fix(utils): Checking if parent.contains is a function before using it

.all-contributorsrc

@@ -863,6 +863,15 @@
         "code",
         "test"
       ]
+    },
+    {
+      "login": "arthurdenner",
+      "name": "Arthur Denner",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/13774309?v=4",
+      "profile": "https://github.com/arthurdenner",
+      "contributions": [
+        "code"
+      ]
     }
   ]
 }

README.md

@@ -19,7 +19,7 @@ autocomplete/dropdown/select/combobox components</p>
 [![downloads][downloads-badge]][npmcharts] [![version][version-badge]][package]
 [![MIT License][license-badge]][license]
 
-[![All Contributors](https://img.shields.io/badge/all_contributors-87-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-88-orange.svg?style=flat-square)](#contributors)
 [![PRs Welcome][prs-badge]][prs] [![Chat][chat-badge]][chat]
 [![Code of Conduct][coc-badge]][coc]
 [![Join the community on Spectrum][spectrum-badge]][spectrum]
@@ -1020,7 +1020,7 @@ Thanks goes to these people ([emoji key][emojis]):
 | [<img src="https://avatars0.githubusercontent.com/u/29493001?v=4" width="100px;"/><br /><sub><b>Austin Tackaberry</b></sub>](http://austintackaberry.co)<br />[💬](#question-austintackaberry "Answering Questions") [💻](https://github.com/paypal/downshift/commits?author=austintackaberry "Code") [📖](https://github.com/paypal/downshift/commits?author=austintackaberry "Documentation") [🐛](https://github.com/paypal/downshift/issues?q=author%3Aaustintackaberry "Bug reports") [💡](#example-austintackaberry "Examples") [🤔](#ideas-austintackaberry "Ideas, Planning, & Feedback") [👀](#review-austintackaberry "Reviewed Pull Requests") [⚠️](https://github.com/paypal/downshift/commits?author=austintackaberry "Tests") | [<img src="https://avatars3.githubusercontent.com/u/4168055?v=4" width="100px;"/><br /><sub><b>Jean Duthon</b></sub>](https://github.com/jduthon)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3Ajduthon "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=jduthon "Code") | [<img src="https://avatars3.githubusercontent.com/u/3889580?v=4" width="100px;"/><br /><sub><b>Anton Telesh</b></sub>](http://antontelesh.github.io)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3AAntontelesh "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=Antontelesh "Code") | [<img src="https://avatars3.githubusercontent.com/u/1060669?v=4" width="100px;"/><br /><sub><b>Eric Edem</b></sub>](https://github.com/ericedem)<br />[💻](https://github.com/paypal/downshift/commits?author=ericedem "Code") [📖](https://github.com/paypal/downshift/commits?author=ericedem "Documentation") [🤔](#ideas-ericedem "Ideas, Planning, & Feedback") [⚠️](https://github.com/paypal/downshift/commits?author=ericedem "Tests") | [<img src="https://avatars3.githubusercontent.com/u/3409645?v=4" width="100px;"/><br /><sub><b>Austin Wood</b></sub>](https://github.com/indiesquidge)<br />[💬](#question-indiesquidge "Answering Questions") [📖](https://github.com/paypal/downshift/commits?author=indiesquidge "Documentation") [👀](#review-indiesquidge "Reviewed Pull Requests") | [<img src="https://avatars3.githubusercontent.com/u/14275790?v=4" width="100px;"/><br /><sub><b>Mark Murray</b></sub>](https://github.com/mmmurray)<br />[🚇](#infra-mmmurray "Infrastructure (Hosting, Build-Tools, etc)") | [<img src="https://avatars0.githubusercontent.com/u/1862172?v=4" width="100px;"/><br /><sub><b>Gianmarco</b></sub>](https://github.com/gsimone)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3Agsimone "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=gsimone "Code") |
 | [<img src="https://avatars2.githubusercontent.com/u/6838136?v=4" width="100px;"/><br /><sub><b>Emmanuel Pastor</b></sub>](https://github.com/pastr)<br />[💡](#example-pastr "Examples") | [<img src="https://avatars2.githubusercontent.com/u/10345034?v=4" width="100px;"/><br /><sub><b>dalehurwitz</b></sub>](https://github.com/dalehurwitz)<br />[💻](https://github.com/paypal/downshift/commits?author=dalehurwitz "Code") | [<img src="https://avatars1.githubusercontent.com/u/4813007?v=4" width="100px;"/><br /><sub><b>Bogdan Lobor</b></sub>](https://github.com/blobor)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3Ablobor "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=blobor "Code") | [<img src="https://avatars0.githubusercontent.com/u/1127238?v=4" width="100px;"/><br /><sub><b>Luke Herrington</b></sub>](https://github.com/infiniteluke)<br />[💡](#example-infiniteluke "Examples") | [<img src="https://avatars2.githubusercontent.com/u/6361167?v=4" width="100px;"/><br /><sub><b>Brandon Clemons</b></sub>](https://github.com/drobannx)<br />[💻](https://github.com/paypal/downshift/commits?author=drobannx "Code") | [<img src="https://avatars0.githubusercontent.com/u/10591587?v=4" width="100px;"/><br /><sub><b>Kieran</b></sub>](https://github.com/aMollusk)<br />[💻](https://github.com/paypal/downshift/commits?author=aMollusk "Code") | [<img src="https://avatars3.githubusercontent.com/u/11570627?v=4" width="100px;"/><br /><sub><b>Brushedoctopus</b></sub>](https://github.com/Brushedoctopus)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3ABrushedoctopus "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=Brushedoctopus "Code") |
