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243 lines
7 KiB
Markdown
243 lines
7 KiB
Markdown
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description = "Generation of diagram and flowchart from text in a similar manner as Markdown"
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title = "Mermaid"
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[Mermaid](https://mermaidjs.github.io/) is a library helping you to generate diagram and flowcharts from text, in a similar manner as Markdown.
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{{% notice note %}}
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This only works in modern browsers.
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{{% /notice %}}
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{{% notice warning %}}
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Due to limitations with [Mermaid](https://github.com/mermaid-js/mermaid/issues/1846), it is currently not possible to use Mermaid code fences in an initially collapsed `expand` shortcode. This is a know issue and [can't be fixed by this theme](https://github.com/McShelby/hugo-theme-relearn/issues/187).
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{{% /notice %}}
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## Usage
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Just insert your Mermaid code in the `mermaid` shortcode like this:
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````go
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{{</* mermaid [ align=("left"|"right"|"center"|"justify") ] */>}}
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classDiagram
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Person *-- Dog
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{{</* /mermaid */>}}
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````
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You can set an optional `align` attribute which defaults to `"center"`.
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If you don't need alignment you can use the alternative syntax using code fences if you have turned off `guessSyntax` for the `markup.highlight` setting (see below):
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````plaintext
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```mermaid
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classDiagram
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Person *-- Dog
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```
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````
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The generated graphs can be be panned by dragging them and zoomed by using the mousewheel. On mobile devices you can use finger gestures.
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## Examples
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### Flowchart
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{{< mermaid align="left" >}}
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%%{init:{"theme":"forest"}}%%
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graph LR;
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A[Hard edge] -->|Link text| B(Round edge)
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B --> C{<strong>Decision</strong>}
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C -->|One| D[Result one]
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C -->|Two| E[Result two]
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{{< /mermaid >}}
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{{% expand "Show markup" "true" %}}
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````go
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{{</* mermaid align="left" */>}}
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%%{init:{"theme":"forest"}}%%
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graph LR;
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A[Hard edge] -->|Link text| B(Round edge)
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B --> C{<strong>Decision</strong>}
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C -->|One| D[Result one]
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C -->|Two| E[Result two]
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{{</* /mermaid */>}}
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````
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{{% /expand %}}
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### Sequence
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{{< mermaid >}}
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sequenceDiagram
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participant Alice
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participant Bob
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Alice->>John: Hello John, how are you?
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loop Healthcheck
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John->John: Fight against hypochondria
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end
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Note right of John: Rational thoughts <br/>prevail...
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John-->Alice: Great!
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John->Bob: How about you?
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Bob-->John: Jolly good!
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{{< /mermaid >}}
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{{% expand "Show markup" "true" %}}
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````go
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{{</* mermaid */>}}
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sequenceDiagram
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participant Alice
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participant Bob
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Alice->>John: Hello John, how are you?
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loop Healthcheck
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John->John: Fight against hypochondria
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end
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Note right of John: Rational thoughts <br/>prevail...
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John-->Alice: Great!
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John->Bob: How about you?
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Bob-->John: Jolly good!
