compatibility fixes (#358)

* fix polyfill NodeList forEach

* contentDocument.contains for IE

* polyfill DOMTokenList forEach

src/replay/index.ts

@@ -889,7 +889,15 @@ export class Replayer {
         return queue.push(mutation);
       }
 
-      const parentInDocument = this.iframe.contentDocument.contains(parent);
+      let parentInDocument = null;
+      if (this.iframe.contentDocument.contains) {
+        parentInDocument = this.iframe.contentDocument.contains(parent);
+      } else if (this.iframe.contentDocument.body.contains) {
+        // fix for IE
+        // refer 'Internet Explorer notes' at https://developer.mozilla.org/zh-CN/docs/Web/API/Document 
+        parentInDocument = this.iframe.contentDocument.body.contains(parent);
+      }
+
       if (useVirtualParent && parentInDocument) {
         const virtualParent = (document.createDocumentFragment() as unknown) as INode;
         mirror.map[mutation.parentId] = virtualParent;

src/utils.ts

@@ -226,6 +226,11 @@ export function polyfill(win = window) {
     win.NodeList.prototype.forEach = (Array.prototype
       .forEach as unknown) as NodeList['forEach'];
   }
+
+  if ('DOMTokenList' in win && !win.DOMTokenList.prototype.forEach) {
+    win.DOMTokenList.prototype.forEach = (Array.prototype
+      .forEach as unknown) as DOMTokenList['forEach'];
+  }
 }
 
 export function needCastInSyncMode(event: eventWithTime): boolean {