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fix: derive ogSlug from inputPath to fix Eleventy 3.x race condition

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page.url in eleventyComputed returns URLs from other pages being
processed concurrently in Eleventy 3.x parallel rendering. This caused
OG images to show wrong post types and titles (e.g., a note showing
"Reply" badge from a completely different post).

Fix: use page.inputPath (physical file path) which is always correct,
matching the approach already used by the permalink computation.
This commit is contained in:
Ricardo
2026-02-24 17:55:31 +01:00
parent 167b6620cc
commit a7e68ee941
1 changed files with 31 additions and 19 deletions
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_data/eleventyComputed.js
+31 -19
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@@ -1,10 +1,13 @@
/**
* Computed data resolved during the data cascade (sequential, per-page).
* Computed data resolved during the data cascade.
*
* Eleventy 3.x renders Nunjucks templates in parallel, which causes
* `page.url` and `page.fileSlug` to return wrong values when read
* via {% set %} in templates. By computing OG-related values here,
* they are resolved before parallel rendering begins.
* Eleventy 3.x parallel rendering causes `page.url` and `page.fileSlug`
* to return values from OTHER pages being processed concurrently.
* This affects both templates and eleventyComputed functions.
*
* Fix: ALL computed values derive from `page.inputPath` (the physical file
* path on disk), which is always correct regardless of parallel rendering.
* NEVER use `page.url` or `page.fileSlug` here.
*
* See: https://github.com/11ty/eleventy/issues/3183
*/
@@ -47,30 +50,39 @@ export default {
return data.permalink;
},
// OG image slug — must reconstruct date-prefixed filename from URL segments.
// OG image slug — derive from inputPath (physical file), NOT page.url.
// page.url suffers from Eleventy 3.x parallel rendering race conditions
// where it can return the URL of a DIFFERENT page being processed concurrently.
// inputPath is the physical file path, which is always correct.
// OG images are generated as {yyyy}-{MM}-{dd}-{slug}.png by lib/og.js.
// With new URL structure /type/yyyy/MM/dd/slug/, we reconstruct the filename.
ogSlug: (data) => {
const url = data.page?.url || "";
const segments = url.split("/").filter(Boolean);
// Date-based URL: /type/yyyy/MM/dd/slug/ → 5 segments
if (segments.length === 5) {
const [, year, month, day, slug] = segments;
const inputPath = data.page?.inputPath || "";
const match = inputPath.match(
/content\/([^/]+)\/(\d{4})-(\d{2})-(\d{2})-(.+)\.md$/,
);
if (match) {
const [, , year, month, day, slug] = match;
return `${year}-${month}-${day}-${slug}`;
}
// Fallback: last segment (for pages, legacy URLs)
return segments[segments.length - 1] || "";
// Fallback for pages/root files: use last path segment
const segments = inputPath.split("/").filter(Boolean);
const last = segments[segments.length - 1] || "";
return last.replace(/\.md$/, "");
},
hasOgImage: (data) => {
const url = data.page?.url || "";
const segments = url.split("/").filter(Boolean);
const inputPath = data.page?.inputPath || "";
const match = inputPath.match(
/content\/([^/]+)\/(\d{4})-(\d{2})-(\d{2})-(.+)\.md$/,
);
let slug;
if (segments.length === 5) {
const [, year, month, day, s] = segments;
if (match) {
const [, , year, month, day, s] = match;
slug = `${year}-${month}-${day}-${s}`;
} else {
slug = segments[segments.length - 1] || "";
const segments = inputPath.split("/").filter(Boolean);
const last = segments[segments.length - 1] || "";
slug = last.replace(/\.md$/, "");
}
if (!slug) return false;
const ogPath = resolve(__dirname, "..", ".cache", "og", `${slug}.png`);