From 29755da8797dc94613a23fe050ddd6ef9ffab607 Mon Sep 17 00:00:00 2001
From: Lenz Weber-Tronic <lorenz.weber-tronic@apollographql.com>
Date: Tue, 25 Jun 2024 22:01:21 +0200
Subject: [PATCH] Add `.d.cts` files for cjs bundles (#11905)

---
 .changeset/nine-icons-destroy.md |  5 +++++
 config/prepareDist.js            | 11 +++++++++++
 package.json                     |  1 +
 3 files changed, 17 insertions(+)
 create mode 100644 .changeset/nine-icons-destroy.md

diff --git a/.changeset/nine-icons-destroy.md b/.changeset/nine-icons-destroy.md
new file mode 100644
index 00000000000..51983bca1e6
--- /dev/null
+++ b/.changeset/nine-icons-destroy.md
@@ -0,0 +1,5 @@
+---
+"@apollo/client": patch
+---
+
+Add `.d.cts` files for cjs bundles
diff --git a/config/prepareDist.js b/config/prepareDist.js
index b0a4a1d2bd8..68bfbce2c2e 100644
--- a/config/prepareDist.js
+++ b/config/prepareDist.js
@@ -92,3 +92,14 @@ entryPoints.forEach(function buildPackageJson({
     ) + "\n"
   );
 });
+
+entryPoints.forEach(function buildCts({
+  dirs,
+  bundleName = dirs[dirs.length - 1],
+}) {
+  if (!dirs.length) return;
+  fs.writeFileSync(
+    path.join(distRoot, ...dirs, `${bundleName}.d.cts`),
+    'export * from "./index.d.ts";\n'
+  );
+});
diff --git a/package.json b/package.json
index 3d9ef55cdac..a6e5eba61b8 100644
--- a/package.json
+++ b/package.json
@@ -199,6 +199,7 @@
     "**/*.md",
     "**/*.cjs",
     "**/*.cjs.map",
+    "**/*.d.cts",
     "**/*.js",
     "**/*.js.map",
     "**/*.d.ts",