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categories = ["howto", "reference"]
description = "Generate diagrams and flowcharts from text"
frontmatter = ["customMermaidURL", "mermaid.force", "mermaidInitialize", "mermaidZoom"]
options = ["customMermaidURL", "mermaid.force", "mermaidInitialize", "mermaidZoom"]
title = "Mermaid"
+++
The `mermaid` shortcode generates diagrams and flowcharts from text in a similar manner as Markdown using the [Mermaid](https://mermaidjs.github.io/) library.
````mermaid {align="center" zoom="true"}
graph LR;
If --> Then
Then --> Else
````
## Usage
{{< tabs groupid="shortcode-parameter">}}
{{% tab title="codefence" %}}
````md
```mermaid {align="center" zoom="true"}
graph LR;
If --> Then
Then --> Else
```
````
{{% /tab %}}
{{% tab title="shortcode" %}}
````go
{{</* mermaid align="center" zoom="true" */>}}
graph LR;
If --> Then
Then --> Else
{{</* /mermaid */>}}
````
{{% /tab %}}
{{% tab title="partial" %}}
````go
{{ partial "shortcodes/mermaid.html" (dict
"page" .
"content" "graph LR;\n If --> Then\n Then --> Else"
"align" "center"
"zoom" "true"
)}}
````
{{% /tab %}}
{{< /tabs >}}
Codefence syntax is widely available in other Markdown parsers like GitHub and therefore is the recommend syntax for generating portable Markdown.
### Parameter
| Name | Default | Notes |
|-----------------------|------------------|-------------|
| **align** | `center` | The vertical alignment.<br><br>Allowed values are `left`, `center` or `right`. |
| **zoom** | see notes | Whether the graph is pan- and zoomable.<br><br>If not set the value is determined by the [`mermaidZoom` setting](#configuring-pan-and-zoom) of your configurations options or the pages front matter or `false` if not set at all.<br><br>- `false`: no pan or zoom<br>- `true`: pan and zoom active |
| _**&lt;content&gt;**_ | _&lt;empty&gt;_ | Your Mermaid graph. |
## Settings
### Configuring Pan and Zoom
{{% badge style="cyan" icon="gears" title=" " %}}Option{{% /badge %}} {{% badge style="green" icon="fa-fw fab fa-markdown" title=" " %}}Front Matter{{% /badge %}} The generated graphs can be panned by dragging them and zoomed by using the mousewheel. On mobile devices you can use finger gestures.
By default this is disabled. Set `mermaidZoom=true` to enable it.
Individual settings of a graphs [`zoom` parameter](#parameter) have precedence over the page's front matter and configuration options in that order.
{{< multiconfig >}}
mermaidZoom = true
{{< /multiconfig >}}
### Providing Initialization Options for the Mermaid Library
{{% badge style="cyan" icon="gears" title=" " %}}Option{{% /badge %}} {{% badge style="green" icon="fa-fw fab fa-markdown" title=" " %}}Front Matter{{% /badge %}} The Mermaid library is configured with default settings for initialization.
You can overwrite the settings by providing a JSON object in `mermaidInitialize`. See [Mermaid's documentation](https://mermaid-js.github.io/mermaid/#/Setup?id=mermaidapi-configuration-defaults) for all allowed settings.
> [!NOTE]
> Using the `theme` setting in the initialization options is unsupported. To set the theme globally edit the `--MERMAID-theme` variable of your [color variant](configuration/branding/colors/#modifying-variants).
Keep in mind that initialization settings of your pages front matter overwrite all settings of your configuration options.
In addition, you can merge settings for each individual graph through [diagram directives](https://mermaid-js.github.io/mermaid/#/directives?id=directives) on top of the settings of your page's front matter or configuration options.
{{< multiconfig >}}
mermaidInitialize = '{ "securityLevel": "loose" }'
{{< /multiconfig >}}
### Loading an External Version of the Mermaid Library
{{% badge style="cyan" icon="gears" title=" " %}}Option{{% /badge %}} {{% badge style="green" icon="fa-fw fab fa-markdown" title=" " %}}Front Matter{{% /badge %}} The theme uses the shipped Mermaid library by default.
