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modularize renderer (#552)

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mrdrogdrog 2020-09-08 21:49:42 +02:00 • committed by GitHub
parent ac00bc98c0
commit a86d4cbc58
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15 changed files with 580 additions and 455 deletions
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13
src/components/markdown-renderer/utils/use-post-toc-ast-on-change.ts Normal file
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import equal from 'fast-deep-equal'
import { RefObject, useEffect, useRef } from 'react'
import { TocAst } from '../../../external-types/markdown-it-toc-done-right/interface'
export const usePostTocAstOnChange = (tocAst: RefObject<TocAst|undefined>, onTocChange?: (ast: TocAst) => void): void => {
const lastTocAst = useRef<TocAst>()
useEffect(() => {
if (onTocChange && tocAst.current && !equal(tocAst, lastTocAst.current)) {
lastTocAst.current = tocAst.current
onTocChange(tocAst.current)
}
}, [onTocChange, tocAst])
}