From 7d39ac9335135511ebbc061e416dab9f03d77462 Mon Sep 17 00:00:00 2001
From: andoan16 <33853760+andoan16@users.noreply.github.com>
Date: Sat, 28 Mar 2026 12:27:02 +0700
Subject: [PATCH] refactor(Util): create bundlelinker utility to track and
 propagate bundle additions across template renders

This new utility class tracks bundle additions (CSS/JS) that were registered during collection item renders, so they can be replayed when those items' templateContent is accessed by a parent template. This is the core mechanism needed to solve the issue where nested partials' CSS/JS includes aren't loaded when accessed via collections.

Affected files: BundleLinker.js

Signed-off-by: andoan16 <33853760+andoan16@users.noreply.github.com>
---
 src/Util/BundleLinker.js | 45 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 src/Util/BundleLinker.js

diff --git a/src/Util/BundleLinker.js b/src/Util/BundleLinker.js
new file mode 100644
index 000000000..8c1e47f8a
--- /dev/null
+++ b/src/Util/BundleLinker.js
@@ -0,0 +1,45 @@
+import debugUtil from "debug";
+
+const debug = debugUtil("Eleventy:BundleLinker");
+
+class BundleLinker {
+	#additions = new Map();
+
+	record(key, additions) {
+		if (!additions || additions.length === 0) {
+			return;
+		}
+		if (!this.#additions.has(key)) {
+			this.#additions.set(key, []);
+		}
+		for (let addition of additions) {
+			this.#additions.get(key).push(addition);
+		}
+		debug("Recorded %d bundle additions for key %o", additions.length, key);
+	}
+
+	replay(key, bundleManager) {
+		if (!this.#additions.has(key)) {
+			return;
+		}
+		let additions = this.#additions.get(key);
+		debug("Replaying %d bundle additions for key %o", additions.length, key);
+		for (let addition of additions) {
+			bundleManager.addToBundle(addition.bucket, addition.content, addition.urlOverride);
+		}
+	}
+
+	has(key) {
+		return this.#additions.has(key);
+	}
+
+	delete(key) {
+		this.#additions.delete(key);
+	}
+
+	clear() {
+		this.#additions.clear();
+	}
+}
+
+export { BundleLinker };