see the [`gitlab-markup` gem project](https://gitlab.com/gitlab-org/gitlab-markup).
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### Differences between GitLab Flavored Markdown and standard Markdown
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GitLab uses standard CommonMark formatting. However, GitLab Flavored Markdown
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extends standard Markdown with features made specifically for GitLab.
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Features not found in standard Markdown:
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- [Color chips written in `HEX`, `RGB` or `HSL`](#colors)
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- [Diagrams and flowcharts](#diagrams-and-flowcharts)
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- [Emoji](#emojis)
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- [Front matter](#front-matter)
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- [Inline diffs](#inline-diff)
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- [Math equations and symbols written in LaTeX](#math)
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- [Task Lists](#task-lists)
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- [Table of Contents](#table-of-contents)
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- [Wiki specific Markdown](#wiki-specific-markdown)
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Features [extended from standard Markdown](#features-extended-from-standard-markdown):
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| Standard Markdown | Extended Markdown in GitLab |
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| ------------------------------------- | ------------------------- |
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| [blockquotes](#blockquotes) | [multi-line blockquotes](#multiline-blockquote) |
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| [code blocks](#code-spans-and-blocks) | [colored code and syntax highlighting](#colored-code-and-syntax-highlighting) |
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| [emphasis](#emphasis) | [multiple underscores in words](#multiple-underscores-in-words-and-mid-word-emphasis)
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| [headers](#headers) | [linkable Header IDs](#header-ids-and-links) |
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| [images](#images) | [embedded videos](#videos) and [audio](#audio) |
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| [line breaks](#line-breaks) | [more line break control](#newlines) |
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| [links](#links) | [automatically linking URLs](#url-auto-linking) |
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## Features not found in standard Markdown
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The following features are not found in standard Markdown.
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### Colors
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[View this topic in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#colors).
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You can write a color in the formats: `HEX`, `RGB`, or `HSL`.
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- `HEX`: `` `#RGB[A]` `` or `` `#RRGGBB[AA]` ``
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- `RGB`: `` `RGB[A](R, G, B[, A])` ``
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- `HSL`: `` `HSL[A](H, S, L[, A])` ``
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Named colors are not supported.
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Colors in backticks are followed by a color indicator:
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```markdown
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- `#F00`
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- `#F00A`
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- `#FF0000`
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- `#FF0000AA`
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- `RGB(0,255,0)`
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- `RGB(0%,100%,0%)`
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- `RGBA(0,255,0,0.3)`
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- `HSL(540,70%,50%)`
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- `HSLA(540,70%,50%,0.3)`
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```
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- `#F00`
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- `#F00A`
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- `#FF0000`
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- `#FF0000AA`
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- `RGB(0,255,0)`
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- `RGB(0%,100%,0%)`
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- `RGBA(0,255,0,0.3)`
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- `HSL(540,70%,50%)`
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- `HSLA(540,70%,50%,0.3)`
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### Diagrams and flowcharts
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You can generate diagrams and flowcharts from text by using [Mermaid](https://mermaidjs.github.io/) or [PlantUML](https://plantuml.com).
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You can also use [Kroki](https://kroki.io) to create a wide variety of diagrams.
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#### Mermaid
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> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/15107) in GitLab 10.3.
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Visit the [official page](https://mermaidjs.github.io/) for more details. The
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[Mermaid Live Editor](https://mermaid-js.github.io/mermaid-live-editor/) helps you
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learn Mermaid and debug issues in your Mermaid code. Use it to identify and resolve
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issues in your diagrams.
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To generate a diagram or flowchart, write your text inside the `mermaid` block:
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````markdown
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```mermaid
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graph TD;
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A-->B;
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A-->C;
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B-->D;
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C-->D;
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```
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````
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```mermaid
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graph TD;
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A-->B;
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A-->C;
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B-->D;
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C-->D;
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```
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You can also include subgraphs:
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````markdown
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```mermaid
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graph TB
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SubGraph1 --> SubGraph1Flow
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subgraph "SubGraph 1 Flow"
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SubGraph1Flow(SubNode 1)
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SubGraph1Flow -- Choice1 --> DoChoice1
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SubGraph1Flow -- Choice2 --> DoChoice2
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end
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subgraph "Main Graph"
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Node1[Node 1] --> Node2[Node 2]
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Node2 --> SubGraph1[Jump to SubGraph1]
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SubGraph1 --> FinalThing[Final Thing]
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end
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```
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````
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```mermaid
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graph TB
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SubGraph1 --> SubGraph1Flow
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subgraph "SubGraph 1 Flow"
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SubGraph1Flow(SubNode 1)
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SubGraph1Flow -- Choice1 --> DoChoice1
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SubGraph1Flow -- Choice2 --> DoChoice2
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end
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subgraph "Main Graph"
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Node1[Node 1] --> Node2[Node 2]
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Node2 --> SubGraph1[Jump to SubGraph1]
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SubGraph1 --> FinalThing[Final Thing]
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end
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```
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#### PlantUML
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To make PlantUML available in GitLab, a GitLab administrator must enable it. For more information, see the
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[PlantUML & GitLab](../administration/integration/plantuml.md) page.
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#### Kroki
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To make Kroki available in GitLab, a GitLab administrator must enable it.
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For more information, see the [Kroki integration](../administration/integration/kroki.md) page.
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### Emojis
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[View this topic in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#emojis).
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```markdown
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Sometimes you want to :monkey: around a bit and add some :star2: to your :speech_balloon:. Well we have a gift for you:
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:zap: You can use emoji anywhere GitLab Flavored Markdown is supported. :v:
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You can use it to point out a :bug: or warn about :speak_no_evil: patches. And if someone improves your really :snail: code, send them some :birthday:. People :heart: you for that.
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If you're new to this, don't be :fearful:. You can join the emoji :family:. All you need to do is to look up one of the supported codes.
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Consult the [Emoji Cheat Sheet](https://www.emojicopy.com) for a list of all supported emoji codes. :thumbsup:
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```
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Sometimes you want to <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/monkey.png" width="20px" height="20px" style="display:inline;margin:0;border: 0"> around a bit and add some <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/star2.png" width="20px" height="20px" style="display:inline;margin:0;border: 0"> to your <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/speech_balloon.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">. Well we have a gift for you:
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<img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/zap.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">You can use emoji anywhere GitLab Flavored Markdown is supported. <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/v.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">
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You can use it to point out a<img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/bug.png" width="20px" height="20px" style="display:inline;margin:0;border: 0"> or warn about <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/speak_no_evil.png" width="20px" height="20px" style="display:inline;margin:0;border: 0"> patches. If someone improves your really <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/snail.png" width="20px" height="20px" style="display:inline;margin:0;border: 0"> code, send them some <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/birthday.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">. People <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/heart.png" width="20px" height="20px" style="display:inline;margin:0;border: 0"> you for that.
