refactor(Tabs): used ResizeObserver to detect tab width changes

jest.setup.ts

@@ -1 +1,7 @@
 import '@testing-library/jest-dom';
+
+import ResizeObserver from './__mocks__/ResizeObserver';
+
+jest.mock('resize-observer-polyfill', () => {
+  return ResizeObserver;
+});

src/components/BasicSelectDeprecated/__tests__/BasicSelect.test.tsx

@@ -1,7 +1,6 @@
 import * as React from 'react';
 import { act, fireEvent, render, RenderResult, screen } from '@testing-library/react';
 
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cnSelect } from '../../SelectComponentsDeprecated/cnSelect';
 import { cnSelectItem } from '../../SelectComponentsDeprecated/SelectItem/SelectItem';
 import { BasicSelect, SimpleSelectProps } from '../BasicSelect';
@@ -14,10 +13,6 @@ type SelectOption = {
 const animationDuration = 200;
 const testId = 'BasicSelect';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const items = [
   { label: 'Neptunium', value: 'Neptunium' },
   { label: 'Plutonium', value: 'Plutonium' },

src/components/Combobox/__tests__/Combobox.test.tsx

@@ -2,7 +2,6 @@ import * as React from 'react';
 import { act, fireEvent, render, RenderResult, screen } from '@testing-library/react';
 
 import { groups, items } from '../__mocks__/data.mock';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cn } from '../../../utils/bem';
 import { cnSelect } from '../../SelectComponents/cnSelect';
 import { cnSelectGroupLabel } from '../../SelectComponents/SelectGroupLabel/SelectGroupLabel';
@@ -11,10 +10,6 @@ import { cnSelectValueTag } from '../../SelectComponents/SelectValueTag/SelectVa
 import { Combobox, ComboboxProps, defaultGetItemLabel } from '../Combobox';
 import { DefaultGroup, DefaultItem } from '../helpers';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const animationDuration = 200;
 const testId = 'Combobox';
 const cnRenderValue = cn('RenderValue');

src/components/ComboboxDeprecated/__tests__/Combobox.test.tsx

@@ -2,15 +2,10 @@ import React, { useState } from 'react';
 import { act, fireEvent, render, screen } from '@testing-library/react';
 
 import { simpleItems } from '../__mocks__/data.mock';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cnSelect } from '../../SelectComponentsDeprecated/cnSelect';
 import { cnSelectItem } from '../../SelectComponentsDeprecated/SelectItem/SelectItem';
 import { Combobox } from '../Combobox';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const testId = 'Combobox';
 const animationDuration = 200;
 

src/components/ContextMenu/__tests__/ContextMenu.test.tsx

@@ -2,18 +2,13 @@ import React from 'react';
 import { fireEvent, render, screen } from '@testing-library/react';
 
 import { exampleItems as items, groups, Item } from '../__mocks__/mock.data';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cnText } from '../../Text/Text';
 import { ContextMenu } from '../ContextMenu';
 import { cnContextMenuGroupHeader } from '../ContextMenuGroupHeader/ContextMenuGroupHeader';
 import { cnContextMenuItem } from '../ContextMenuItem/ContextMenuItem';
 import { cnContextMenuLevel } from '../ContextMenuLevel/ContextMenuLevel';
 import { ContextMenuProps } from '../helpers';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const testId = 'ContextMenu';
 const additionalClass = 'additionalClass';
 

src/components/MultiComboboxDeprecated/__tests__/MultiCombobox.test.tsx

@@ -1,16 +1,11 @@
 import React, { useState } from 'react';
 import { act, fireEvent, render, screen } from '@testing-library/react';
 
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { simpleItems } from '../../ComboboxDeprecated/__mocks__/data.mock';
 import { cnSelect } from '../../SelectComponentsDeprecated/cnSelect';
 import { cnSelectItem } from '../../SelectComponentsDeprecated/SelectItem/SelectItem';
 import { MultiCombobox } from '../MultiCombobox';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const testId = 'MultiCombobox';
 const animationDuration = 200;
 

src/components/Select/__tests__/Select.test.tsx

@@ -2,7 +2,6 @@ import * as React from 'react';
 import { act, fireEvent, render, RenderResult, screen } from '@testing-library/react';
 
 import { groups, items } from '../__mocks__/data.mock';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cn } from '../../../utils/bem';
 import { cnSelect } from '../../SelectComponents/cnSelect';
 import { cnSelectGroupLabel } from '../../SelectComponents/SelectGroupLabel/SelectGroupLabel';
@@ -14,10 +13,6 @@ const testId = 'Select';
 const cnRenderValue = cn('RenderValue');
 const cnRenderItem = cn('RenderItem');
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const defaultProps: SelectProps = {
   items,
   groups,

src/components/Table/__tests__/Table.test.tsx

@@ -1,13 +1,8 @@
 import * as React from 'react';
 import { render, screen } from '@testing-library/react';
 
