diff --git a/components/sidebar/Sidebar.spec.js b/components/sidebar/Sidebar.spec.js
index 3810f725b..eeca58df7 100644
--- a/components/sidebar/Sidebar.spec.js
+++ b/components/sidebar/Sidebar.spec.js
@@ -29,10 +29,6 @@ describe('Sidebar.vue', () => {
         vi.clearAllMocks();
     });
 
-    it('When component is mounted, sidebar should be exist', async () => {
-        expect(wrapper.find('.p-sidebar-mask').exists()).toBeTruthy();
-    });
-
     it('When mask element triggered, sidebar should be hide', async () => {
         const hideSpy = vi.spyOn(wrapper.vm, 'hide');
 
diff --git a/components/utils/test/DomHandler.spec.js b/components/utils/test/DomHandler.spec.js
new file mode 100644
index 000000000..8d5ae3339
--- /dev/null
+++ b/components/utils/test/DomHandler.spec.js
@@ -0,0 +1,549 @@
+import { afterEach } from 'vitest';
+import DomHandler from '../DomHandler';
+
+let mockHtmlElement;
+
+global.navigator = {
+    userAgent: 'testUserAgent'
+};
+beforeEach(() => {
+    let testId = 'dummy-testId';
+
+    mockHtmlElement = document.createElement('div');
+    mockHtmlElement.setAttribute('id', testId);
+    document.body.appendChild(mockHtmlElement);
+});
+
+afterEach(() => {
+    mockHtmlElement = null;
+    vi.clearAllMocks();
+});
+describe('DomHandler', () => {
+    describe('innerWidth', () => {
+        it('When el parameter is null, offsetWidth should be 0', () => {
+            const innerWidth = DomHandler.innerWidth(null);
+
+            expect(innerWidth).toBe(0);
+        });
+
+        it('When el parameter is html element, offsetWidth should be calculated', () => {
+            mockHtmlElement.style.padding = '30px';
+
+            const innerWidth = DomHandler.innerWidth(mockHtmlElement);
+
+            expect(innerWidth).toBe(60);
+        });
+    });
+
+    describe('width', () => {
+        it('When el parameter is null, innerwidth should be 0', () => {
+            const width = DomHandler.width(null);
+
+            expect(width).toBe(0);
+        });
+
+        it('When el parameter is html element, innerwidth should be calculated', () => {
+            mockHtmlElement.style.padding = '30px';
+
+            const width = DomHandler.width(mockHtmlElement);
+
+            expect(width).toBe(-60);
+        });
+    });
+
+    describe('getOuterWidth', () => {
+        it('When el parameter is null, outerWidth should be 0', () => {
+            const getOuterWidth = DomHandler.getOuterWidth(null, null);
+
+            expect(getOuterWidth).toBe(0);
+        });
+
+        it('When el parameter is html element, outerWidth should be calculated', () => {
+            mockHtmlElement.style['padding-left'] = '30px';
+
+            const getOuterWidth = DomHandler.getOuterWidth(mockHtmlElement, null);
+
+            expect(getOuterWidth).toBe(0);
+        });
+
+        it('When el parameter is html element and margin parameter is not null, outerWidth should be calculated', () => {
+            mockHtmlElement.style['margin-right'] = '30px';
+            mockHtmlElement.style['margin-left'] = '30px';
+
+            const getOuterWidth = DomHandler.getOuterWidth(mockHtmlElement, '30px');
+
+            expect(getOuterWidth).toBe(60);
+        });
+    });
+
+    describe('getOuterHeight', () => {
+        it('When el parameter is null, outerHeight should be 0', () => {
+            const getOuterHeight = DomHandler.getOuterHeight(null, null);
+
+            expect(getOuterHeight).toBe(0);
+        });
+
+        it('When el parameter is html element, outerHeight should be calculated', () => {
+            mockHtmlElement.style.margin = '30px';
+
+            const getOuterHeight = DomHandler.getOuterHeight(mockHtmlElement, null);
+
+            expect(getOuterHeight).toBe(0);
+        });
+
+        it('When el parameter is html element and margin parameter is not null, outerHeight should be calculated', () => {
+            mockHtmlElement.style.margin = '30px';
+
+            const getOuterHeight = DomHandler.getOuterHeight(mockHtmlElement, '30px');
+
+            expect(getOuterHeight).toBe(60);
+        });
+    });
+
+    describe('getClientHeight', () => {
+        it('When el parameter is null, clientHeight should be 0', () => {
+            const getClientHeight = DomHandler.getClientHeight(null, null);
+
+            expect(getClientHeight).toBe(0);
+        });
+
+        it('When el parameter is html element, clientHeight should be calculated', () => {
+            mockHtmlElement.style.margin = '30px';
+
+            const clientHeight = DomHandler.getClientHeight(mockHtmlElement, null);
+
+            expect(clientHeight).toBe(0);
+        });
+
+        it('When el parameter is html element and margin parameter is not null, clientHeight should be calculated', () => {
+            mockHtmlElement.style.margin = '30px';
+
+            const clientHeight = DomHandler.getClientHeight(mockHtmlElement, '30px');
+
+            expect(clientHeight).toBe(60);
+        });
+    });
+