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If you're new to this, don't be <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/fearful.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">. You can join the emoji <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/family.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">. All you need to do is to look up one of the supported codes.
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Consult the [Emoji Cheat Sheet](https://www.webfx.com/tools/emoji-cheat-sheet/) for a list of all supported emoji codes. <img src="https://gitlab.com/gitlab-org/gitlab-foss/raw/master/app/assets/images/emoji/thumbsup.png" width="20px" height="20px" style="display:inline;margin:0;border: 0">
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#### Emojis and your operating system
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The previous emoji example uses hard-coded images. Rendered emojis
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in GitLab may be different depending on the OS and browser used.
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Most emojis are natively supported on macOS, Windows, iOS, Android, and fall back on image-based
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emojis where there is no support.
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<!-- vale gitlab.Spelling = NO -->
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On Linux, you can download [Noto Color Emoji](https://www.google.com/get/noto/help/emoji/)
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to get full native emoji support. Ubuntu 18.04 (like many modern Linux distributions) has
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this font installed by default.
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<!-- vale gitlab.Spelling = YES -->
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### Front matter
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> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/23331) in GitLab 11.6.
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Front matter is metadata included at the beginning of a Markdown document, preceding
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the content. This data can be used by static site generators like [Jekyll](https://jekyllrb.com/docs/front-matter/),
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[Hugo](https://gohugo.io/content-management/front-matter/), and many other applications.
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When you view a Markdown file rendered by GitLab, front matter is displayed as-is,
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in a box at the top of the document. The HTML content displays after the front matter. To view an example,
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you can toggle between the source and rendered version of a
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[GitLab documentation file](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/README.md).
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In GitLab, front matter is used only in Markdown files and wiki pages, not the other
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places where Markdown formatting is supported. It must be at the very top of the document
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and must be between delimiters.
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The following delimiters are supported:
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- YAML (`---`):
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```yaml
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---
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title: About Front Matter
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example:
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language: yaml
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---
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```
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- TOML (`+++`):
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```toml
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+++
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title = "About Front Matter"
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[example]
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language = "toml"
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+++
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```
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- JSON (`;;;`):
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```json
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;;;
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{
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"title": "About Front Matter"
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"example": {
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"language": "json"
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}
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}
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;;;
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```
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Other languages are supported by adding a specifier to any of the existing
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delimiters. For example:
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```php
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---php
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$title = "About Front Matter";
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$example = array(
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'language' => "php",
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);
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---
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```
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### Inline diff
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[View this topic in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#inline-diff).
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With inline diff tags, you can display `{+ additions +}` or `[- deletions -]`.
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The wrapping tags can be either curly braces or square brackets:
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```markdown
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- {+ addition 1 +}
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- [+ addition 2 +]
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- {- deletion 3 -}
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- [- deletion 4 -]
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```
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---
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However, you cannot mix the wrapping tags:
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```markdown
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- {+ addition +]
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- [+ addition +}
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- {- deletion -]
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- [- deletion -}
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```
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If your diff includes words in `` `code` `` font, make sure to escape each backtick `` ` `` with a
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backslash `\`. Otherwise the diff highlight does not render correctly:
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```markdown
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- {+ Just regular text +}
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- {+ Text with `backticks` inside +}
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- {+ Text with escaped \`backticks\` inside +}
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```
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### Math
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[View this topic in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#math).
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Math written in LaTeX syntax is rendered with [KaTeX](https://github.com/KaTeX/KaTeX).
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Math written between dollar signs `$` is rendered inline with the text. Math written
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in a [code block](#code-spans-and-blocks) with the language declared as `math` is rendered
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on a separate line:
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````markdown
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This math is inline $`a^2+b^2=c^2`$.
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This is on a separate line:
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```math
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a^2+b^2=c^2
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```
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````
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This math is inline $`a^2+b^2=c^2`$.
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This is on a separate line
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```math
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a^2+b^2=c^2
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```
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_KaTeX only supports a [subset](https://katex.org/docs/supported.html) of LaTeX._
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This syntax also works for the Asciidoctor `:stem: latexmath`. For details, see
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the [Asciidoctor user manual](https://asciidoctor.org/docs/user-manual/#activating-stem-support).
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### Task lists
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[View this topic in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#task-lists).
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You can add task lists anywhere Markdown is supported.
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- In issues, merge requests, and comments, you can click to select the boxes.
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- In all other places, you cannot click to select the boxes. You must edit the Markdown manually
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by adding or removing an `x` in the brackets.
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To create a task list, follow the format of an ordered or unordered list:
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```markdown
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- [x] Completed task
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- [ ] Incomplete task
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- [ ] Sub-task 1
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- [x] Sub-task 2
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- [ ] Sub-task 3
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1. [x] Completed task
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1. [ ] Incomplete task
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1. [ ] Sub-task 1
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1. [x] Sub-task 2
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```
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### Table of contents
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A table of contents is an unordered list that links to subheadings in the document.
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To add a table of contents to a Markdown file, wiki page, issue request, or merge request
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description, add the `[[_TOC_]]` tag on its own line.
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```markdown
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This is an intro sentence to my Wiki page.
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[[_TOC_]]
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## My first heading
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First section content.
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## My second heading
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Second section content.
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```
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### Wiki-specific Markdown
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The following topics show how links inside wikis behave.
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#### Wiki - direct page link
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A direct page link includes the slug for a page that points to that page,
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at the base level of the wiki.
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This example links to a `documentation` page at the root of your wiki:
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```markdown
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[Link to Documentation](documentation)
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```
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#### Wiki - direct file link
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A direct file link points to a file extension for a file, relative to the current page.
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If the following example is on a page at `<your_wiki>/documentation/related`,
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it links to `<your_wiki>/documentation/file.md`:
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```markdown
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[Link to File](file.md)
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```
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#### Wiki - hierarchical link
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A hierarchical link can be constructed relative to the current wiki page by using `./<page>`,
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`../<page>`, and so on.