In case you want do use a different version of the Mermaid library but don't want to override the shipped version, you can set `customMermaidURL` to the URL of the external Mermaid library.
{{< multiconfig >}}
customMermaidURL = 'https://unpkg.com/mermaid/dist/mermaid.min.js'
{{< /multiconfig >}}
### Force Loading of the Mermaid Library
{{% badge style="cyan" icon="gears" title=" " %}}Option{{% /badge %}} {{% badge style="green" icon="fa-fw fab fa-markdown" title=" " %}}Front Matter{{% /badge %}} The Mermaid library will be loaded if the page contains an `mermaid` shortcode or codefence.
You can force loading the Mermaid library if no shortcode or codefence was used by setting `mermaid.force=true`. If a shortcode or codefence was found, this option has no effect. This comes handy in case you are using scripting to render a graph.
{{< multiconfig >}}
mermaid.force = true
{{< /multiconfig >}}
### Setting a Specific Mermaid Theme
While you can configure the Mermaid theme to render your graph by using one of the [initialization options](#providing-initialization-options-for-the-mermaid-library), the recommended way is to set the default value using the `--MERMAID-theme` variable in your [color variant stylesheet](configuration/branding/generator). This allows your graphs to look pretty when the user switches the color variant.
## Examples
### Flowchart with YAML-Title
````md
```mermaid
---
title: Example Diagram
---
graph LR;
A[Hard edge] -->|Link text| B(Round edge)
B --> C{<strong>Decision</strong>}
C -->|One| D[Result one]
C -->|Two| E[Result two]
```
````
````mermaid
---
title: Example Diagram
---
graph LR;
A[Hard edge] -->|Link text| B(Round edge)
B --> C{<strong>Decision</strong>}
C -->|One| D[Result one]
C -->|Two| E[Result two]
````
### Sequence Diagram with Configuration Directive
````md
```mermaid
%%{init:{"fontFamily":"monospace", "sequence":{"showSequenceNumbers":true}}}%%
sequenceDiagram
Alice->>John: Hello John, how are you?
loop Healthcheck
John->>John: Fight against hypochondria
end
Note right of John: Rational thoughts!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
```
````
````mermaid
%%{init:{"fontFamily":"monospace", "sequence":{"showSequenceNumbers":true}}}%%
sequenceDiagram
Alice->>John: Hello John, how are you?
loop Healthcheck
John->>John: Fight against hypochondria
end
Note right of John: Rational thoughts!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
````
### Class Diagram
````md
```mermaid
classDiagram
Animal <|-- Duck
Animal <|-- Fish
Animal <|-- Zebra
Animal : +int age
Animal : +String gender
Animal: +isMammal()
Animal: +mate()
class Duck{
+String beakColor
+swim()
+quack()
}
class Fish{
-int sizeInFeet
-canEat()
}
class Zebra{
+bool is_wild
+run()
}
```
````
````mermaid
classDiagram
Animal <|-- Duck
Animal <|-- Fish
Animal <|-- Zebra
Animal : +int age
Animal : +String gender
Animal: +isMammal()
Animal: +mate()
class Duck{
+String beakColor
+swim()
+quack()
}
class Fish{
-int sizeInFeet
-canEat()
}
class Zebra{
+bool is_wild
+run()
}
````
### State Diagram Aligned to the Right Using Shortcode Syntax
````go
{{</* mermaid align="right" */>}}
stateDiagram-v2
open: Open Door
closed: Closed Door
locked: Locked Door
open --> closed: Close
closed --> locked: Lock
locked --> closed: Unlock
closed --> open: Open
{{</* /mermaid */>}}
````
{{< mermaid align="right" >}}
stateDiagram-v2
open: Open Door
closed: Closed Door
locked: Locked Door
open --> closed: Close
closed --> locked: Lock
locked --> closed: Unlock