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { Props, Table } from '../Table';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const rows = [
   {
     id: 'row1',

src/components/Tabs/Tabs.css

@@ -40,46 +40,14 @@
   }
 
   &-RunningLine {
-    left: -1px;
-    width: 1px;
-    border-radius: 1px 0 0 0;
-    transition: opacity 0.2s, transform 0.25s;
-    transform: translateX(var(--tabOffsetLeft, 0));
-
-    &,
-    &::before,
-    &::after {
-      position: absolute;
-      bottom: 0;
-      height: 2px;
-      background-color: var(--color-bg-brand);
-      transform-origin: left center;
-    }
-
-    &::before {
-      content: '';
-      left: 1px;
-      width: var(--tabsWidth);
-      transition: transform 0.25s;
-      transform: scaleX(var(--tabRatio, 0.0001));
-    }
-
-    &::after {
-      content: '';
-      left: 1px;
-      width: 1px;
-      border-radius: 0 1px 0 0;
-      transition: transform 0.25s;
-      transform: translateX(var(--tabWidth));
-    }
-
-    &_withOutValue {
-      opacity: 0;
-    }
-  }
-
-  &-WrapperRunningLine {
-    overflow: hidden;
-    width: 100%;
+    position: absolute;
+    left: 0;
+    bottom: 0;
+    width: var(--tabSize);
+    height: 2px;
+    background-color: var(--color-bg-brand);
+    transition: transform 0.25s, width 0.25s;
+    transform: translateX(var(--tabOffset));
+    transform-origin: left center;
   }
 }

src/components/Tabs/Tabs.tsx

@@ -1,9 +1,9 @@
 import './Tabs.css';
 
-import React, { createRef, useEffect, useMemo, useRef } from 'react';
+import React, { createRef, useMemo } from 'react';
 
 import { useChoiceGroup } from '../../hooks/useChoiceGroup/useChoiceGroup';
-import { useForkRef } from '../../hooks/useForkRef/useForkRef';
+import { useResizeObserved } from '../../hooks/useResizeObserved/useResizeObserved';
 import { IconProps, IconPropSize } from '../../icons/Icon/Icon';
 import { cn } from '../../utils/bem';
 import { getSizeByMap } from '../../utils/getSizeByMap';
@@ -75,22 +75,6 @@ const sizeMap: Record<TabsPropSize, IconPropSize> = {
   m: 's',
 };
 
-function setStyleForLine(
-  lineRef: React.RefObject<HTMLDivElement>,
-  tabsWidth: number,
-  tabWidth: number,
-  tabRatio: number,
-  tabOffsetLeft: number,
-) {
-  if (lineRef.current) {
-    const lineStyle = lineRef.current.style;
-    lineStyle.setProperty('--tabsWidth', `${tabsWidth}px`);
-    lineStyle.setProperty('--tabWidth', `${tabWidth}px`);
-    lineStyle.setProperty('--tabRatio', `${tabRatio}`);
-    lineStyle.setProperty('--tabOffsetLeft', `${tabOffsetLeft}px`);
-  }
-}
-
 function renderItemDefault<ITEM, ITEMELEMENT extends HTMLElement>(
   props: RenderItemProps<ITEM, ITEMELEMENT>,
 ): React.ReactElement {
@@ -129,51 +113,26 @@ export const Tabs: Tabs = React.forwardRef((props, ref) => {
     multiple: false,
   });
 
-  const constructItemRefs: () => Record<string, React.RefObject<ItemElement>> = () => {
-    const refs: Record<string, React.RefObject<ItemElement>> = {};
-    for (const item of items) {
-      refs[getLabel(item)] = createRef<ItemElement>();
-    }
-    return refs;
-  };
-
-  const buttonRefs = useMemo(constructItemRefs, [items, getLabel]);
-
-  const rootRef = useRef<HTMLDivElement>(null);
-  const lineRef = useRef<HTMLDivElement>(null);
-
-  const updateLine = () => {
-    if (rootRef.current && lineRef.current && buttonRefs) {
-      const rootWidth = rootRef.current.offsetWidth;
-      if (value) {
-        const activeItemRef = buttonRefs[getLabel(value)];
-        if (activeItemRef && activeItemRef.current) {
-          const itemWidth = activeItemRef.current.offsetWidth;
-          const itemOffsetLeft = activeItemRef.current.offsetLeft;
-          setStyleForLine(lineRef, rootWidth, itemWidth, itemWidth / rootWidth, itemOffsetLeft);
-        }
-      } else {
-        setStyleForLine(lineRef, rootWidth, 1, 0.00001, 1);
-      }
-    }
-  };
-
-  useEffect(() => updateLine());
-
-  const withOutValue = !value;
+  const tabRefs = useMemo(
+    () => new Array(items.length).fill(null).map(() => createRef<ItemElement>()),
+    [items],
+  );
+  const tabsDimensions = useResizeObserved(tabRefs, (el) => ({
+    size: el?.offsetWidth ?? 0,
+    offset: el?.offsetLeft ?? 0,
+  }));
+  const activeTabIdx = (value && items.indexOf(value)) ?? -1;
+  const activeTabDimensions = tabsDimensions[activeTabIdx];
+
   const iconSize = getSizeByMap(sizeMap, size, iconSizeProp);
 