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If this example is on a page at `<your_wiki>/documentation/main`,
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it links to `<your_wiki>/documentation/related`:
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```markdown
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[Link to Related Page](related)
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```
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If this example is on a page at `<your_wiki>/documentation/related/content`,
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it links to `<your_wiki>/documentation/main`:
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```markdown
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[Link to Related Page](../main)
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```
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If this example is on a page at `<your_wiki>/documentation/main`,
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it links to `<your_wiki>/documentation/related.md`:
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```markdown
|
|
[Link to Related Page](related.md)
|
|
```
|
|
|
|
If this example is on a page at `<your_wiki>/documentation/related/content`,
|
|
it links to `<your_wiki>/documentation/main.md`:
|
|
|
|
```markdown
|
|
[Link to Related Page](../main.md)
|
|
```
|
|
|
|
#### Wiki - root link
|
|
|
|
A root link starts with a `/` and is relative to the wiki root.
|
|
|
|
This example links to `<wiki_root>/documentation`:
|
|
|
|
```markdown
|
|
[Link to Related Page](/documentation)
|
|
```
|
|
|
|
This example links to `<wiki_root>/miscellaneous.md`:
|
|
|
|
```markdown
|
|
[Link to Related Page](/miscellaneous.md)
|
|
```
|
|
|
|
## GitLab-specific references
|
|
|
|
GitLab Flavored Markdown renders GitLab-specific references. For example, you can reference
|
|
an issue, a commit, a team member, or even an entire project team. GitLab Flavored Markdown turns
|
|
that reference into a link so you can navigate between them.
|
|
|
|
Additionally, GitLab Flavored Markdown recognizes certain cross-project references and also has a shorthand
|
|
version to reference other projects from the same namespace.
|
|
|
|
GitLab Flavored Markdown recognizes the following:
|
|
|
|
| references | input | cross-project reference | shortcut inside same namespace |
|
|
| :------------------------------ | :------------------------- | :-------------------------------------- | :----------------------------- |
|
|
| specific user | `@user_name` | | |
|
|
| specific group | `@group_name` | | |
|
|
| entire team | `@all` | | |
|
|
| project | `namespace/project>` | | |
|
|
| issue | ``#123`` | `namespace/project#123` | `project#123` |
|
|
| merge request | `!123` | `namespace/project!123` | `project!123` |
|
|
| snippet | `$123` | `namespace/project$123` | `project$123` |
|
|
| epic **(ULTIMATE)** | `&123` | `group1/subgroup&123` | |
|
|
| vulnerability **(ULTIMATE)** (1)| `[vulnerability:123]` | `[vulnerability:namespace/project/123]` | `[vulnerability:project/123]` |
|
|
| feature flag | `[feature_flag:123]` | `[feature_flag:namespace/project/123]` | `[feature_flag:project/123]` |
|
|
| label by ID | `~123` | `namespace/project~123` | `project~123` |
|
|
| one-word label by name | `~bug` | `namespace/project~bug` | `project~bug` |
|
|
| multi-word label by name | `~"feature request"` | `namespace/project~"feature request"` | `project~"feature request"` |
|
|
| scoped label by name | `~"priority::high"` | `namespace/project~"priority::high"` | `project~"priority::high"` |
|
|
| project milestone by ID | `%123` | `namespace/project%123` | `project%123` |
|
|
| one-word milestone by name | `%v1.23` | `namespace/project%v1.23` | `project%v1.23` |
|
|
| multi-word milestone by name | `%"release candidate"` | `namespace/project%"release candidate"` | `project%"release candidate"` |
|
|
| specific commit | `9ba12248` | `namespace/project@9ba12248` | `project@9ba12248` |
|
|
| commit range comparison | `9ba12248...b19a04f5` | `namespace/project@9ba12248...b19a04f5` | `project@9ba12248...b19a04f5` |
|
|
| repository file references | `[README](doc/README.md)` | | |
|
|
| repository file line references | `[README](doc/README.md#L13)` | | |
|
|
| [alert](../operations/incident_management/alerts.md) | `^alert#123` | `namespace/project^alert#123` | `project^alert#123` |
|
|
|
|
1. [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/222483) in GitLab 13.7.
|
|
|
|
For example, referencing an issue by using `#123` formats the output as a link
|
|
to issue number 123 with text `#123`. Likewise, a link to issue number 123 is
|
|
recognized and formatted with text `#123`. If you don't want `#123` to link to an issue,
|
|
add a leading backslash `\#123`.
|
|
|
|
In addition to this, links to some objects are also recognized and formatted. Some examples of these are:
|
|
|
|
- Comments on issues: `"https://gitlab.com/gitlab-org/gitlab/-/issues/1234#note_101075757"`, which are rendered as `#1234 (comment 101075757)`
|
|
- The issues designs tab: `"https://gitlab.com/gitlab-org/gitlab/-/issues/1234/designs"`, which are rendered as `#1234 (designs)`.
|
|
- Links to individual designs: `"https://gitlab.com/gitlab-org/gitlab/-/issues/1234/designs/layout.png"`, which are rendered as `#1234[layout.png]`.
|
|
|
|
### Embedding metrics in GitLab Flavored Markdown
|
|
|
|
Metric charts can be embedded in GitLab Flavored Markdown. Read
|
|
[Embedding Metrics in GitLab flavored Markdown](../operations/metrics/embed.md) for more details.
|
|
|
|
## Features extended from standard Markdown
|
|
|
|
All standard Markdown formatting should work as expected in GitLab. Some standard
|
|
functionality is extended with additional features, without affecting the standard usage.
|
|
If a functionality is extended, the new option is listed as a sub-section.
|
|
|
|
### Blockquotes
|
|
|
|
Use a blockquote to highlight information, such as a side note. It's generated
|
|
by starting the lines of the blockquote with `>`:
|
|
|
|
```markdown
|
|
> Blockquotes help you emulate reply text.
|
|
> This line is part of the same quote.
|
|
|
|
Quote break.
|
|
|
|
> This is a very long line that is still quoted properly when it wraps. Keep writing to make sure this line is long enough to actually wrap for everyone. You can also *add* **Markdown** into a blockquote.
|
|
```
|
|
|
|
> Blockquotes help you emulate reply text.
|
|
> This line is part of the same quote.
|
|
|
|
Quote break.
|
|
|
|
> This is a very long line that is still quoted properly when it wraps. Keep writing to make sure this line is long enough to actually wrap for everyone. You can also *add* **Markdown** into a blockquote.
|
|
|
|
#### Multiline blockquote
|
|
|
|
If this section isn't rendered correctly, [view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#multiline-blockquote).
|
|
|
|
GitLab Flavored Markdown extends the standard Markdown by also supporting multi-line blockquotes
|
|
fenced by `>>>`:
|
|
|
|
```markdown
|
|
>>>
|
|
If you paste a message from somewhere else
|
|
|
|
that spans multiple lines,
|
|
|
|
you can quote that without having to manually prepend `>` to every line!
|
|
>>>
|
|
```
|
|
|
|
>>>
|
|
If you paste a message from somewhere else
|
|
|
|
that spans multiple lines,
|
|
|
|
you can quote that without having to manually prepend `>` to every line!
|
|
>>>
|
|
|
|
### Code spans and blocks
|
|
|
|
You can highlight anything that should be viewed as code and not standard text.
