Merge 4d4c20d into 8c36958

schmidt-sebastian · web-flow · commit 0db441751ee0 · 2020-04-27T09:22:09.000-07:00
diff --git a/packages/firestore/src/util/async_queue.ts b/packages/firestore/src/util/async_queue.ts
@@ -240,7 +240,7 @@ export class AsyncQueue {
 
   constructor() {
     const window = PlatformSupport.getPlatform().window;
-    if (window) {
+    if (window && typeof window.addEventListener === 'function') {
       window.addEventListener('visibilitychange', this.visibilityHandler);
     }
   }

Original file line number	Diff line number	Diff line change
`@@ -240,7 +240,7 @@ export class AsyncQueue {`
`240`	`240`
`241`	`241`	`constructor() {`
`242`	`242`	`const window = PlatformSupport.getPlatform().window;`
`243`		`- if (window) {`
	`243`	`+ if (window && typeof window.addEventListener === 'function') {`
`244`	`244`	`window.addEventListener('visibilitychange', this.visibilityHandler);`
`245`	`245`	`}`
`246`	`246`	`}`