[Autocomplete] clearOnEscape causes exit from fullscreen

[sclavijo93]

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

When I'm testing the clearOnEscape variation of the Autocomplete component on docs and pressing escape causes the browser to exit from fullscreen

Expected Behavior 🤔

The browser state should not be affected by pressing escape

Steps to Reproduce 🕹

• Codesandox
• Select any option
• Press escape to clear the value

Your Environment 🌎

Tech	Version
Material-UI	current master
Browser	Opera v63.0.3368.107
OS	macOs Mojave 10.14.6

[oliviertassinari]

How do you trigger the "fullscreen" mode?

Browser | Opera v63.0.3368.107

Notice that we have no official support for this browser.

[oliviertassinari]

What do you think of a fix like this one?

diff --git a/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js b/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js
index bc02f10f1..2df5b1c6f 100644
--- a/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js
+++ b/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js
@@ -513,9 +513,15 @@ export default function useAutocomplete(props) {
         break;
       case 'Escape':
         if (popupOpen) {
+          // Avoid Opera to exit fullscreen mode.
+          event.preventDefault();
+          // Avoid the Modal to handle the event.
           event.stopPropagation();
           handleClose(event);
-        } else if (clearOnEscape) {
+        } else if (clearOnEscape && inputValue !== '') {
+          // Avoid Opera to exit fullscreen mode.
+          event.preventDefault();
+          // Avoid the Modal to handle the event.
           event.stopPropagation();
           handleClear(event);
         }

[ssliman]

@oliviertassinari working on this