closed --> open: Open
{{< /mermaid >}}
### Entity Relationship Model with Non-Default Mermaid Theme
````md
```mermaid
%%{init:{"theme":"forest"}}%%
erDiagram
CUSTOMER }|..|{ DELIVERY-ADDRESS : has
CUSTOMER ||--o{ ORDER : places
CUSTOMER ||--o{ INVOICE : "liable for"
DELIVERY-ADDRESS ||--o{ ORDER : receives
INVOICE ||--|{ ORDER : covers
ORDER ||--|{ ORDER-ITEM : includes
PRODUCT-CATEGORY ||--|{ PRODUCT : contains
PRODUCT ||--o{ ORDER-ITEM : "ordered in"
```
````
````mermaid
%%{init:{"theme":"forest"}}%%
erDiagram
CUSTOMER }|..|{ DELIVERY-ADDRESS : has
CUSTOMER ||--o{ ORDER : places
CUSTOMER ||--o{ INVOICE : "liable for"
DELIVERY-ADDRESS ||--o{ ORDER : receives
INVOICE ||--|{ ORDER : covers
ORDER ||--|{ ORDER-ITEM : includes
PRODUCT-CATEGORY ||--|{ PRODUCT : contains
PRODUCT ||--o{ ORDER-ITEM : "ordered in"
````
### User Journey
````md
```mermaid
journey
title My working day
section Go to work
Make tea: 5: Me
Go upstairs: 3: Me
Do work: 1: Me, Cat
section Go home
Go downstairs: 5: Me
Sit down: 3: Me
```
````
````mermaid
journey
title My working day
section Go to work
Make tea: 5: Me
Go upstairs: 3: Me
Do work: 1: Me, Cat
section Go home
Go downstairs: 5: Me
Sit down: 3: Me
````
### GANTT Chart
````md
```mermaid
gantt
dateFormat YYYY-MM-DD
title Adding GANTT diagram functionality to Mermaid
section A section
Completed task :done, des1, 2014-01-06,2014-01-08
Active task :active, des2, 2014-01-09, 3d
Future task : des3, after des2, 5d
Future task2 : des4, after des3, 5d
section Critical tasks
Completed task in the critical line :crit, done, 2014-01-06,24h
Implement parser and jison :crit, done, after des1, 2d
Create tests for parser :crit, active, 3d
Future task in critical line :crit, 5d
Create tests for renderer :2d
Add to Mermaid :1d
```
````
````mermaid
gantt
dateFormat YYYY-MM-DD
title Adding GANTT diagram functionality to Mermaid
section A section
Completed task :done, des1, 2014-01-06,2014-01-08
Active task :active, des2, 2014-01-09, 3d
Future task : des3, after des2, 5d
Future task2 : des4, after des3, 5d
section Critical tasks
Completed task in the critical line :crit, done, 2014-01-06,24h
Implement parser and jison :crit, done, after des1, 2d
Create tests for parser :crit, active, 3d
Future task in critical line :crit, 5d
Create tests for renderer :2d
Add to Mermaid :1d
````
### Pie Chart without Zoom
````md
```mermaid {zoom="false"}
pie title Pets adopted by volunteers
"Dogs" : 386
"Cats" : 85
"Rats" : 15
```
````
````mermaid {zoom="false"}
pie title Pets adopted by volunteers
"Dogs" : 386
"Cats" : 85
"Rats" : 15
````
### Quadrant Chart
````md
```mermaid
quadrantChart
title Reach and engagement of campaigns
x-axis Low Reach --> High Reach
y-axis Low Engagement --> High Engagement
quadrant-1 We should expand
quadrant-2 Need to promote
quadrant-3 Re-evaluate
quadrant-4 May be improved
Campaign A: [0.3, 0.6]
Campaign B: [0.45, 0.23]
Campaign C: [0.57, 0.69]
Campaign D: [0.78, 0.34]
Campaign E: [0.40, 0.34]
Campaign F: [0.35, 0.78]
```
````
````mermaid
quadrantChart
title Reach and engagement of campaigns
x-axis Low Reach --> High Reach
y-axis Low Engagement --> High Engagement
quadrant-1 We should expand
quadrant-2 Need to promote
quadrant-3 Re-evaluate
quadrant-4 May be improved
Campaign A: [0.3, 0.6]
Campaign B: [0.45, 0.23]
Campaign C: [0.57, 0.69]
Campaign D: [0.78, 0.34]
Campaign E: [0.40, 0.34]
Campaign F: [0.35, 0.78]
````
### Requirement Diagram
````md
```mermaid
requirementDiagram
requirement test_req {
id: 1
text: the test text.