|
|
|
|
Inline code is highlighted with single backticks `` ` ``:
|
|
|
|
```markdown
|
|
Inline `code` has `back-ticks around` it.
|
|
```
|
|
|
|
Inline `code` has `back-ticks around` it.
|
|
|
|
---
|
|
|
|
To achieve a similar effect for a larger code example, you can:
|
|
|
|
- Fence an entire block of code with triple backticks (```` ``` ````).
|
|
- Fence an entire block of code with triple tildes (`~~~`).
|
|
- Indent it four or more spaces.
|
|
|
|
````markdown
|
|
```python
|
|
def function():
|
|
#indenting works just fine in the fenced code block
|
|
s = "Python code"
|
|
print s
|
|
```
|
|
|
|
Using 4 spaces
|
|
is like using
|
|
3-backtick fences.
|
|
````
|
|
|
|
```plaintext
|
|
~~~
|
|
Tildes are OK too.
|
|
~~~
|
|
```
|
|
|
|
The three examples above render as:
|
|
|
|
```python
|
|
def function():
|
|
#indenting works just fine in the fenced code block
|
|
s = "Python code"
|
|
print s
|
|
```
|
|
|
|
```plaintext
|
|
Using 4 spaces
|
|
is like using
|
|
3-backtick fences.
|
|
```
|
|
|
|
```plaintext
|
|
Tildes are OK too.
|
|
```
|
|
|
|
#### Colored code and syntax highlighting
|
|
|
|
If this section isn't rendered correctly,
|
|
[view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#colored-code-and-syntax-highlighting).
|
|
|
|
GitLab uses the [Rouge Ruby library](http://rouge.jneen.net/) for more colorful syntax
|
|
highlighting in code blocks. For a list of supported languages visit the
|
|
[Rouge project wiki](https://github.com/rouge-ruby/rouge/wiki/List-of-supported-languages-and-lexers).
|
|
Syntax highlighting is supported only in code blocks, so you can't highlight inline code.
|
|
|
|
To fence and apply syntax highlighting to a block of code, append the code language
|
|
to the opening code declaration, three back-ticks (```` ``` ````) or three tildes (`~~~`):
|
|
|
|
````markdown
|
|
```javascript
|
|
var s = "JavaScript syntax highlighting";
|
|
alert(s);
|
|
```
|
|
|
|
```python
|
|
def function():
|
|
#indenting works just fine in the fenced code block
|
|
s = "Python syntax highlighting"
|
|
print s
|
|
```
|
|
|
|
```ruby
|
|
require 'redcarpet'
|
|
markdown = Redcarpet.new("Hello World!")
|
|
puts markdown.to_html
|
|
```
|
|
|
|
```
|
|
No language indicated, so no syntax highlighting.
|
|
s = "There is no highlighting for this."
|
|
But let's throw in a <b>tag</b>.
|
|
```
|
|
````
|
|
|
|
The four examples above render as:
|
|
|
|
```javascript
|
|
var s = "JavaScript syntax highlighting";
|
|
alert(s);
|
|
```
|
|
|
|
```python
|
|
def function():
|
|
#indenting works just fine in the fenced code block
|
|
s = "Python syntax highlighting"
|
|
print s
|
|
```
|
|
|
|
```ruby
|
|
require 'redcarpet'
|
|
markdown = Redcarpet.new("Hello World!")
|
|
puts markdown.to_html
|
|
```
|
|
|
|
```plaintext
|
|
No language indicated, so no syntax highlighting.
|
|
s = "There is no highlighting for this."
|
|
But let's throw in a <b>tag</b>.
|
|
```
|
|
|
|
### Emphasis
|
|
|
|
There are multiple ways to emphasize text in Markdown. You can italicize, bold, strikethrough,
|
|
and combine these emphasis styles together.
|
|
Strikethrough is not part of the core Markdown standard, but is part of GitLab Flavored Markdown.
|
|
|
|
Examples:
|
|
|
|
```markdown
|
|
Emphasis, aka italics, with *asterisks* or _underscores_.
|
|
|
|
Strong emphasis, aka bold, with double **asterisks** or __underscores__.
|
|
|
|
Combined emphasis with **asterisks and _underscores_**.
|
|
|
|
Strikethrough uses two tildes. ~~Scratch this.~~
|
|
```
|
|
|
|
Emphasis, aka italics, with *asterisks* or _underscores_.
|
|
|
|
Strong emphasis, aka bold, with double **asterisks** or __underscores__.
|
|
|
|
Combined emphasis with **asterisks and _underscores_**.
|
|
|
|
Strikethrough uses two tildes. ~~Scratch this.~~
|
|
|
|
#### Multiple underscores in words and mid-word emphasis
|
|
|
|
If this section isn't rendered correctly,
|
|
[view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#multiple-underscores-in-words).
|
|
|
|
Avoid italicizing a portion of a word, especially when you're
|
|
dealing with code and names that often appear with multiple underscores.
|
|
GitLab Flavored Markdown extends the standard Markdown standard by ignoring multiple underlines in words,
|
|
to allow better rendering of Markdown documents discussing code:
|
|
|
|
```markdown
|
|
perform_complicated_task
|
|
|
|
do_this_and_do_that_and_another_thing
|
|
|
|
but_emphasis is_desired _here_
|
|
```
|
|
|
|
perform_complicated_task
|
|
|
|
do_this_and_do_that_and_another_thing
|
|
|
|
but_emphasis is_desired _here_
|
|
|
|
---
|
|
|
|
If you wish to emphasize only a part of a word, it can still be done with asterisks:
|
|
|
|
```markdown
|
|
perform*complicated*task
|
|
|
|
do*this*and*do*that*and*another thing
|
|
```
|
|
|
|
perform*complicated*task
|
|
|
|
do*this*and*do*that*and*another thing
|
|
|
|
### Footnotes
|
|
|
|
Footnotes add a link to a note that are rendered at the end of a Markdown file.
|
|
|
|
To make a footnote, you need both a reference tag and a separate line (anywhere in the file) with
|
|
the note content.
|
|
|
|
Regardless of the tag names, the relative order of the reference tags determines the rendered
|
|
numbering.
|
|
|
|
Reference tags can use letters and other characters. Avoid using lowercase `w` or an underscore
|
|
(`_`) in footnote tag names until [this bug](https://gitlab.com/gitlab-org/gitlab/-/issues/24423) is
|
|
resolved.
|
|
|
|
<!--
|
|
Do not edit the following codeblock. It uses HTML to skip the Vale ReferenceLinks test.
|
|
-->
|
|
|
|
<pre class="highlight"><code>A footnote reference tag looks like this: [^1]
|
|
|
|
This reference tag is a mix of letters and numbers. [^footnote-42]
|
|
|
|
[^1]: This is the text inside a footnote.
