Completer.js: Trigger autosubmit on focus out for manual input if the not instrumented

Ensure the form submits automatically when:

- The completer is not part of term input or instrumented
- The completer has the autosubmit dataset attribute
- No suggestion is explicitly selected on manual input

Author: raviks789

asset/js/widget/Completer.js

@@ -6,6 +6,7 @@ define(["../notjQuery"], function ($) {
         constructor(input, instrumented = false) {
             this.input = input;
             this.instrumented = instrumented;
+            this.hasNotBeenCompleted = false; // Flag to identify if the input has been completed at least once.
             this.selectionStartInput = null;
             this.selectionActive = false;
             this.mouseSelectionActive = false;
@@ -268,6 +269,7 @@ define(["../notjQuery"], function ($) {
 
         complete(input, value, data) {
             $(input).focus({ scripted: true });
+            this.hasNotBeenCompleted = false;
 
             if (this.instrumented) {
                 if (! Object.keys(data).length) {
@@ -476,7 +478,7 @@ define(["../notjQuery"], function ($) {
         }
 
         onFocusOut(event) {
-            if (this.completedInput === null) {
+            if (this.completedInput === null && (this.instrumented || ! this.hasNotBeenCompleted)) {
                 // If there are multiple instances of Completer bound to the same suggestion container
                 // all of them try to handle the event. Though, only one of them is responsible and
                 // that's the one which has a completed input set.
@@ -492,12 +494,20 @@ define(["../notjQuery"], function ($) {
                     && ! this.termSuggestions.contains(document.activeElement)
                 ) {
                     // Hide the suggestions if the user doesn't navigate them
-                    if (input !== completedInput) {
+                if (completedInput !== null && input !== completedInput) {
                         // Restore input if a suggestion lost focus
                         this.suggest(completedInput, this.completedValue);
                     }
 
                     this.hideSuggestions();
+
+                    // Autosubmit when the user leaves without selecting a suggestion on manual input.
+                    // Only for non-instrumented mode — instrumented inputs (e.g. TermInput) handle
+                    // autosubmit themselves via BaseInput.autoSubmit() with proper term data.
+                    if (! this.instrumented && this.shouldAutoSubmit()) {
+                        this.hasNotBeenCompleted = false;
+                        $(input.form).trigger('submit', { submittedBy: input });
+                    }
                 }
             }, 250);
         }
@@ -712,6 +722,7 @@ define(["../notjQuery"], function ($) {
 
         onInput(event) {
             let input = event.target;
+            this.hasNotBeenCompleted = true;
 
             if (input.minLength > 0 && input.value.length < input.minLength) {
                 return;