fix to restrict window blur/focus handling, closes #773

package.json

@@ -15,6 +15,7 @@
     "immutable": "^3.8.1",
     "is-empty": "^1.0.0",
     "is-in-browser": "^1.1.3",
+    "is-window": "^1.0.2",
     "keycode": "^2.1.2",
     "prop-types": "^15.5.8",
     "react-portal": "^3.0.0",

src/components/content.js

@@ -3,6 +3,7 @@ import Debug from 'debug'
 import React from 'react'
 import Types from 'prop-types'
 import getWindow from 'get-window'
+import isWindow from 'is-window'
 import keycode from 'keycode'
 
 import TYPES from '../constants/types'
@@ -825,7 +826,8 @@ class Content extends React.Component {
    * @param {Event} event
    */
 
-  onWindowBlur = (e) => {
+  onWindowBlur = (event) => {
+    if (!isWindow(event.target)) return
     debug('onWindowBlur')
     this.tmp.isWindowFocused = false
   }
@@ -836,7 +838,8 @@ class Content extends React.Component {
    * @param {Event} event
    */
 
-  onWindowFocus = (e) => {
+  onWindowFocus = (event) => {
+    if (!isWindow(event.target)) return
     debug('onWindowFocus')
     this.tmp.isWindowFocused = true
   }

yarn.lock

@@ -3374,6 +3374,10 @@ is-utf8@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-utf8/-/is-utf8-0.2.1.tgz#4b0da1442104d1b336340e80797e865cf39f7d72"
 
+is-window@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/is-window/-/is-window-1.0.2.tgz#2c896ca53db97de45d3c33133a65d8c9f563480d"
+
 isarray@0.0.1, isarray@~0.0.1:
   version "0.0.1"
   resolved "https://registry.yarnpkg.com/isarray/-/isarray-0.0.1.tgz#8a18acfca9a8f4177e09abfc6038939b05d1eedf"