tab focusing

src/util/focus.js

@@ -0,0 +1,34 @@
+import {dom} from 'ionic2/util'
+
+
+let isKeyInputEnabled = false
+
+function keyDown() {
+  if (!isKeyInputEnabled) {
+    isKeyInputEnabled = true
+    dom.raf(enableKeyInput)
+  }
+}
+dom.ready().then(function() {
+  document.addEventListener('keydown', keyDown)
+})
+
+
+function enableKeyInput() {
+  document.body.classList[isKeyInputEnabled ? 'add' : 'remove']('key-input')
+
+  if (isKeyInputEnabled) {
+    document.addEventListener('mousedown', pointerDown)
+    document.addEventListener('touchstart', pointerDown)
+
+  } else {
+    document.removeEventListener('mousedown', pointerDown)
+    document.removeEventListener('touchstart', pointerDown)
+  }
+}
+
+function pointerDown() {
+  isKeyInputEnabled = false
+  dom.raf(enableKeyInput)
+}
+