|
|
|
|
[^footnote-42]: This is another footnote.
|
|
</code></pre>
|
|
|
|
A footnote reference tag looks like this:[^1]
|
|
|
|
This reference tag is a mix of letters and numbers.[^footnote-42]
|
|
|
|
<!--
|
|
Do not delete the single space before the [^1] and [^footnotes] references below.
|
|
These are used to force the Vale ReferenceLinks check to skip these examples.
|
|
-->
|
|
|
|
[^1]: This is the text inside a footnote.
|
|
|
|
[^footnote-42]: This is another footnote.
|
|
|
|
### Headers
|
|
|
|
```markdown
|
|
# H1
|
|
## H2
|
|
### H3
|
|
#### H4
|
|
##### H5
|
|
###### H6
|
|
|
|
Alternatively, for H1 and H2, an underline-ish style:
|
|
|
|
Alt-H1
|
|
======
|
|
|
|
Alt-H2
|
|
------
|
|
```
|
|
|
|
#### Header IDs and links
|
|
|
|
GitLab Flavored Markdown extends the standard Markdown standard so that all Markdown-rendered headers automatically
|
|
get IDs, which can be linked to, except in comments.
|
|
|
|
On hover, a link to those IDs becomes visible to make it easier to copy the link to
|
|
the header to use it somewhere else.
|
|
|
|
The IDs are generated from the content of the header according to the following rules:
|
|
|
|
1. All text is converted to lowercase.
|
|
1. All non-word text (such as punctuation or HTML) is removed.
|
|
1. All spaces are converted to hyphens.
|
|
1. Two or more hyphens in a row are converted to one.
|
|
1. If a header with the same ID has already been generated, a unique
|
|
incrementing number is appended, starting at 1.
|
|
|
|
Example:
|
|
|
|
```markdown
|
|
# This header has spaces in it
|
|
## This header has a :thumbsup: in it
|
|
# This header has Unicode in it: 한글
|
|
## This header has spaces in it
|
|
### This header has spaces in it
|
|
## This header has 3.5 in it (and parentheses)
|
|
```
|
|
|
|
Would generate the following link IDs:
|
|
|
|
1. `this-header-has-spaces-in-it`
|
|
1. `this-header-has-a-in-it`
|
|
1. `this-header-has-unicode-in-it-한글`
|
|
1. `this-header-has-spaces-in-it-1`
|
|
1. `this-header-has-spaces-in-it-2`
|
|
1. `this-header-has-3-5-in-it-and-parentheses`
|
|
|
|
Note that the emoji processing happens before the header IDs are generated, so the
|
|
emoji is converted to an image which is then removed from the ID.
|
|
|
|
### Horizontal Rule
|
|
|
|
Create a horizontal rule by using three or more hyphens, asterisks, or underscores:
|
|
|
|
```markdown
|
|
Three or more hyphens,
|
|
|
|
---
|
|
|
|
asterisks,
|
|
|
|
***
|
|
|
|
or underscores
|
|
|
|
___
|
|
```
|
|
|
|
### Images
|
|
|
|
Examples:
|
|
|
|
<!--
|
|
Do not edit the following codeblock. It uses HTML to skip the Vale ReferenceLinks test.
|
|
-->
|
|
|
|
<pre class="highlight"><code>Inline-style (hover to see title text):
|
|
|
|
|
|
|
|
Reference-style (hover to see title text):
|
|
|
|
![alt text1][logo]
|
|
|
|
[logo]: img/markdown_logo.png "Title Text"
|
|
</code></pre>
|
|
|
|
<!--
|
|
DO NOT change the name of markdown_logo.png. This is used for a test in
|
|
spec/controllers/help_controller_spec.rb.
|
|
-->
|
|
|
|
Inline-style (hover to see title text):
|
|
|
|
|
|
|
|
Reference-style (hover to see title text):
|
|
|
|
<!--
|
|
The example below uses an in-line link to pass the Vale ReferenceLinks test.
|
|
Do not change to a reference style link.
|
|
-->
|
|
|
|
|
|
|
|
#### Videos
|
|
|
|
If this section isn't rendered correctly, [view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#videos).
|
|
|
|
Image tags that link to files with a video extension are automatically converted to
|
|
a video player. The valid video extensions are `.mp4`, `.m4v`, `.mov`, `.webm`, and `.ogv`:
|
|
|
|
```markdown
|
|
Here's a sample video:
|
|
|
|
|
|
```
|
|
|
|
Here's a sample video:
|
|
|
|
|
|
|
|
#### Audio
|
|
|
|
If this section isn't rendered correctly, [view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#audio).
|
|
|
|
Similar to videos, link tags for files with an audio extension are automatically converted to
|
|
an audio player. The valid audio extensions are `.mp3`, `.oga`, `.ogg`, `.spx`, and `.wav`:
|
|
|
|
```markdown
|
|
Here's a sample audio clip:
|
|
|
|
|
|
```
|
|
|
|
Here's a sample audio clip:
|
|
|
|
|
|
|
|
### Inline HTML
|
|
|
|
To see the second example of Markdown rendered in HTML,
|
|
[view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#inline-html).
|
|
|
|
You can also use raw HTML in your Markdown, and it usually works pretty well.
|
|
|
|
See the documentation for HTML::Pipeline's [SanitizationFilter](https://github.com/jch/html-pipeline/blob/v2.12.3/lib/html/pipeline/sanitization_filter.rb#L42)
|
|
class for the list of allowed HTML tags and attributes. In addition to the default
|
|
`SanitizationFilter` allowlist, GitLab allows `span`, `abbr`, `details` and `summary` elements.
|
|
|
|
```html
|
|
<dl>
|
|
<dt>Definition list</dt>
|
|
<dd>Is something people use sometimes.</dd>
|
|
|
|
<dt>Markdown in HTML</dt>
|
|
<dd>Does *not* work **very** well. HTML <em>tags</em> do <b>work</b>, in most cases.</dd>
|
|
</dl>
|
|
```
|
|
|
|
<dl>
|
|
<dt>Definition list</dt>
|
|
<dd>Is something people use sometimes.</dd>
|
|
|
|
<dt>Markdown in HTML</dt>
|
|
<dd>Does *not* work **very** well. HTML <em>tags</em> do <b>work</b>, in most cases.</dd>
|
|
</dl>
|
|
|
|
---
|
|
|
|
It's still possible to use Markdown inside HTML tags, but only if the lines containing Markdown
|
|
are separated into their own lines:
|
|
|
|
```html
|
|
<dl>
|
|
<dt>Markdown in HTML</dt>
|
|
<dd>Does *not* work **very** well. HTML tags work, in most cases.</dd>
|
|
|
|
<dt>Markdown in HTML</dt>
|
|
<dd>
|
|
|
|
Does *not* work **very** well. HTML tags work, in most cases.
