fix: bring back Android 4.x support (#6289)

Use a WeakMap and Set shams for browsers that don't support it.

src/js/component.js

@@ -98,9 +98,38 @@ class Component {
     this.childIndex_ = {};
     this.childNameIndex_ = {};
 
-    this.setTimeoutIds_ = new Set();
-    this.setIntervalIds_ = new Set();
-    this.rafIds_ = new Set();
+    let SetSham;
+
+    if (!window.Set) {
+      SetSham = class {
+        constructor() {
+          this.set_ = {};
+        }
+        has(key) {
+          return key in this.set_;
+        }
+        delete(key) {
+          const has = this.has(key);
+
+          delete this.set_[key];
+
+          return has;
+        }
+        add(key) {
+          this.set_[key] = 1;
+          return this;
+        }
+        forEach(callback, thisArg) {
+          for (const key in this.set_) {
+            callback.call(thisArg, key, key, this);
+          }
+        }
+      };
+    }
+
+    this.setTimeoutIds_ = window.Set ? new Set() : new SetSham();
+    this.setIntervalIds_ = window.Set ? new Set() : new SetSham();
+    this.rafIds_ = window.Set ? new Set() : new SetSham();
     this.clearingTimersOnDispose_ = false;
 
     // Add any child components in options

src/js/player.js

@@ -655,7 +655,11 @@ class Player extends Component {
       // `src` or `controls` that were set via js before the player
       // was initialized.
       Object.keys(el).forEach((k) => {
+        try {
           tag[k] = el[k];
+        } catch (e) {
+          // we got a a property like outerHTML which we can't actually copy, ignore it
+        }
       });
     }
 

src/js/utils/dom-data.js

@@ -3,6 +3,62 @@
  * @module dom-data
  */
 
+import log from './log.js';
+import * as Guid from './guid.js';
+import window from 'global/window';
+
+let FakeWeakMap;
+
+if (!window.WeakMap) {
+  FakeWeakMap = class {
+    constructor() {
+      this.vdata = 'vdata' + Math.floor(window.performance && window.performance.now() || Date.now());
+      this.data = {};
+    }
+
+    set(key, value) {
+      const access = key[this.vdata] || Guid.newGUID();
+
+      if (!key[this.vdata]) {
+        key[this.vdata] = access;
+      }
+
+      this.data[access] = value;
+
+      return this;
+    }
+
+    get(key) {
+      const access = key[this.vdata];
+
+      // we have data, return it
+      if (access) {
+        return this.data[access];
+      }
+
+      // we don't have data, return nothing.
+      // return undefined explicitly as that's the contract for this method
+      log('We have no data for this element', key);
+      return undefined;
+    }
+
+    has(key) {
+      const access = key[this.vdata];
+
+      return access in this.data;
+    }
+
+    delete(key) {
+      const access = key[this.vdata];
+
+      if (access) {
+        delete this.data[access];
+        delete key[this.vdata];
+      }
+    }
+  };
+}
+
 /**
  * Element Data Store.
  *
@@ -13,4 +69,4 @@
  * @type {Object}
  * @private
  */
-export default new WeakMap();
+export default window.WeakMap ? new WeakMap() : new FakeWeakMap();