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{{</* /mermaid */>}}
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````
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{{% /expand %}}
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### GANTT
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{{< mermaid >}}
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gantt
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dateFormat YYYY-MM-DD
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title Adding GANTT diagram functionality to Mermaid
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section A section
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Completed task :done, des1, 2014-01-06,2014-01-08
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Active task :active, des2, 2014-01-09, 3d
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Future task : des3, after des2, 5d
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Future task2 : des4, after des3, 5d
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section Critical tasks
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Completed task in the critical line :crit, done, 2014-01-06,24h
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Implement parser and jison :crit, done, after des1, 2d
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Create tests for parser :crit, active, 3d
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Future task in critical line :crit, 5d
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Create tests for renderer :2d
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Add to Mermaid :1d
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{{< /mermaid >}}
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{{% expand "Show markup" "true" %}}
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````go
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{{</* mermaid */>}}
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gantt
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dateFormat YYYY-MM-DD
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title Adding GANTT diagram functionality to Mermaid
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section A section
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Completed task :done, des1, 2014-01-06,2014-01-08
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Active task :active, des2, 2014-01-09, 3d
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Future task : des3, after des2, 5d
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Future task2 : des4, after des3, 5d
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section Critical tasks
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Completed task in the critical line :crit, done, 2014-01-06,24h
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Implement parser and jison :crit, done, after des1, 2d
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Create tests for parser :crit, active, 3d
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Future task in critical line :crit, 5d
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Create tests for renderer :2d
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Add to Mermaid :1d
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{{</* /mermaid */>}}
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````
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{{% /expand %}}
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### Class
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{{< mermaid >}}
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classDiagram
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Class01 <|-- AveryLongClass : Cool
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Class03 *-- Class04
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Class05 o-- Class06
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Class07 .. Class08
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Class09 --> C2 : Where am i?
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Class09 --* C3
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Class09 --|> Class07
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Class07 : equals()
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Class07 : Object[] elementData
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Class01 : size()
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Class01 : int chimp
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Class01 : int gorilla
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Class08 <--> C2: Cool label
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{{< /mermaid >}}
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{{% expand "Show markup" "true" %}}
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````go
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{{</* mermaid */>}}
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classDiagram
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Class01 <|-- AveryLongClass : Cool
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Class03 *-- Class04
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Class05 o-- Class06
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Class07 .. Class08
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Class09 --> C2 : Where am i?
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Class09 --* C3
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Class09 --|> Class07
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Class07 : equals()
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Class07 : Object[] elementData
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Class01 : size()
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Class01 : int chimp
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Class01 : int gorilla
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Class08 <--> C2: Cool label
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{{</* /mermaid */>}}
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````
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{{% /expand %}}
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### State
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````mermaid
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stateDiagram-v2
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open: Open Door
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closed: Closed Door
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locked: Locked Door
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open --> closed: Close
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closed --> locked: Lock
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locked --> closed: Unlock
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closed --> open: Open
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````
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{{% expand "Show markup" "true" %}}
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````go
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```mermaid
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stateDiagram-v2
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open: Open Door
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closed: Closed Door
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locked: Locked Door
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open --> closed: Close
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closed --> locked: Lock
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locked --> closed: Unlock
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closed --> open: Open
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```
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````
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{{% /expand %}}
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## Configuration
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Mermaid is configured with default settings. You can customize Mermaid's default settings for all of your files thru a JSON object in your `config.toml`, override these settings per page thru your pages frontmatter or override these setting per diagramm thru [diagram directives](https://mermaid-js.github.io/mermaid/#/directives?id=directives).
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The JSON object of your `config.toml` / frontmatter is forwarded into Mermaid's `mermaid.initialize()` function.
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See [Mermaid documentation](http://mermaid-js.github.io/mermaid/#/Setup?id=mermaidapi-configuration-defaults) for all allowed settings.
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The `theme` setting can also be set by your used color variant. This will be the sitewide default and can - again - be overridden by your settings in `config.toml`, frontmatter or diagram directives.
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{{% notice note %}}
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If you want to use mermaid codefences, you have to turn off `guessSyntax` for the `markup.highlight` setting.
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{{% /notice %}}
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### Example
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````toml
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[params]
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mermaidInitialize = "{ \"theme\": \"dark\" }"
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[markup]
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[markup.highlight]
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# if set to `guessSyntax = true`, there will be no unstyled code even if no language
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# was given BUT mermaid code fences will not work anymore! So this is a mandatory
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# setting for your site
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guessSyntax = false
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````
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or pages frontmatter
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````toml
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+++
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mermaidInitialize = "{ \"theme\": \"dark\" }"
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+++
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````
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