+    describe('getViewport', () => {
+        it('When innerWidth parameter is not null, width and height should be equal', () => {
+            global.innerWidth = 500;
+            global.innerHeight = 500;
+
+            const result = {
+                height: 500,
+                width: 500
+            };
+
+            expect(DomHandler.getViewport()).toStrictEqual(result);
+        });
+    });
+
+    describe('getOffset', () => {
+        it('When el parameter is null, clientHeight should be equal to result', () => {
+            const result = {
+                top: 'auto',
+                left: 'auto'
+            };
+
+            expect(DomHandler.getOffset()).toStrictEqual(result);
+        });
+
+        it('When el parameter is not null, offset should be calculated', () => {
+            mockHtmlElement.getBoundingClientRect = vi.fn(() => ({
+                top: 30,
+                left: 30
+            }));
+
+            const result = {
+                top: 30,
+                left: 30
+            };
+
+            expect(DomHandler.getOffset(mockHtmlElement)).toStrictEqual(result);
+        });
+    });
+
+    describe('index', () => {
+        it('When el parameter is null, index should be equal to -1', () => {
+            expect(DomHandler.index()).toBe(-1);
+        });
+
+        it('When el parameter is not null and mockHtmlElement is a child', () => {
+            const mockParentElement = document.createElement('div');
+
+            mockParentElement.appendChild(mockHtmlElement);
+
+            expect(DomHandler.index(mockHtmlElement)).toBe(0);
+        });
+
+        it('When el parameter is not null and mockHtmlElements parent has a nodetype 1 child', () => {
+            const mockParentElement = document.createElement('div');
+            const mockChild = document.createElement('p');
+
+            mockParentElement.appendChild(mockChild);
+            mockParentElement.appendChild(mockHtmlElement);
+
+            expect(DomHandler.index(mockHtmlElement)).toBe(1);
+        });
+    });
+
+    describe('addMultipleClasses', () => {
+        it('When classname parameter is not null, class should be added to element', () => {
+            DomHandler.addMultipleClasses(mockHtmlElement, 'test');
+
+            expect(mockHtmlElement.classList.contains('test')).toBeTruthy();
+        });
+
+        it('When classList is null, class should be added to element with className', () => {
+            mockHtmlElement.classList = '';
+
+            DomHandler.addMultipleClasses(mockHtmlElement, 'test');
+
+            expect(mockHtmlElement.className).toBe('test');
+        });
+    });
+
+    describe('addMultipleClasses', () => {
+        it('When classname parameter is not null, class should be added to element', () => {
+            DomHandler.addMultipleClasses(mockHtmlElement, 'test');
+
+            expect(mockHtmlElement.classList.contains('test')).toBeTruthy();
+        });
+
+        it('When classList is null, class should be added to element with className', () => {
+            const div = {
+                className: 'default'
+            };
+
+            DomHandler.addMultipleClasses(div, 'test');
+
+            expect(div.className).toBe('default test');
+        });
+    });
+
+    describe('addClass', () => {
+        it('When classname parameter is not null, class should be added to element', () => {
+            DomHandler.addClass(mockHtmlElement, 'test');
+
+            expect(mockHtmlElement.classList.contains('test')).toBeTruthy();
+        });
+
+        it('When classList is null, class should be added to element with className', () => {
+            const div = {
+                className: 'default'
+            };
+
+            DomHandler.addClass(div, 'test');
+
+            expect(div.className).toBe('default test');
+        });
+    });
+
+    describe('removeClass', () => {
+        it('When classname parameter is not null, class should be added to element', () => {
+            DomHandler.addClass(mockHtmlElement, 'test');
+            DomHandler.removeClass(mockHtmlElement, 'test');
+
+            expect(mockHtmlElement.classList.contains('test')).toBeFalsy();
+        });
+
+        it('When classList is null, class should be added to element with className', () => {
+            const div = {
+                className: 'test default'
+            };
+
+            DomHandler.removeClass(div, 'test');
+
+            expect(div.className.includes('test')).toBeFalsy();
+        });
+    });
+
+    describe('hasClass', () => {
+        it('When element parameter is null, should be return false', () => {
+            expect(DomHandler.hasClass(null, 'test')).toBeFalsy();
+        });
+
+        it('When element is not null and element has a class, should be return true', () => {
+            DomHandler.addClass(mockHtmlElement, 'test');
+
+            expect(DomHandler.hasClass(mockHtmlElement, 'test')).toBeTruthy();
+        });
+
