I recently shipped Mermaid diagram support to Forem , the open source platform that powers DEV. Fenced mermaid code blocks now render as actual diagrams instead of plain highlighted source. Which means this renders, right here, on this post: flowchart TD A[CodeQL flags innerHTML] --> B[Add DOMPurify] B --> C{Measure the output} C -->|assumed| D[Ship it] C -->|actually| E[Labels are gone] E --> F[Find the real bug] The feature itself is not the...