Commit 8dfe1d43f189dcc9d18b44480ea8fe2d3b021136 | react-markdown

author	clover caruso <git@paperclover.net> 2026-03-20 01:17:08-07:00
committer	clover caruso <git@paperclover.net> 2026-03-20 14:11:08-07:00
log	8dfe1d43f189dcc9d18b44480ea8fe2d3b021136
tree	e86fc72828986dd6f71d1fccc6e011bbff391861
parent	5b921620c94fade38cd72a34fe2e1d195ef19cb8
signature	Signed by SSH key SHA256:xbd+BjjhyBfwk7GVoURf9Yx0gzDerHbvYv7SddNWmAs

2 files changed, 18 insertions(+), 1 deletions(-)

src/Memoizer.ts+4-1

...	...	@@ -100,6 +100,9 @@ export class Memoizer {
100	100	// much effort), but any extra re-renders get eliminated with AST diffing.
101	101	const processor = UNWRAP(this.#astProcessor);
102	102	const parsed = this.#parsed;
	103	const replacedTailAffectedDocument = parsed
	104	.slice(blockStart)
	105	.some((block) => block.some(nodeAffectsDocument));
103	106	let parsedTree = processor.parse(content.slice(parseOffset));
104	107	let newPositions = parsedTree.children.map(
105	108	(child) => UNWRAP(UNWRAP(child.position).start.offset) + parseOffset,
...	...	@@ -118,7 +121,7 @@ export class Memoizer {
118	121	// If a reflink is involved, fall back to a full reparse. Rehydrating a
119	122	// synthetic root from cached blocks can lose source offsets on transformed
120	123	// top-level nodes, which would scramble block bucketing and key identity.
121		if (nodeAffectsDocument(parsedTree)) {
	124	if (replacedTailAffectedDocument \|\| nodeAffectsDocument(parsedTree)) {
122	125	blockStart = 0;
123	126	parseOffset = 0;
124	127	parsedTree = processor.parse(content);

tests/Memoizer.test.tsx+14

...	...	@@ -140,6 +140,20 @@ describe("Memoizer incremental rendering", () => {
140	140	expect(after).toContain('href="/two"');
141	141	});
142	142
	143	it("keeps earlier gfm footnotes rendered when a later footnote definition is removed", () => {
	144	const incremental = createMemoizer(gfmProcessor);
	145
	146	incremental.update("a[^b]\n\n[^b]: bee\n\nc");
	147	incremental.update("a[^b]\n\n[^b]: bee\n\nc[^d]\n\n[^d]: dee");
	148	const after = renderNodes(incremental.update("a[^b]\n\n[^b]: bee\n\nc[^d]"));
	149
	150	const fresh = createMemoizer(gfmProcessor);
	151	const expected = renderNodes(fresh.update("a[^b]\n\n[^b]: bee\n\nc[^d]"));
	152
	153	expect(after).toBe(expected);
	154	expect(after).toContain('id="user-content-fn-b"');
	155	});
	156
143	157	it.each([
144	158	{
145	159	content: ["alpha\n\nbeta", "alpha\nbeta", "alpha\n\nbeta\n\ngamma", "alpha\n\nbeta"],