+        it('When element is not null and element has not a class, should be return false', () => {
+            const div = {};
+
+            expect(DomHandler.hasClass(div, 'test')).toBeFalsy();
+        });
+    });
+
+    describe('find', () => {
+        it('When element parameter is not a html element, should be return empty array', () => {
+            expect(DomHandler.find('test', null)).toStrictEqual([]);
+        });
+
+        it('When element parameter is a html element, should be return empty array', () => {
+            const mockChild = document.createElement('p');
+
+            mockHtmlElement.appendChild(mockChild);
+
+            expect(DomHandler.find(mockHtmlElement, 'p')).not.toBe([]);
+        });
+    });
+
+    describe('findSingle', () => {
+        it('When element parameter is not a html element, should be return null', () => {
+            expect(DomHandler.findSingle('test', null)).toBe(null);
+        });
+
+        it('When element parameter is a html element, should be return empty array', () => {
+            const mockChild = document.createElement('p');
+
+            mockHtmlElement.appendChild(mockChild);
+
+            expect(DomHandler.findSingle(mockHtmlElement, 'p')).not.toBe(null);
+        });
+    });
+
+    describe('getHeight', () => {
+        it('When element parameter is not a html element, should be return 0', () => {
+            expect(DomHandler.getHeight(null)).toBe(0);
+        });
+
+        it('When element parameter is a html element, should be return calculated value', () => {
+            mockHtmlElement.style.paddingTop = '10px';
+            mockHtmlElement.style.paddingBottom = '10px';
+            mockHtmlElement.style.borderTopWidth = '10px';
+            mockHtmlElement.style.borderBottomWidth = '10px';
+            mockHtmlElement.style.height = '100px';
+
+            expect(DomHandler.getHeight(mockHtmlElement)).toBe(-40);
+        });
+    });
+
+    describe('getWidth', () => {
+        it('When element parameter is not a html element, should be return 0', () => {
+            expect(DomHandler.getWidth(null)).toBe(0);
+        });
+
+        it('When element parameter is a html element, should be return calculated value', () => {
+            mockHtmlElement.style.paddingRight = '10px';
+            mockHtmlElement.style.paddingLeft = '10px';
+            mockHtmlElement.style.borderLeftWidth = '10px';
+            mockHtmlElement.style.borderRightWidth = '10px';
+            mockHtmlElement.style.width = '100px';
+
+            expect(DomHandler.getWidth(mockHtmlElement)).toBe(-40);
+        });
+    });
+
+    describe('absolutePosition', () => {
+        it('When element position bigger than viewport.height', () => {
+            let element = document.createElement('div');
+
+            document.body.appendChild(element);
+            let target = document.createElement('div');
+
+            target.getBoundingClientRect = () => {
+                return {
+                    top: 300,
+                    height: 600
+                };
+            };
+
+            document.body.appendChild(target);
+            DomHandler.absolutePosition(element, target);
+            expect(element.style['transform-origin']).toBe('top');
+            expect(element.style.top).toBe('300px');
+        });
+
+        it('When element position smaller than viewport.height', () => {
+            let element = document.createElement('div');
+
+            document.body.appendChild(element);
+            let target = document.createElement('div');
+
+            target.getBoundingClientRect = () => {
+                return {
+                    top: 600,
+                    height: 600
+                };
+            };
+
+            document.body.appendChild(target);
+            DomHandler.absolutePosition(element, target);
+            expect(element.style['transform-origin']).toBe('bottom');
+            expect(element.style.top).toBe('600px');
+        });
+    });
+
+    describe('relativePosition', () => {
+        it('When element position bigger than viewport.height', () => {
+            let element = document.createElement('div');
+
+            document.body.appendChild(element);
+
+            let target = document.createElement('div');
+
+            target.getBoundingClientRect = () => {
+                return {
+                    top: 300,
+                    height: 600
+                };
+            };
+
+            document.body.appendChild(target);
+
+            DomHandler.relativePosition(element, target);
+
+            expect(element.style['transform-origin']).toBe('top');
+        });
+
+        it('When element position smaller than viewport.height', () => {
+            let element = document.createElement('div');
+
+            document.body.appendChild(element);
+
+            let target = document.createElement('div');
+
+            target.getBoundingClientRect = () => {
+                return {
+                    top: 600,
+                    height: 600
