Unverified50% confidenceFactExact time
In Mermaid syntax, :: is the style class application operator, normally written like `A:::myClass --> B`, and it does not appear on a line by itself.
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
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Related Claims
VerifiedMermaid is a text-based diagram description language that allows users to generate flowcharts, sequence diagrams, Gantt charts, class diagrams, state diagrams, and other chart types through concise Markdown-like syntax.66% similarUnverifiedWhen the Mermaid parser encounters a syntax error that lexically cannot form a complete statement (for example, a line starting with an isolated ::: with no following node name or closing structure), it does not throw an exception, but instead degrades it into rendering an error node.66% similarUnverifiedMermaid uses Markdown-like syntax that can be rendered directly on platforms such as GitHub README, Notion, and Obsidian, while PlantUML has more complex syntax but supports a richer variety of UML diagram types.63% similarUnverifiedMermaid 的时序图语法部分遵循 UML 规范，保留了时序图、类图、状态图等 UML 核心图表类型的语义表达能力62% similarVerifiedVS Code itself is built with TypeScript.54% similar
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