yeet

node_modules/react-native-web/dist/exports/AppState/index.js

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+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
+
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
+
+/**
+ * Copyright (c) Nicolas Gallagher.
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * 
+ */
+import { canUseDOM } from 'fbjs/lib/ExecutionEnvironment';
+import findIndex from 'array-find-index';
+import invariant from 'fbjs/lib/invariant'; // Android 4.4 browser
+
+var isPrefixed = canUseDOM && !document.hasOwnProperty('hidden') && document.hasOwnProperty('webkitHidden');
+var EVENT_TYPES = ['change', 'memoryWarning'];
+var VISIBILITY_CHANGE_EVENT = isPrefixed ? 'webkitvisibilitychange' : 'visibilitychange';
+var VISIBILITY_STATE_PROPERTY = isPrefixed ? 'webkitVisibilityState' : 'visibilityState';
+var AppStates = {
+  BACKGROUND: 'background',
+  ACTIVE: 'active'
+};
+var listeners = [];
+
+var AppState =
+/*#__PURE__*/
+function () {
+  function AppState() {}
+
+  AppState.addEventListener = function addEventListener(type, handler) {
+    if (AppState.isAvailable) {
+      invariant(EVENT_TYPES.indexOf(type) !== -1, 'Trying to subscribe to unknown event: "%s"', type);
+
+      if (type === 'change') {
+        var callback = function callback() {
+          return handler(AppState.currentState);
+        };
+
+        listeners.push([handler, callback]);
+        document.addEventListener(VISIBILITY_CHANGE_EVENT, callback, false);
+      }
+    }
+  };
+
+  AppState.removeEventListener = function removeEventListener(type, handler) {
+    if (AppState.isAvailable) {
+      invariant(EVENT_TYPES.indexOf(type) !== -1, 'Trying to remove listener for unknown event: "%s"', type);
+
+      if (type === 'change') {
+        var listenerIndex = findIndex(listeners, function (pair) {
+          return pair[0] === handler;
+        });
+        invariant(listenerIndex !== -1, 'Trying to remove AppState listener for unregistered handler');
+        var callback = listeners[listenerIndex][1];
+        document.removeEventListener(VISIBILITY_CHANGE_EVENT, callback, false);
+        listeners.splice(listenerIndex, 1);
+      }
+    }
+  };
+
+  _createClass(AppState, null, [{
+    key: "currentState",
+    get: function get() {
+      if (!AppState.isAvailable) {
+        return AppStates.ACTIVE;
+      }
+
+      switch (document[VISIBILITY_STATE_PROPERTY]) {
+        case 'hidden':
+        case 'prerender':
+        case 'unloaded':
+          return AppStates.BACKGROUND;
+
+        default:
+          return AppStates.ACTIVE;
+      }
+    }
+  }]);
+
+  return AppState;
+}();
+
+AppState.isAvailable = canUseDOM && document[VISIBILITY_STATE_PROPERTY];
+export { AppState as default };