risk: high
verifymethod: test
}
element test_entity {
type: simulation
}
test_entity - satisfies -> test_req
```
````
````mermaid
requirementDiagram
requirement test_req {
id: 1
text: the test text.
risk: high
verifymethod: test
}
element test_entity {
type: simulation
}
test_entity - satisfies -> test_req
````
### Git Graph
````md
```mermaid
gitGraph
commit
commit
branch develop
checkout develop
commit
commit
checkout main
merge develop
commit
commit
```
````
````mermaid
gitGraph
commit
commit
branch develop
checkout develop
commit
commit
checkout main
merge develop
commit
commit
````
### C4 Diagrams
````md
```mermaid
C4Context
title System Context diagram for Internet Banking System
Enterprise_Boundary(b0, "BankBoundary0") {
Person(customerA, "Banking Customer A", "A customer of the bank, with personal bank accounts.")
Person(customerB, "Banking Customer B")
Person_Ext(customerC, "Banking Customer C", "desc")
Person(customerD, "Banking Customer D", "A customer of the bank, <br/> with personal bank accounts.")
System(SystemAA, "Internet Banking System", "Allows customers to view information about their bank accounts, and make payments.")
Enterprise_Boundary(b1, "BankBoundary") {
SystemDb_Ext(SystemE, "Mainframe Banking System", "Stores all of the core banking information about customers, accounts, transactions, etc.")
System_Boundary(b2, "BankBoundary2") {
System(SystemA, "Banking System A")
System(SystemB, "Banking System B", "A system of the bank, with personal bank accounts. next line.")
}
System_Ext(SystemC, "E-mail system", "The internal Microsoft Exchange e-mail system.")
SystemDb(SystemD, "Banking System D Database", "A system of the bank, with personal bank accounts.")
Boundary(b3, "BankBoundary3", "boundary") {
SystemQueue(SystemF, "Banking System F Queue", "A system of the bank.")
SystemQueue_Ext(SystemG, "Banking System G Queue", "A system of the bank, with personal bank accounts.")
}
}
}
BiRel(customerA, SystemAA, "Uses")
BiRel(SystemAA, SystemE, "Uses")
Rel(SystemAA, SystemC, "Sends e-mails", "SMTP")
Rel(SystemC, customerA, "Sends e-mails to")
UpdateElementStyle(customerA, $fontColor="red", $bgColor="grey", $borderColor="red")
UpdateRelStyle(customerA, SystemAA, $textColor="blue", $lineColor="blue", $offsetX="5")
UpdateRelStyle(SystemAA, SystemE, $textColor="blue", $lineColor="blue", $offsetY="-10")
UpdateRelStyle(SystemAA, SystemC, $textColor="blue", $lineColor="blue", $offsetY="-40", $offsetX="-50")
UpdateRelStyle(SystemC, customerA, $textColor="red", $lineColor="red", $offsetX="-50", $offsetY="20")
UpdateLayoutConfig($c4ShapeInRow="3", $c4BoundaryInRow="1")
```
````
````mermaid
C4Context
title System Context diagram for Internet Banking System
Enterprise_Boundary(b0, "BankBoundary0") {
Person(customerA, "Banking Customer A", "A customer of the bank, with personal bank accounts.")
Person(customerB, "Banking Customer B")
Person_Ext(customerC, "Banking Customer C", "desc")
Person(customerD, "Banking Customer D", "A customer of the bank, <br/> with personal bank accounts.")
System(SystemAA, "Internet Banking System", "Allows customers to view information about their bank accounts, and make payments.")
Enterprise_Boundary(b1, "BankBoundary") {
SystemDb_Ext(SystemE, "Mainframe Banking System", "Stores all of the core banking information about customers, accounts, transactions, etc.")
System_Boundary(b2, "BankBoundary2") {
System(SystemA, "Banking System A")
System(SystemB, "Banking System B", "A system of the bank, with personal bank accounts. next line.")
}
System_Ext(SystemC, "E-mail system", "The internal Microsoft Exchange e-mail system.")
