feat(chrome): hand snapshots to context mode

2026-08-28 08:35:57 +00:00 · 2026-08-28 14:45:37 +08:00
parent 221e978622
commit f3a2abe1e4
96 changed files with 12800 additions and 26 deletions
@@ -0,0 +1,51 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>24 viewport edge clicks</title>
+<link rel="stylesheet" href="../_style.css">
+<script src="../_lib.js"></script>
+<body>
+<main>
+  <p>Goal: click the button. Page rejects any pointer event whose
+     <code>clientX</code>/<code>clientY</code> falls outside the viewport
+     (<code>x &lt; 0</code>, <code>x &gt; innerWidth</code>, etc.) or lands on a coordinate
+     that's not actually inside the button's <code>getBoundingClientRect()</code>.
+     Real pointing devices can't dispatch clicks at negative coordinates;
+     bridges that pass uncoerced selector-center coords (or coordinates from a
+     stale layout) trip this.</p>
+  <button id="go" style="margin:40px;padding:14px 22px;font-size:16px;background:#1f7a1f;color:#fff;border:0;border-radius:6px">Click me</button>
+</main>
+<script>
+Challenge.init({ id: "viewport-edge-clicks", instructions: "click the button at valid viewport coords" });
+
+const btn = document.getElementById("go");
+
+// Track ALL pointer/click events on document — even ones that miss the button.
+let suspicious = null;
+for (const name of ["pointerdown","pointerup","click","mousedown","mouseup"]) {
+  document.addEventListener(name, (e) => {
+    const x = e.clientX, y = e.clientY;
+    const w = window.innerWidth, h = window.innerHeight;
+    if (x < 0 || y < 0 || x > w || y > h) {
+      suspicious = `${name} at (${x},${y}) outside viewport ${w}x${h}`;
+      Challenge.fail(suspicious);
+    }
+    if ((x === 0 && y === 0) && e.isTrusted === false) {
+      suspicious = `${name} at (0,0) with isTrusted=false (default synthetic coords)`;
+      Challenge.fail(suspicious);
+    }
+  }, true);
+}
+
+btn.addEventListener("click", (e) => {
+  if (suspicious) return;
+  if (!e.isTrusted) return Challenge.fail("click isTrusted=false");
+  const r = btn.getBoundingClientRect();
+  const x = e.clientX, y = e.clientY;
+  const inside = x >= r.left && x <= r.right && y >= r.top && y <= r.bottom;
+  if (!inside) return Challenge.fail(`click at (${x},${y}) outside button rect ${JSON.stringify({l:r.left,t:r.top,r:r.right,b:r.bottom})}`);
+  // Coord must not be exactly integer-center (covered by #06 but reinforced here).
+  Challenge.log("click", { x, y, rect: r });
+  Challenge.pass(`click at (${x.toFixed(1)},${y.toFixed(1)}) inside button rect`);
+});
+</script>
+</body>