|
|
|
|
</dd>
|
|
</dl>
|
|
```
|
|
|
|
<!--
|
|
The example below uses HTML to force correct rendering on docs.gitlab.com,
|
|
Markdown is fine in GitLab.
|
|
-->
|
|
|
|
<dl>
|
|
<dt>Markdown in HTML</dt>
|
|
<dd>Does *not* work **very** well. HTML tags work, in most cases.</dd>
|
|
|
|
<dt>Markdown in HTML</dt>
|
|
<dd>
|
|
|
|
Does <em>not</em> work <b>very</b> well. HTML tags work, in most cases.
|
|
|
|
</dd>
|
|
</dl>
|
|
|
|
#### Collapsible section
|
|
|
|
To see the second Markdown example rendered in HTML,
|
|
[view it in GitLab](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#details-and-summary).
|
|
|
|
Content can be collapsed using HTML's [`<details>`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/details)
|
|
and [`<summary>`](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/summary)
|
|
tags. For example, collapse a long log file so it takes up less screen space.
|
|
|
|
```html
|
|
<p>
|
|
<details>
|
|
<summary>Click this to collapse/fold.</summary>
|
|
|
|
These details <em>remain</em> <strong>hidden</strong> until expanded.
|
|
|
|
<pre><code>PASTE LOGS HERE</code></pre>
|
|
|
|
</details>
|
|
</p>
|
|
```
|
|
|
|
<p>
|
|
<details>
|
|
<summary>Click this to collapse/fold.</summary>
|
|
|
|
These details <em>remain</em> <strong>hidden</strong> until expanded.
|
|
|
|
<pre><code>PASTE LOGS HERE</code></pre>
|
|
|
|
</details>
|
|
</p>
|
|
|
|
---
|
|
|
|
Markdown inside these tags is also supported.
|
|
|
|
NOTE:
|
|
If your Markdown isn't rendering correctly, try adding
|
|
`{::options parse_block_html="true" /}` to the top of the page, and add
|
|
`markdown="span"` to the opening summary tag like this: `<summary markdown="span">`.
|
|
|
|
Remember to leave a blank line after the `</summary>` tag and before the `</details>` tag,
|
|
as shown in the example:
|
|
|
|
````html
|
|
<details>
|
|
<summary>Click this to collapse/fold.</summary>
|
|
|
|
These details _remain_ **hidden** until expanded.
|
|
|
|
```
|
|
PASTE LOGS HERE
|
|
```
|
|
|
|
</details>
|
|
````
|
|
|
|
<!--
|
|
The example below uses HTML to force correct rendering on docs.gitlab.com, Markdown
|
|
works correctly in GitLab.
|
|
-->
|
|
|
|
<details>
|
|
<summary>Click this to collapse/fold.</summary>
|
|
|
|
These details <em>remain</em> <b>hidden</b> until expanded.
|
|
|
|
<pre><code>PASTE LOGS HERE</code></pre>
|
|
|
|
</details>
|
|
|
|
### Line breaks
|
|
|
|
A line break is inserted (a new paragraph starts) if the previous text is
|
|
ended with two newlines, like when you hit <kbd>Enter</kbd> twice in a row. If you only
|
|
use one newline (hit <kbd>Enter</kbd> once), the next sentence remains part of the
|
|
same paragraph. Use this approach if you want to keep long lines from wrapping, and keep
|
|
them editable:
|
|
|
|
```markdown
|
|
Here's a line for us to start with.
|
|
|
|
This longer line is separated from the one above by two newlines, so it is a *separate paragraph*.
|
|
|
|
This line is also a separate paragraph, but...
|
|
These lines are only separated by single newlines,
|
|
so they *do not break* and just follow the previous lines
|
|
in the *same paragraph*.
|
|
```
|
|
|
|
Here's a line for us to start with.
|
|
|
|
This longer line is separated from the one above by two newlines, so it is a *separate paragraph*.
|
|
|
|
This line is also a separate paragraph, but...
|
|
These lines are only separated by single newlines,
|
|
so they *do not break* and just follow the previous lines
|
|
in the *same paragraph*.
|
|
|
|
#### Newlines
|
|
|
|
GitLab Flavored Markdown adheres to the Markdown specification in how [paragraphs and line breaks are handled](https://spec.commonmark.org/current/).
|
|
|
|
A paragraph is one or more consecutive lines of text, separated by one or
|
|
more blank lines (two newlines at the end of the first paragraph), as [explained above](#line-breaks).
|
|
|
|
Need more control over line breaks or soft returns? Add a single line break
|
|
by ending a line with a backslash, or two or more spaces. Two newlines in a row create a new
|
|
paragraph, with a blank line in between:
|
|
|
|
```markdown
|
|
First paragraph.
|
|
Another line in the same paragraph.
|
|
A third line in the same paragraph, but this time ending with two spaces.{space}{space}
|
|
A new line directly under the first paragraph.
|
|
|
|
Second paragraph.
|
|
Another line, this time ending with a backslash.\
|
|
A new line due to the previous backslash.
|
|
```
|
|
|
|
### Links
|
|
|
|
There are two ways to create links, inline-style and reference-style:
|
|
|
|
<!--
|
|
Do not edit the following codeblock. It uses HTML to skip the Vale ReferenceLinks test.
|
|
-->
|
|
|
|
<pre class="highlight"><code>- This is an [inline-style link](https://www.google.com)
|
|
- This is a [link to a repository file in the same directory](index.md)
|
|
- This is a [relative link to a readme one directory higher](../README.md)
|
|
- This is a [link that also has title text](https://www.google.com "This link takes you to Google!")
|
|
|
|
Using header ID anchors:
|
|
|
|
- This links to [a section on a different Markdown page, using a "#" and the header ID](index.md#overview)
|
|
- This links to [a different section on the same page, using a "#" and the header ID](#header-ids-and-links)
|
|
|
|
Using references:
|
|
|
|
- This is a [reference-style link, see below][Arbitrary case-insensitive reference text]
|
|
- You can [use numbers for reference-style link definitions, see below][1]
|
|
- Or leave it empty and use the [link text itself][], see below.
|
|
|
|
Some text to show that the reference links can follow later.
|
|
|
|
[arbitrary case-insensitive reference text]: https://www.mozilla.org/en-US/
|
|
[1]: https://slashdot.org
|
|
[link text itself]: https://www.reddit.com
|
|
</code></pre>
|
|
|
|
- This is an [inline-style link](https://www.google.com)
|
|
- This is a [link to a repository file in the same directory](index.md)
|
|
- This is a [relative link to a README one directory higher](../README.md)
|
|
- This is a [link that also has title text](https://www.google.com "This link takes you to Google!")