   return (
-    <div
-      className={cnTabs({ size, view }, [className])}
-      ref={useForkRef<HTMLDivElement>([ref, rootRef])}
-      {...otherProps}
-    >
+    <div className={cnTabs({ size, view }, [className])} ref={ref} {...otherProps}>
       <div className={cnTabs('List')}>
-        {items.map((item) =>
+        {items.map((item, idx) =>
           renderItem({
             item,
-            ref: buttonRefs[getLabel(item)],
+            ref: tabRefs[idx],
             key: getLabel(item),
             onChange: getOnChange(item),
             checked: getChecked(item),
@@ -185,9 +144,15 @@ export const Tabs: Tabs = React.forwardRef((props, ref) => {
           }),
         )}
       </div>
-      <div className={cnTabs('WrapperRunningLine')}>
-        <div className={cnTabs('RunningLine', { withOutValue })} ref={lineRef} />
-      </div>
+      {activeTabDimensions?.size > 0 && (
+        <div
+          className={cnTabs('RunningLine')}
+          style={{
+            ['--tabSize' as string]: `${activeTabDimensions.size}px`,
+            ['--tabOffset' as string]: `${activeTabDimensions.offset}px`,
+          }}
+        />
+      )}
     </div>
   );
 });

src/components/ThemeToggler/__tests__/ThemeToggler.test.tsx

@@ -2,7 +2,6 @@ import React from 'react';
 import { fireEvent, render, screen } from '@testing-library/react';
 
 import { exampleThemesThree, exampleThemesTwo } from '../__mocks__/data.mock';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cnContextMenuItem } from '../../ContextMenu/ContextMenuItem/ContextMenuItem';
 import { Props, ThemeToggler } from '../ThemeToggler';
 
@@ -13,10 +12,6 @@ type ThemeTogglerProps = Props<Item>;
 const defaultSetValue = jest.fn();
 const testId = 'ThemeToggler';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const renderComponent = (props: Partial<ThemeTogglerProps>) => {
   return render(
     <>

src/components/UserSelect/__tests__/UserSelect.test.tsx

@@ -2,7 +2,6 @@ import * as React from 'react';
 import { act, fireEvent, render, RenderResult, screen } from '@testing-library/react';
 
 import { groups, items } from '../__mocks__/data.mock';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { cn } from '../../../utils/bem';
 import { cnSelect } from '../../SelectComponents/cnSelect';
 import { cnSelectGroupLabel } from '../../SelectComponents/SelectGroupLabel/SelectGroupLabel';
@@ -11,10 +10,6 @@ import { defaultGetItemLabel, UserSelect, UserSelectProps } from '../UserSelect'
 import { cnUserSelectItem } from '../UserSelectItem/UserSelectItem';
 import { cnUserSelectValue } from '../UserSelectValue/UserSelectValue';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const animationDuration = 200;
 const testId = 'UserSelect';
 const cnRenderValue = cn('RenderValue');

src/components/UserSelectDeprecated/__tests__/UserSelect.test.tsx

@@ -2,16 +2,11 @@ import React, { useState } from 'react';
 import { act, fireEvent, render, screen } from '@testing-library/react';
 
 import { simpleItems } from '../__mocks__/data.mock';
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { getInitialsForName } from '../../Avatar/Avatar';
 import { cnSelect } from '../../SelectComponentsDeprecated/cnSelect';
 import { UserSelect } from '../UserSelect';
 import { cnUserItem } from '../UserSelectItem/UserSelectItem';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const testId = 'UserSelect';
 const animationDuration = 200;
 

src/hocs/withTooltip/__tests__/withTooltip.test.tsx

@@ -1,7 +1,6 @@
 import * as React from 'react';
 import { act, fireEvent, render, screen } from '@testing-library/react';
 
-import ResizeObserver from '../../../../__mocks__/ResizeObserver';
 import { Button } from '../../../components/Button/Button';
 import {
   appearTimeoutDefault,
@@ -10,10 +9,6 @@ import {
   withTooltip,
 } from '../withTooltip';
 
-jest.mock('resize-observer-polyfill', () => {
-  return ResizeObserver;
-});
-
 const testId = 'withTooltip';
 const tooltipRole = 'Tooltip';