release: WRNexusJS 0.8.2

packages/csr/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@wrnexus/csr",
-  "version": "0.8.1",
+  "version": "0.8.2",
   "type": "module",
   "main": "src/index.ts",
   "exports": {

packages/csr/src/nav-runtime.ts

@@ -638,7 +638,10 @@ export const NAV_RUNTIME = String.raw`
     while (prefetched.size > 20) prefetched.delete(prefetched.keys().next().value);
   }
 
-  document.addEventListener("pointerover", function (event) {
+  // Prefetch only on explicit pointer intent. Delegated pointerover fires when
+  // scrolling moves links underneath a stationary pointer, which can otherwise
+  // download every link on a long index page.
+  document.addEventListener("pointerdown", function (event) {
     var anchor = event.target && event.target.closest ? event.target.closest("a") : null;
     prefetch(anchor);
   }, { passive: true });

packages/csr/test/nav.test.ts

@@ -82,6 +82,18 @@ test("prefetches focused routes once and reuses the document during navigation",
   expect(win.document.querySelector("h1")?.textContent).toBe("Prefetched");
 });
 
+test("does not prefetch links merely passing under the pointer while scrolling", async () => {
+  install(`<div id="app"><a href="/about" id="prefetch">About</a></div>`);
+  const link = win.document.getElementById("prefetch");
+  link.dispatchEvent(new win.PointerEvent("pointerover", { bubbles: true }));
+  await flush();
+  expect(fetchCalls).toHaveLength(0);
+  link.dispatchEvent(new win.PointerEvent("pointerdown", { bubbles: true }));
+  await flush();
+  expect(fetchCalls).toHaveLength(1);
+  expect(fetchCalls[0]?.opts.headers["x-wrnexus-prefetch"]).toBe("1");
+});
+
 test("ignores cross-origin links (full navigation)", async () => {
   install(`<div id="app"><a href="https://other.test/x" id="lnk">x</a></div>`);
   win.document.getElementById("lnk").click();