SystemDb(SystemD, "Banking System D Database", "A system of the bank, with personal bank accounts.")
Boundary(b3, "BankBoundary3", "boundary") {
SystemQueue(SystemF, "Banking System F Queue", "A system of the bank.")
SystemQueue_Ext(SystemG, "Banking System G Queue", "A system of the bank, with personal bank accounts.")
}
}
}
BiRel(customerA, SystemAA, "Uses")
BiRel(SystemAA, SystemE, "Uses")
Rel(SystemAA, SystemC, "Sends e-mails", "SMTP")
Rel(SystemC, customerA, "Sends e-mails to")
UpdateElementStyle(customerA, $fontColor="red", $bgColor="grey", $borderColor="red")
UpdateRelStyle(customerA, SystemAA, $textColor="blue", $lineColor="blue", $offsetX="5")
UpdateRelStyle(SystemAA, SystemE, $textColor="blue", $lineColor="blue", $offsetY="-10")
UpdateRelStyle(SystemAA, SystemC, $textColor="blue", $lineColor="blue", $offsetY="-40", $offsetX="-50")
UpdateRelStyle(SystemC, customerA, $textColor="red", $lineColor="red", $offsetX="-50", $offsetY="20")
UpdateLayoutConfig($c4ShapeInRow="3", $c4BoundaryInRow="1")
````
### Mindmaps
````md
```mermaid
mindmap
root((mindmap))
Origins
Long history
::icon(fa fa-book)
Popularisation
British popular psychology author Tony Buzan
Research
On effectiveness<br/>and features
On Automatic creation
Uses
Creative techniques
Strategic planning
Argument mapping
Tools
Pen and paper
Mermaid
```
````
````mermaid
mindmap
root((mindmap))
Origins
Long history
::icon(fa fa-book)
Popularisation
British popular psychology author Tony Buzan
Research
On effectiveness<br/>and features
On Automatic creation
Uses
Creative techniques
Strategic planning
Argument mapping
Tools
Pen and paper
Mermaid
````
### Timeline
````md
```mermaid
timeline
title History of Social Media Platform
2002 : LinkedIn
2004 : Facebook
: Google
2005 : Youtube
2006 : Twitter
```
````
````mermaid
timeline
title History of Social Media Platform
2002 : LinkedIn
2004 : Facebook
: Google
2005 : Youtube
2006 : Twitter
````
### ZenUML
ZenUML is currently not available with the Mermaid version shipped with the theme due to further required dependencies. Use [sequence diagrams](#sequence-diagram-with-configuration-directive) instead.
<!--
````md
```mermaid
zenuml
title Annotators
@Actor Alice
@Database Bob
Alice->Bob: Hi Bob
Bob->Alice: Hi Alice
```
````
````mermaid
zenuml
title Annotators
@Actor Alice
@Database Bob
Alice->Bob: Hi Bob
Bob->Alice: Hi Alice
````
-->
### Sankey
````md
```mermaid
sankey-beta
%% source,target,value
Electricity grid,Over generation / exports,104.453
Electricity grid,Heating and cooling - homes,113.726
Electricity grid,H2 conversion,27.14
```
````
````mermaid
sankey-beta
%% source,target,value
Electricity grid,Over generation / exports,104.453
Electricity grid,Heating and cooling - homes,113.726
Electricity grid,H2 conversion,27.14
````
### XYChart
````md
```mermaid
xychart-beta
title "Sales Revenue"
x-axis [jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec]
y-axis "Revenue (in $)" 4000 --> 11000
bar [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
line [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
```
````
````mermaid
xychart-beta
title "Sales Revenue"
x-axis [jan, feb, mar, apr, may, jun, jul, aug, sep, oct, nov, dec]
y-axis "Revenue (in $)" 4000 --> 11000
bar [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
line [5000, 6000, 7500, 8200, 9500, 10500, 11000, 10200, 9200, 8500, 7000, 6000]
````
### Block Diagram
````md
```mermaid
block-beta
columns 1
db(("DB"))
blockArrowId6<["&nbsp;&nbsp;&nbsp;"]>(down)
