Created
August 19, 2021 01:43
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Wrapper component for mermaid.js to use in React+TS
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import React, { useEffect, useRef, useState } from "react"; | |
import mermaidAPI from "mermaid"; | |
type Props = { | |
divId: string; | |
children: string; | |
}; | |
export default function Mermaid({ children }: Props) { | |
const [html, setHtml] = useState<string>(""); | |
const divRef = useRef<HTMLDivElement>(null); | |
useEffect(() => { | |
if (!divRef.current) { | |
return; | |
} | |
try { | |
mermaidAPI.initialize({ | |
securityLevel: "loose", | |
logLevel: 1, | |
startOnLoad: true, | |
flowchart: { | |
useMaxWidth: true, | |
htmlLabels: true, | |
}, | |
}); | |
mermaidAPI.render("mermaid", children, (svgCode, bindFunc) => { | |
setHtml(svgCode); | |
setTimeout(() => { | |
bindFunc(divRef.current!); | |
}, 500); | |
}, divRef.current); | |
} catch (error) { | |
console.error(error); | |
console.error(children); | |
} | |
}, [children, divRef]); | |
return ( | |
<div | |
className="mermaid flex justify-center" | |
dangerouslySetInnerHTML={{ __html: html }} | |
ref={divRef} | |
> | |
</div> | |
); | |
} |
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need to use setTimeout to bind click event with the svg after rendering.