From f8300168a6188ab53c0723d3a1eb8813ceb46bf3 Mon Sep 17 00:00:00 2001
From: arabasso <arabasso@yahoo.com.br>
Date: Thu, 26 Jan 2023 11:02:17 -0300
Subject: [PATCH] Add accent insensitive filtering support.

---
 dist/js/bootstrap-multiselect.js       | 6 ++++++
 types/bootstrap-multiselect/index.d.ts | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/dist/js/bootstrap-multiselect.js b/dist/js/bootstrap-multiselect.js
index 7d88d8c4..ec747458 100644
--- a/dist/js/bootstrap-multiselect.js
+++ b/dist/js/bootstrap-multiselect.js
@@ -429,6 +429,7 @@
             selectAllJustVisible: true,
             enableFiltering: false,
             enableCaseInsensitiveFiltering: false,
+            enableAccentInsensitiveFiltering: false,
             enableFullValueFiltering: false,
             enableClickableOptGroups: false,
             enableCollapsibleOptGroups: false,
@@ -1260,6 +1261,11 @@
                                             this.query = this.query.toLowerCase();
                                         }
 
+                                        if (this.options.enableAccentInsensitiveFiltering) {
+                                            filterCandidate = filterCandidate.normalize("NFD").replace(/[\u0300-\u036f]/g, "");
+                                            this.query = this.query.normalize("NFD").replace(/[\u0300-\u036f]/g, "");
+                                        }
+
                                         if (this.options.enableFullValueFiltering && this.options.filterBehavior !== 'both') {
                                             var valueToMatch = filterCandidate.trim().substring(0, this.query.length);
                                             if (this.query.indexOf(valueToMatch) > -1) {
diff --git a/types/bootstrap-multiselect/index.d.ts b/types/bootstrap-multiselect/index.d.ts
index 292a3854..2d8f6add 100644
--- a/types/bootstrap-multiselect/index.d.ts
+++ b/types/bootstrap-multiselect/index.d.ts
@@ -325,6 +325,12 @@ interface MultiSelectOptions {
      */
     enableCaseInsensitiveFiltering?: boolean;
 
+    /**
+     * The filter as configured above will use accent sensitive filtering, 
+     * by setting enableAccentInsensitiveFiltering to true this behavior can be changed to use accent insensitive filtering.
+     */
+    enableAccentInsensitiveFiltering?: boolean;
+
     /**
      * Set to true to enable full value filtering, that is all options are shown where the query is a prefix of. 
      */