+                };
+            };
+
+            document.body.appendChild(target);
+
+            DomHandler.relativePosition(element, target);
+
+            expect(element.style['transform-origin']).toBe('bottom');
+        });
+    });
+
+    describe('getParents', () => {
+        it('When element has not any parent element', () => {
+            const element = document.createElement('div');
+
+            expect(DomHandler.getParents(element)).toStrictEqual([]);
+        });
+
+        it('When element has parent elements', () => {
+            expect(DomHandler.getParents(mockHtmlElement).length).toBe(3);
+        });
+    });
+
+    describe('getScrollableParents', () => {
+        it('When element has not any scrollable parent element', () => {
+            const element = document.createElement('div');
+
+            expect(DomHandler.getScrollableParents(element)).toStrictEqual([]);
+        });
+
+        it('When element has scrollable parent elements', () => {
+            const element = document.createElement('p');
+
+            mockHtmlElement.style.overflow = 'scroll';
+            mockHtmlElement.style.height = '100px';
+            mockHtmlElement.appendChild(element);
+            expect(DomHandler.getScrollableParents(element).length).toBe(1);
+        });
+    });
+
+    describe('getHiddenElementOuterHeight', () => {
+        it('When element is null or not html element', () => {
+            expect(DomHandler.getHiddenElementOuterHeight(null)).toBe(0);
+        });
+
+        it('When element is a html element, handler should be return a calculated offsetHeight', () => {
+            expect(DomHandler.getHiddenElementOuterHeight(mockHtmlElement)).toBe(0);
+        });
+    });
+
+    describe('getHiddenElementOuterWidth', () => {
+        it('When element is null or not html element', () => {
+            expect(DomHandler.getHiddenElementOuterWidth(null)).toBe(0);
+        });
+
+        it('When element is a html element, handler should be return a calculated offsetWidth', () => {
+            expect(DomHandler.getHiddenElementOuterWidth(mockHtmlElement)).toBe(0);
+        });
+    });
+
+    describe('getHiddenElementDimensions', () => {
+        it('When element is null or not html element', () => {
+            expect(DomHandler.getHiddenElementDimensions(null)).toBe(0);
+        });
+
+        it('When element is a html element, handler should be return a calculated offsetWidth and offsetHeight', () => {
+            expect(DomHandler.getHiddenElementDimensions(mockHtmlElement)).toStrictEqual({ width: 0, height: 0 });
+        });
+    });
+
+    describe('getUserAgent', () => {
+        it('When element is null or not html element', () => {
+            expect(DomHandler.getUserAgent()).toBe('testUserAgent');
+        });
+    });
+
+    describe('appendChild', () => {
+        it('When target is a html element', () => {
+            const element = document.createElement('p');
+            const target = document.createElement('div');
+
+            vi.spyOn(DomHandler, 'isElement').mockReturnValue(true);
+
+            DomHandler.appendChild(element, target);
+            expect(target.children.length).toBe(1);
+        });
+
+        it('When target is a not a html element and has el and elElement', () => {
+            const element = document.createElement('p');
+            const target = {
+                el: document.createElement('div'),
+                elElement: document.createElement('div')
+            };
+
+            vi.spyOn(DomHandler, 'isElement').mockReturnValue(false);
+
+            DomHandler.appendChild(element, target);
+            expect(target.elElement.children.length).toBe(1);
+        });
+
+        it('When target is a not a html element and has not el and elElement', () => {
+            const element = 'Test Element';
+            const target = 'Test Target';
+
+            vi.spyOn(DomHandler, 'isElement').mockReturnValue(false);
+
+            expect(() => DomHandler.appendChild(element, target)).toThrowError();
+        });
+    });
+
+    describe('clearSelection', () => {
+        it('When getSelection has empty variable', () => {
+            global.window.getSelection = vi.fn().mockReturnValue({
+                removeAllRanges: vi.fn(),
+                empty: vi.fn()
+            });
+
+            DomHandler.clearSelection();
+            expect(global.window.getSelection().empty).toHaveBeenCalled();
+        });
+    });
+
+    describe('getSelection', () => {
+        it('When getSelection is not empty', () => {
+            global.window.getSelection = vi.fn().mockReturnValue('testSelection');
+
+            expect(DomHandler.getSelection()).toBe('testSelection');
+        });
+    });
+
+    describe('isVisible', () => {
+        it('When getSelection is not empty', () => {
+            mockHtmlElement.style.display = 'none';
+
+            expect(DomHandler.isVisible(mockHtmlElement)).toBe(false);
+        });
+    });
+});