|
|
|
|
Using header ID anchors:
|
|
|
|
- This links to [a section on a different Markdown page, using a "#" and the header ID](index.md#overview)
|
|
- This links to [a different section on the same page, using a "#" and the header ID](#header-ids-and-links)
|
|
|
|
Using references:
|
|
|
|
<!--
|
|
The example below uses in-line links to pass the Vale ReferenceLinks test.
|
|
Do not change to reference style links.
|
|
-->
|
|
|
|
- This is a [reference-style link, see below](https://www.mozilla.org/en-US/)
|
|
- You can [use numbers for reference-style link definitions, see below](https://slashdot.org)
|
|
- Or leave it empty and use the [link text itself](https://www.reddit.com), see below.
|
|
|
|
Some text to show that the reference links can follow later.
|
|
|
|
NOTE:
|
|
Relative links do not allow the referencing of project files in a wiki
|
|
page, or a wiki page in a project file. The reason for this is that a wiki is always
|
|
in a separate Git repository in GitLab. For example, `[I'm a reference-style link](style)`
|
|
points the link to `wikis/style` only when the link is inside of a wiki Markdown file.
|
|
|
|
#### URL auto-linking
|
|
|
|
GitLab Flavored Markdown auto-links almost any URL you put into your text:
|
|
|
|
```markdown
|
|
- https://www.google.com
|
|
- https://www.google.com
|
|
- ftp://ftp.us.debian.org/debian/
|
|
- smb://foo/bar/baz
|
|
- irc://irc.freenode.net/
|
|
- http://localhost:3000
|
|
```
|
|
|
|
<!-- vale gitlab.Spelling = NO -->
|
|
|
|
- <https://www.google.com>
|
|
- <https://www.google.com>
|
|
- <ftp://ftp.us.debian.org/debian/>
|
|
- <smb://foo/bar/baz>
|
|
- <irc://irc.freenode.net/>
|
|
- <http://localhost:3000>
|
|
|
|
<!-- vale gitlab.Spelling = YES -->
|
|
### Lists
|
|
|
|
Ordered and unordered lists can be created.
|
|
|
|
For an ordered list, add the number you want the list
|
|
to start with, like `1.`, followed by a space, at the start of each line for ordered lists.
|
|
After the first number, it does not matter what number you use, ordered lists are
|
|
numbered automatically by vertical order, so repeating `1.` for all items in the
|
|
same list is common. If you start with a number other than `1.`, it uses that as the first
|
|
number, and count up from there.
|
|
|
|
Examples:
|
|
|
|
```markdown
|
|
1. First ordered list item
|
|
2. Another item
|
|
- Unordered sub-list.
|
|
1. Actual numbers don't matter, just that it's a number
|
|
1. Ordered sub-list
|
|
1. Next ordered sub-list item
|
|
4. And another item.
|
|
```
|
|
|
|
<!--
|
|
The "2." and "4." in the example above are changed to "1." below, to match the style
|
|
standards on docs.gitlab.com.
|
|
See https://docs.gitlab.com/ee/development/documentation/styleguide/index.html#lists
|
|
-->
|
|
|
|
1. First ordered list item
|
|
1. Another item
|
|
- Unordered sub-list.
|
|
1. Actual numbers don't matter, just that it's a number
|
|
1. Ordered sub-list
|
|
1. Next ordered sub-list item
|
|
1. And another item.
|
|
|
|
For an unordered list, add a `-`, `*` or `+`, followed by a space, at the start of
|
|
each line for unordered lists, but you should not use a mix of them.
|
|
|
|
```markdown
|
|
Unordered lists can:
|
|
|
|
- use
|
|
- minuses
|
|
|
|
They can also:
|
|
|
|
* use
|
|
* asterisks
|
|
|
|
They can even:
|
|
|
|
+ use
|
|
+ pluses
|
|
```
|
|
|
|
<!--
|
|
The "*" and "+" in the example above are changed to "-" below, to match the style
|
|
standards on docs.gitlab.com.
|
|
See https://docs.gitlab.com/ee/development/documentation/styleguide/index.html#lists
|
|
-->
|
|
|
|
Unordered lists can:
|
|
|
|
- use
|
|
- minuses
|
|
|
|
They can also:
|
|
|
|
- use
|
|
- asterisks
|
|
|
|
They can even:
|
|
|
|
- use
|
|
- pluses
|
|
|
|
---
|
|
|
|
If a list item contains multiple paragraphs, each subsequent paragraph should be indented
|
|
to the same level as the start of the list item text.
|
|
|
|
Example:
|
|
|
|
```markdown
|
|
1. First ordered list item
|
|
|
|
Second paragraph of first item.
|
|
|
|
1. Another item
|
|
```
|
|
|
|
1. First ordered list item
|
|
|
|
Second paragraph of first item.
|
|
|
|
1. Another item
|
|
|
|
---
|
|
|
|
If the paragraph of the first item is not indented with the proper number of spaces,
|
|
the paragraph appears outside the list, instead of properly indented under the list item.
|
|
|
|
Example:
|
|
|
|
```markdown
|
|
1. First ordered list item
|
|
|
|
Paragraph of first item.
|
|
|
|
1. Another item
|
|
```
|
|
|
|
1. First ordered list item
|
|
|
|
Paragraph of first item.
|
|
|
|
1. Another item
|
|
|
|
### Superscripts / Subscripts
|
|
|
|
CommonMark and GitLab Flavored Markdown don't support the Redcarpet superscript syntax ( `x^2` ).
|
|
Use the standard HTML syntax for superscripts and subscripts:
|
|
|
|
```html
|
|
The formula for water is H<sub>2</sub>O
|
|
while the equation for the theory of relativity is E = mc<sup>2</sup>.
|
|
```
|
|
|
|
<!-- vale gitlab.Spelling = NO -->
|
|
|
|
The formula for water is H<sub>2</sub>O
|
|
while the equation for the theory of relativity is E = mc<sup>2</sup>.
|
|
|
|
<!-- vale gitlab.Spelling = YES -->
|
|
|
|
### Tables
|
|
|
|
Tables are not part of the core Markdown spec, but they are part of GitLab Flavored Markdown.
|
|
|
|
1. The first line contains the headers, separated by "pipes" (`|`).
|
|
1. The second line separates the headers from the cells.
|
|
- The cells can contain only empty spaces, hyphens, and
|
|
(optionally) colons for horizontal alignment.
|
|
- Each cell must contain at least one hyphen, but adding more hyphens to a
|
|
cell does not change the cell's rendering.
