[Autocomplete] blurOnSelect consistency

[vince1995]

• 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 a Autocomplete has blurOnSelect it doesn't blur when an option is selected via keyboard (arrows and return). The popup closes.

Expected Behavior 🤔

It should also blur.

Steps to Reproduce 🕹

Go to https://codesandbox.io/s/material-demo-smkqh and select an option with the keyboard.

[oliviertassinari]

@vince1995 The prop was introduced for the mobile experience. It's frequent to want to hide the virtual keyboard after the selection of an option. We have never considered the use case on a desktop with the keyboard. Could you share more on why you want to implement such behavior?

Without more information on the motivation for the end-users of the component, I would be in favor of denying the request, and implement the following breaking change:

-blurOnSelect?: 'touch' | 'mouse' | true | false;
+blurOnSelect?: 'touch' | false;

[rassie]

I've stumbled upon this too, even though my use case is probably a bit different.

I want to enable user to change a setting quickly from predefined options. If the user were to use a keyboard, he'd focus the input field, type something in, select an option with arrows and confirm with return. Now the value of the selected entry is in the text input field and the cursor is positioned behind the text, so that selecting another entry is not possible without deleting the value manually. I would like to have the ability to start typing again right away to select a new option.

With a mouse, the input field would blur and with selectOnFocus set, focusing the field allows typing again. So basically, I'm missing a selectOnSelect options (select text on option selection), but until that's available, a consistent blurOnSelect would help quite a lot.

[vince1995]

Because we expect that if a value is selected the user finished his input. It would be confusing if the input is still focused after the selection.

And it's consistent to mobile device logic.

[oliviertassinari]

Ok, thanks for these insights. I think that we can move forward with consistency. @vince1995 Do you want to work on a pull request? :)

diff --git a/docs/src/pages/components/autocomplete/Playground.tsx b/docs/src/pages/components/autocomplete/Playground.tsx
index e7d99762b..aab11932d 100644
--- a/docs/src/pages/components/autocomplete/Playground.tsx
+++ b/docs/src/pages/components/autocomplete/Playground.tsx
@@ -104,6 +104,12 @@ export default function Playground() {
         disablePortal
         renderInput={params => <TextField {...params} label="disablePortal" margin="normal" />}
       />
+      <Autocomplete
+        {...defaultProps}
+        id="blur-on-select"
+        blurOnSelect
+        renderInput={params => <TextField {...params} label="blurOnSelect" margin="normal" />}
+      />
     </div>
   );
 }
diff --git a/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js b/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js
index f915e3ca0..53d5234a2 100644
--- a/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js
+++ b/packages/material-ui-lab/src/useAutocomplete/useAutocomplete.js
@@ -451,6 +451,8 @@ export default function useAutocomplete(props) {
     setValue(newValue);
   };

+  const isTouch = React.useRef(false);
+
   const selectNewValue = (event, option, reasonProp = 'select-option', origin = 'options') => {
     let reason = reasonProp;
     let newValue = option;
@@ -489,6 +491,14 @@ export default function useAutocomplete(props) {
     if (!disableCloseOnSelect) {
       handleClose(event, reason);
     }
+
+    if (
+      blurOnSelect === true ||
+      (blurOnSelect === 'touch' && isTouch.current) ||
+      (blurOnSelect === 'mouse' && !isTouch.current)
+    ) {
+      inputRef.current.blur();
+    }
   };

   function validTagIndex(index, direction) {
@@ -736,8 +746,6 @@ export default function useAutocomplete(props) {
     setHighlightedIndex(index, 'mouse');
   };

-  const isTouch = React.useRef(false);
-
   const handleOptionTouchStart = () => {
     isTouch.current = true;
   };
@@ -745,15 +753,6 @@ export default function useAutocomplete(props) {
   const handleOptionClick = event => {
     const index = Number(event.currentTarget.getAttribute('data-option-index'));
     selectNewValue(event, filteredOptions[index], 'select-option');
-
-    if (
-      blurOnSelect === true ||
-      (blurOnSelect === 'touch' && isTouch.current) ||
-      (blurOnSelect === 'mouse' && !isTouch.current)
-    ) {
-      inputRef.current.blur();
-    }
-
     isTouch.current = false;
   };

[alexbarkin]

Hey, @oliviertassinari I would be happy to take this one on, is it still available?

[oliviertassinari]

@alexbarkin Definitely :)