Users: Add JS confirmation if user profile has unsaved changes.

Add a confirmation dialog when users navigate away from the user profile screen if they have unsaved changes to prevent data loss.

Props ashokrane, karlijnbk, diedeexterkate, jwgoedert, joedolson, swissspidy, afercia.
Fixes #40493.
Built from https://develop.svn.wordpress.org/trunk@58137


git-svn-id: http://core.svn.wordpress.org/trunk@57602 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/user-profile.js

@@ -5,6 +5,7 @@
 /* global ajaxurl, pwsL10n, userProfileL10n */
 (function($) {
 	var updateLock = false,
+		isSubmitting = false,
 		__ = wp.i18n.__,
 		$pass1Row,
 		$pass1,
@@ -15,6 +16,8 @@
 		$submitButtons,
 		$submitButton,
 		currentPass,
+		$form,
+		originalFormContent,
 		$passwordWrapper;
 
 	function generatePassword() {
@@ -454,6 +457,12 @@
 
 		bindPasswordForm();
 		bindPasswordResetLink();
+		$submitButtons.on( 'click', function() {
+			isSubmitting = true;
+		});
+
+		$form = $( '#your-profile, #createuser' );
+		originalFormContent = $form.serialize();
 	});
 
 	$( '#destroy-sessions' ).on( 'click', function( e ) {
@@ -481,7 +490,10 @@
 		if ( true === updateLock ) {
 			return __( 'Your new password has not been saved.' );
 		}
-	} );
+		if ( originalFormContent !== $form.serialize() && ! isSubmitting ) {
+			return __( 'Changes that you made may not be saved.' );
+		}
+	});
 
 	/*
 	 * We need to generate a password as soon as the Reset Password page is loaded,

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-alpha-58136';
+$wp_version = '6.6-alpha-58137';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.