|
|
- Any content other than hyphens, whitespace, or colons is not allowed
|
|
1. The third, and any following lines, contain the cell values.
|
|
- You **can't** have cells separated over many lines in the Markdown, they must be kept to single lines,
|
|
but they can be very long. You can also include HTML `<br>` tags to force newlines if needed.
|
|
- The cell sizes **don't** have to match each other. They are flexible, but must be separated
|
|
by pipes (`|`).
|
|
- You **can** have blank cells.
|
|
1. Column widths are calculated dynamically based on the content of the cells.
|
|
|
|
Example:
|
|
|
|
```markdown
|
|
| header 1 | header 2 | header 3 |
|
|
| --- | --- | --- |
|
|
| cell 1 | cell 2 | cell 3 |
|
|
| cell 4 | cell 5 is longer | cell 6 is much longer than the others, but that's ok. It eventually wraps the text when the cell is too large for the display size. |
|
|
| cell 7 | | cell 9 |
|
|
```
|
|
|
|
| header 1 | header 2 | header 3 |
|
|
| --- | --- | --- |
|
|
| cell 1 | cell 2 | cell 3 |
|
|
| cell 4 | cell 5 is longer | cell 6 is much longer than the others, but that's ok. It eventually wraps the text when the cell is too large for the display size. |
|
|
| cell 7 | | cell 9 |
|
|
|
|
Additionally, you can choose the alignment of text in columns by adding colons (`:`)
|
|
to the sides of the "dash" lines in the second row. This affects every cell in the column:
|
|
|
|
```markdown
|
|
| Left Aligned | Centered | Right Aligned |
|
|
| :--- | :---: | ---: |
|
|
| Cell 1 | Cell 2 | Cell 3 |
|
|
| Cell 4 | Cell 5 | Cell 6 |
|
|
```
|
|
|
|
| Left Aligned | Centered | Right Aligned |
|
|
| :--- | :---: | ---: |
|
|
| Cell 1 | Cell 2 | Cell 3 |
|
|
| Cell 4 | Cell 5 | Cell 6 |
|
|
|
|
[In GitLab itself](https://gitlab.com/gitlab-org/gitlab/-/blob/master/doc/user/markdown.md#tables),
|
|
the headers are always left-aligned in Chrome and Firefox, and centered in Safari.
|
|
|
|
You can use HTML formatting to adjust the rendering of tables. For example, you can
|
|
use `<br>` tags to force a cell to have multiple lines:
|
|
|
|
```markdown
|
|
| Name | Details |
|
|
| --- | --- |
|
|
| Item1 | This is on one line |
|
|
| Item2 | This item has:<br>- Multiple items<br>- That we want listed separately |
|
|
```
|
|
|
|
| Name | Details |
|
|
| --- | --- |
|
|
| Item1 | This is on one line |
|
|
| Item2 | This item has:<br>- Multiple items<br>- That we want listed separately |
|
|
|
|
You can use HTML formatting in GitLab itself to add [task lists](#task-lists) with checkboxes,
|
|
but they do not render properly on `docs.gitlab.com`:
|
|
|
|
```markdown
|
|
| header 1 | header 2 |
|
|
| --- | --- |
|
|
| cell 1 | cell 2 |
|
|
| cell 3 | <ul><li> - [ ] Task one </li><li> - [ ] Task two </li></ul> |
|
|
```
|
|
|
|
#### Copy from spreadsheet and paste in Markdown
|
|
|
|
[Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/27205) in GitLab 12.7.
|
|
|
|
If you're working in spreadsheet software (for example, Microsoft Excel, Google
|
|
Sheets, or Apple Numbers), GitLab creates a Markdown table when you copy-and-paste
|
|
from a spreadsheet. For example, suppose you have the
|
|
following spreadsheet:
|
|
|
|
|
|
|
|
Select the cells and copy them to your clipboard. Open a GitLab Markdown
|
|
entry and paste the spreadsheet:
|
|
|
|
|
|
|
|
## References
|
|
|
|
- This document leveraged heavily from the [Markdown-Cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet).
|
|
- The original [Markdown Syntax Guide](https://daringfireball.net/projects/markdown/syntax)
|
|
at Daring Fireball is an excellent resource for a detailed explanation of standard Markdown.
|
|
- You can find the detailed specification for CommonMark in the [CommonMark Spec](https://spec.commonmark.org/current/).
|
|
- The [CommonMark Dingus](https://spec.commonmark.org/dingus/) helps you test CommonMark syntax.
|
|
|
|
## Transition from Redcarpet to CommonMark
|
|
|
|
- In GitLab 11.8, the [Redcarpet Ruby library](https://github.com/vmg/redcarpet)
|
|
was removed. All issues and comments, including those in 11.1 and earlier, are now processed
|
|
by using the [CommonMark Ruby Library](https://github.com/gjtorikian/commonmarker).
|
|
- In GitLab 11.3 and later, CommonMark processes wiki pages and Markdown
|
|
files (`*.md`) in repositories.
|
|
- In GitLab 11.1 and later, the [CommonMark Ruby Library](https://github.com/gjtorikian/commonmarker)
|
|
for Markdown processes all new issues, merge requests, comments, and other Markdown
|
|
content.
|
|
|
|
The documentation website migrated its Markdown engine
|
|
[from Redcarpet to Kramdown](https://gitlab.com/gitlab-org/gitlab-docs/-/merge_requests/108)
|
|
in October 2018.
|
|
|
|
You may have older issues, merge requests, or Markdown documents in your
|
|
repository that relied upon nuances of the GitLab RedCarpet version
|
|
of Markdown. Because CommonMark uses slightly stricter syntax, these documents
|
|
may now appear differently after the transition to CommonMark.
|
|
|
|
For example, numbered lists with nested lists may
|
|
render incorrectly:
|
|
|
|
```markdown
|
|
1. Chocolate
|
|
- dark
|
|
- milk
|
|
```
|
|
|
|
To fix this issue, add a space to each nested item. The `-` must be aligned with the first
|
|
character of the top list item (`C` in this case):
|
|
|
|
```markdown
|
|
1. Chocolate
|
|
- dark
|
|
- milk
|
|
```
|
|
|
|
1. Chocolate
|
|
- dark
|
|
- milk
|
|
|
|
We flag any significant differences between Redcarpet and CommonMark Markdown in this document.
|
|
|
|
If you have many Markdown files, it can be tedious to determine
|
|
if they display correctly or not. You can use the
|
|
[`diff_redcarpet_cmark`](https://gitlab.com/digitalmoksha/diff_redcarpet_cmark)
|
|
tool to generate a list of files and the
|
|
differences between how RedCarpet and CommonMark render the files. It indicates
|
|
if any changes are needed.
|
|
|
|
`diff_redcarpet_cmark` is not an officially supported product.
|