block:ID
A
B["A wide one in the middle"]
C
end
space
D
ID --> D
C --> D
style B fill:#969,stroke:#333,stroke-width:4px
```
````
````mermaid
block-beta
columns 1
db(("DB"))
blockArrowId6<["&nbsp;&nbsp;&nbsp;"]>(down)
block:ID
A
B["A wide one in the middle"]
C
end
space
D
ID --> D
C --> D
style B fill:#969,stroke:#333,stroke-width:4px
````
### Packet
````md
```mermaid
---
title: "TCP Packet"
---
packet-beta
0-15: "Source Port"
16-31: "Destination Port"
32-63: "Sequence Number"
64-95: "Acknowledgment Number"
96-99: "Data Offset"
100-105: "Reserved"
106: "URG"
107: "ACK"
108: "PSH"
109: "RST"
110: "SYN"
111: "FIN"
112-127: "Window"
128-143: "Checksum"
144-159: "Urgent Pointer"
160-191: "(Options and Padding)"
192-255: "Data (variable length)"
```
````
````mermaid
---
title: "TCP Packet"
---
packet-beta
0-15: "Source Port"
16-31: "Destination Port"
32-63: "Sequence Number"
64-95: "Acknowledgment Number"
96-99: "Data Offset"
100-105: "Reserved"
106: "URG"
107: "ACK"
108: "PSH"
109: "RST"
110: "SYN"
111: "FIN"
112-127: "Window"
128-143: "Checksum"
144-159: "Urgent Pointer"
160-191: "(Options and Padding)"
192-255: "Data (variable length)"
````
### Kanban
````md
```mermaid
---
config:
kanban:
ticketBaseUrl: 'https://mermaidchart.atlassian.net/browse/#TICKET#'
---
kanban
Todo
[Create Documentation]
docs[Create Blog about the new diagram]
[In progress]
id6[Create renderer so that it works in all cases. We also add som extra text here for testing purposes. And some more just for the extra flare.]
id9[Ready for deploy]
id8[Design grammar]@{ assigned: 'knsv' }
id10[Ready for test]
id4[Create parsing tests]@{ ticket: MC-2038, assigned: 'K.Sveidqvist', priority: 'High' }
id66[last item]@{ priority: 'Very Low', assigned: 'knsv' }
id11[Done]
id5[define getData]
id2[Title of diagram is more than 100 chars when user duplicates diagram with 100 char]@{ ticket: MC-2036, priority: 'Very High'}
id3[Update DB function]@{ ticket: MC-2037, assigned: knsv, priority: 'High' }
id12[Can't reproduce]
id3[Weird flickering in Firefox]
```
````
````mermaid
---
config:
kanban:
ticketBaseUrl: 'https://mermaidchart.atlassian.net/browse/#TICKET#'
---
kanban
Todo
[Create Documentation]
docs[Create Blog about the new diagram]
[In progress]
id6[Create renderer so that it works in all cases. We also add som extra text here for testing purposes. And some more just for the extra flare.]
id9[Ready for deploy]
id8[Design grammar]@{ assigned: 'knsv' }
id10[Ready for test]
id4[Create parsing tests]@{ ticket: MC-2038, assigned: 'K.Sveidqvist', priority: 'High' }
id66[last item]@{ priority: 'Very Low', assigned: 'knsv' }
id11[Done]
id5[define getData]
id2[Title of diagram is more than 100 chars when user duplicates diagram with 100 char]@{ ticket: MC-2036, priority: 'Very High'}
id3[Update DB function]@{ ticket: MC-2037, assigned: knsv, priority: 'High' }
id12[Can't reproduce]
id3[Weird flickering in Firefox]
````
### Architecture
````md
```mermaid
architecture-beta
group api(cloud)[API]
service db(database)[Database] in api
service disk1(disk)[Storage] in api
service disk2(disk)[Storage] in api
service server(server)[Server] in api
db:L -- R:server
disk1:T -- B:server
disk2:T -- B:db
```
````
````mermaid
architecture-beta
group api(cloud)[API]
service db(database)[Database] in api
service disk1(disk)[Storage] in api
service disk2(disk)[Storage] in api
service server(server)[Server] in api
db:L -- R:server
disk1:T -- B:server
disk2:T -- B:db
````