select dropdown numeric values filter fix

projects/swimlane/ngx-ui/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Fix (`ngx-date-range-picker`): Preset values now retain their relative expressions when cancel is clicked, instead of being converted to timestamps
 - Fix (`ngx-date-range-picker`): Fix highlight the date for given `selectedRange` values.
+- Fix (`ngx-select`): Fix filtering of numeric option values.
 
 ## 50.1.3 (2025-09-23)
 

projects/swimlane/ngx-ui/src/lib/components/select/contains-filter.util.spec.ts

@@ -41,8 +41,43 @@ describe('containsFilter', () => {
     expect(res).toBeTruthy();
   });
 
-  it('should be undefined if value is not string or object', () => {
-    const res = containsFilter(1, '1', {});
-    expect(res).toBeUndefined();
+  it('should convert number to string and return true when filter matches', () => {
+    const res = containsFilter(123, '123', {});
+    expect(res).toBeTruthy();
+  });
+
+  it('should convert number to string and return true when filter matches partially', () => {
+    const res = containsFilter(123, '12', {});
+    expect(res).toBeTruthy();
+  });
+
+  it('should convert number to string and return false when filter does not match', () => {
+    const res = containsFilter(123, '456', {});
+    expect(res).toBeFalsy();
+  });
+
+  it('should handle number filtering with case sensitive option', () => {
+    const res = containsFilter(123, '123', { filterCaseSensitive: true });
+    expect(res).toBeTruthy();
+  });
+
+  it('should handle alphanumeric string filtering with numbers', () => {
+    const res = containsFilter('ABC123', '123', {});
+    expect(res).toBeTruthy();
+  });
+
+  it('should handle alphanumeric string filtering with partial numbers', () => {
+    const res = containsFilter('ABC123', '12', {});
+    expect(res).toBeTruthy();
+  });
+
+  it('should handle alphanumeric string filtering with letters and numbers', () => {
+    const res = containsFilter('ABC123', 'BC1', {});
+    expect(res).toBeTruthy();
+  });
+
+  it('should return false for alphanumeric string when filter does not match', () => {
+    const res = containsFilter('ABC123', 'XYZ', {});
+    expect(res).toBeFalsy();
   });
 });

projects/swimlane/ngx-ui/src/lib/components/select/contains-filter.util.ts

@@ -9,12 +9,10 @@ export function containsFilter(
   if (value === undefined || value === null || depth > 2) {
     return false;
   }
-
+  if (typeof value === 'number') {
+    value = String(value);
+  }
   if (typeof value === 'string') {
-    if (!isNaN(+value)) {
-      return value === keyword;
-    }
-
     const escapedKeyword = escapeRegExp(keyword);
     // eslint-disable-next-line
     const idx = options.filterCaseSensitive ? value.indexOf(keyword) : value.search(new RegExp(escapedKeyword, 'i'));