content/static: rewrite keyboard.js with typescript

For golang/go#43359

Change-Id: I5d5331c5aa072650bb97d4bf70c6a1df00a3602f
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/299256
Trust: Jamal Carvalho <jamal@golang.org>
Reviewed-by: Julie Qiu <julie@golang.org>

content/static/js/keyboard.js

@@ -1,23 +1,23 @@
-/**
+'use strict';
+/*!
  * @license
  * Copyright 2019-2020 The Go Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style
  * license that can be found in the LICENSE file.
  */
-
-// This file implements the behavior of the keyboard shortcut which allows
-// for users to press 'y' to to change browser URL to the canonical URL
-// without triggering a reload.
-
-const canonicalURLPath = document.querySelector('.js-canonicalURLPath').dataset['canonicalUrlPath'];
+var _a;
+const canonicalURLPath =
+  (_a = document.querySelector('.js-canonicalURLPath')) === null || _a === void 0
+    ? void 0
+    : _a.dataset['canonicalUrlPath'];
 if (canonicalURLPath && canonicalURLPath !== '') {
   document.addEventListener('keydown', e => {
-    // TODO(golang.org/issue/40246): consolidate keyboard shortcut behavior across the site.
-    const t = e.target.tagName;
+    var _a, _b;
+    const t = (_a = e.target) === null || _a === void 0 ? void 0 : _a.tagName;
     if (t === 'INPUT' || t === 'SELECT' || t === 'TEXTAREA') {
       return;
     }
-    if (e.target.isContentEditable) {
+    if ((_b = e.target) === null || _b === void 0 ? void 0 : _b.isContentEditable) {
       return;
     }
     if (e.metaKey || e.ctrlKey) {
@@ -30,3 +30,4 @@ if (canonicalURLPath && canonicalURLPath !== '') {
     }
   });
 }
+//# sourceMappingURL=keyboard.js.map

content/static/js/keyboard.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"keyboard.js","sourceRoot":"","sources":["keyboard.ts"],"names":[],"mappings":";AAAA;;;;;GAKG;;AAMH,MAAM,gBAAgB,SAAG,QAAQ,CAAC,aAAa,CAAiB,sBAAsB,CAAC,0CAAE,OAAO,CAC9F,kBAAkB,CACnB,CAAC;AACF,IAAI,gBAAgB,IAAI,gBAAgB,KAAK,EAAE,EAAE;IAC/C,QAAQ,CAAC,gBAAgB,CAAC,SAAS,EAAE,CAAC,CAAC,EAAE;;QAEvC,MAAM,CAAC,SAAI,CAAC,CAAC,MAAsB,0CAAE,OAAO,CAAC;QAC7C,IAAI,CAAC,KAAK,OAAO,IAAI,CAAC,KAAK,QAAQ,IAAI,CAAC,KAAK,UAAU,EAAE;YACvD,OAAO;SACR;QACD,UAAK,CAAC,CAAC,MAAsB,0CAAE,iBAAiB,EAAE;YAChD,OAAO;SACR;QACD,IAAI,CAAC,CAAC,OAAO,IAAI,CAAC,CAAC,OAAO,EAAE;YAC1B,OAAO;SACR;QACD,QAAQ,CAAC,CAAC,GAAG,EAAE;YACb,KAAK,GAAG;gBACN,MAAM,CAAC,OAAO,CAAC,YAAY,CAAC,IAAI,EAAE,EAAE,EAAE,gBAAgB,CAAC,CAAC;gBACxD,MAAM;SACT;IACH,CAAC,CAAC,CAAC;CACJ"}

content/static/js/keyboard.ts

@@ -0,0 +1,34 @@
+/*!
+ * @license
+ * Copyright 2019-2020 The Go Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file.
+ */
+
+// This file implements the behavior of the keyboard shortcut which allows
+// for users to press 'y' to to change browser URL to the canonical URL
+// without triggering a reload.
+
+const canonicalURLPath = document.querySelector<HTMLDivElement>('.js-canonicalURLPath')?.dataset[
+  'canonicalUrlPath'
+];
+if (canonicalURLPath && canonicalURLPath !== '') {
+  document.addEventListener('keydown', e => {
+    // TODO(golang.org/issue/40246): consolidate keyboard shortcut behavior across the site.
+    const t = (e.target as HTMLElement)?.tagName;
+    if (t === 'INPUT' || t === 'SELECT' || t === 'TEXTAREA') {
+      return;
+    }
+    if ((e.target as HTMLElement)?.isContentEditable) {
+      return;
+    }
+    if (e.metaKey || e.ctrlKey) {
+      return;
+    }
+    switch (e.key) {
+      case 'y':
+        window.history.replaceState(null, '', canonicalURLPath);
+        break;
+    }
+  });
+}