 | [<img src="https://avatars3.githubusercontent.com/u/5456216?v=4" width="100px;"/><br /><sub><b>Cameron Edwards</b></sub>](http://cameronpedwards.com)<br />[💻](https://github.com/paypal/downshift/commits?author=cameronprattedwards "Code") [⚠️](https://github.com/paypal/downshift/commits?author=cameronprattedwards "Tests") | [<img src="https://avatars2.githubusercontent.com/u/179534?v=4" width="100px;"/><br /><sub><b>stereobooster</b></sub>](https://github.com/stereobooster)<br />[💻](https://github.com/paypal/downshift/commits?author=stereobooster "Code") [⚠️](https://github.com/paypal/downshift/commits?author=stereobooster "Tests") | [<img src="https://avatars0.githubusercontent.com/u/934879?v=4" width="100px;"/><br /><sub><b>Trevor Pierce</b></sub>](https://github.com/1Copenut)<br />[👀](#review-1Copenut "Reviewed Pull Requests") | [<img src="https://avatars1.githubusercontent.com/u/1334982?v=4" width="100px;"/><br /><sub><b>Xuefei Li</b></sub>](http://xuefei-frank.com)<br />[💻](https://github.com/paypal/downshift/commits?author=franklixuefei "Code") | [<img src="https://avatars0.githubusercontent.com/u/7252803?v=4" width="100px;"/><br /><sub><b>Alfred Ringstad</b></sub>](https://hyperlab.se)<br />[💻](https://github.com/paypal/downshift/commits?author=alfredringstad "Code") | [<img src="https://avatars0.githubusercontent.com/u/6895497?v=4" width="100px;"/><br /><sub><b>D[oa]vid Weisz</b></sub>](https://github.com/dovidweisz)<br />[💻](https://github.com/paypal/downshift/commits?author=dovidweisz "Code") | [<img src="https://avatars0.githubusercontent.com/u/19773?v=4" width="100px;"/><br /><sub><b>Royston Shufflebotham</b></sub>](https://github.com/RoystonS)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3ARoystonS "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=RoystonS "Code") |
-| [<img src="https://avatars3.githubusercontent.com/u/6643991?v=4" width="100px;"/><br /><sub><b>Michaël De Boey</b></sub>](http://michaeldeboey.be)<br />[💻](https://github.com/paypal/downshift/commits?author=MichaelDeBoey "Code") | [<img src="https://avatars3.githubusercontent.com/u/4412771?v=4" width="100px;"/><br /><sub><b>Henry</b></sub>](https://github.com/EricHenry)<br />[💻](https://github.com/paypal/downshift/commits?author=EricHenry "Code") | [<img src="https://avatars3.githubusercontent.com/u/2180127?v=4" width="100px;"/><br /><sub><b>Andrew Walton</b></sub>](http://www.greenarrow.me)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3Agreen-arrow "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=green-arrow "Code") [⚠️](https://github.com/paypal/downshift/commits?author=green-arrow "Tests") |
+| [<img src="https://avatars3.githubusercontent.com/u/6643991?v=4" width="100px;"/><br /><sub><b>Michaël De Boey</b></sub>](http://michaeldeboey.be)<br />[💻](https://github.com/paypal/downshift/commits?author=MichaelDeBoey "Code") | [<img src="https://avatars3.githubusercontent.com/u/4412771?v=4" width="100px;"/><br /><sub><b>Henry</b></sub>](https://github.com/EricHenry)<br />[💻](https://github.com/paypal/downshift/commits?author=EricHenry "Code") | [<img src="https://avatars3.githubusercontent.com/u/2180127?v=4" width="100px;"/><br /><sub><b>Andrew Walton</b></sub>](http://www.greenarrow.me)<br />[🐛](https://github.com/paypal/downshift/issues?q=author%3Agreen-arrow "Bug reports") [💻](https://github.com/paypal/downshift/commits?author=green-arrow "Code") [⚠️](https://github.com/paypal/downshift/commits?author=green-arrow "Tests") | [<img src="https://avatars0.githubusercontent.com/u/13774309?v=4" width="100px;"/><br /><sub><b>Arthur Denner</b></sub>](https://github.com/arthurdenner)<br />[💻](https://github.com/paypal/downshift/commits?author=arthurdenner "Code") |
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 

src/utils.js

@@ -113,7 +113,7 @@ function scrollIntoView(node, rootNode) {
  * @return {Boolean} whether the parent is the child or the child is in the parent
  */
 function isOrContainsNode(parent, child) {
-  return parent === child || parent.contains(child)
+  return parent === child || (parent.contains && parent.contains(child))
 }
 
 /**