diff --git a/src/components/Loader.ts b/src/components/Loader.ts
index d4d6772..ce72966 100644
--- a/src/components/Loader.ts
+++ b/src/components/Loader.ts
@@ -1,4 +1,4 @@
-import { $, Dom } from 'core/dom';
+import { $, Dom } from 'core/Dom';
 
 export function Loader(): Dom {
   return $.create('div', 'loader')
diff --git a/src/components/excel/Excel.ts b/src/components/excel/Excel.ts
index 7140ff8..4c30f9a 100644
--- a/src/components/excel/Excel.ts
+++ b/src/components/excel/Excel.ts
@@ -1,5 +1,5 @@
-import { $ } from 'core/dom';
-import { Emitter } from 'core/Emitter';
+import { $ } from 'core/Dom';
+import { Observer } from 'core/Observer';
 import { ExcelComponent } from 'core/ExcelComponent';
 import { Store } from 'core/store/Store';
 import { StoreSubscriber } from 'core/StoreSubscriber';
@@ -10,15 +10,20 @@ interface ExcelOptionsType {
   store: any,
 }
 
+type BaseComponentOption = {
+  observer: Observer;
+  store: Store;
+};
+
 export class Excel {
   components: any[];
-  emitter: Emitter;
+  observer: Observer;
   store: Store;
   subscriber: StoreSubscriber;
 
   constructor(options: ExcelOptionsType) {
     this.components = options.components;
-    this.emitter = new Emitter();
+    this.observer = new Observer();
     this.store = options.store;
     this.subscriber = new StoreSubscriber(this.store);
   }
@@ -26,8 +31,8 @@ export class Excel {
   getRoot() {
     const $root = $.create('div', 'excel');
 
-    const componentOptions = {
-      emitter: this.emitter,
+    const componentOptions: BaseComponentOption = {
+      observer: this.observer,
       store: this.store,
     };
 
diff --git a/src/components/formula/Formula.ts b/src/components/formula/Formula.ts
index 12f5ecc..b58d628 100644
--- a/src/components/formula/Formula.ts
+++ b/src/components/formula/Formula.ts
@@ -1,4 +1,4 @@
-import { Dom } from 'core/dom';
+import { Dom } from 'core/Dom';
 import { ExcelComponent, ComponentOptionsType } from 'core/ExcelComponent';
 
 export class Formula extends ExcelComponent {
@@ -8,13 +8,10 @@ export class Formula extends ExcelComponent {
 
   constructor($root: Dom, options: ComponentOptionsType) {
     super($root, {
-      // @ts-ignore next-line
-      eventListeners: ['input', 'keydown'],
-      // @ts-ignore next-line
-      name: 'Formula',
-      // @ts-ignore next-line
-      subscribe: ['currentText'],
       ...options,
+      eventListeners: ['input', 'keydown'],
+      name: 'Formula',
+      subscribe: ['currentText'],
     });
   }
 
@@ -30,7 +27,7 @@ export class Formula extends ExcelComponent {
 
     this.formulaInput = this.$root.find('#formula-input');
 
-    this.$on('table:select-cell', (cell: Dom) => {
+    this.$onEventFromObserver('table:select-cell', (cell: Dom) => {
       this.formulaInput.text = cell.data.value || '';
     });
   }
@@ -44,7 +41,8 @@ export class Formula extends ExcelComponent {
     if (!target) return;
 
     const text = (target as HTMLElement).innerText.trim();
-    this.$emit('formula:input', text);
+
+    this.$emitEventToObserver('formula:input', text);
   }
 
   onKeydown(event: KeyboardEvent) {
@@ -53,7 +51,7 @@ export class Formula extends ExcelComponent {
     if (preventedKeys.includes(event.key)) event.preventDefault();
 
     if (event.key === 'Enter') {
-      this.$emit('formula:enter-press');
+      this.$emitEventToObserver('formula:enter-press');
     }
   }
 }
diff --git a/src/components/header/Header.ts b/src/components/header/Header.ts
index da01b26..a291671 100644
--- a/src/components/header/Header.ts
+++ b/src/components/header/Header.ts
@@ -1,18 +1,18 @@
+import { ComponentOptionsType, ExcelComponent } from 'core/ExcelComponent';
 import * as actions from 'redux/action-creators';
-import { $, Dom } from 'core/dom';
+import { $, Dom } from 'core/Dom';
 import { ActiveRoute } from 'core/routes/ActiveRoute';
-import { ExcelComponentState } from 'core/ExcelComponentState';
 import { deleteTable } from 'redux/action-creators';
 
-export class Header extends ExcelComponentState {
+export class Header extends ExcelComponent {
   static className = 'excel__header';
 
-  constructor($root: Dom, options: any) {
+  constructor($root: Dom, options: ComponentOptionsType) {
     super($root, {
+      ...options,
       name: 'Header',
       eventListeners: ['input', 'click'],
       subscribe: ['title'],
-      ...options,
     });
   }
 
diff --git a/src/components/table/Table.ts b/src/components/table/Table.ts
index 3283101..13debbb 100644
--- a/src/components/table/Table.ts
+++ b/src/components/table/Table.ts
@@ -1,7 +1,7 @@
 import { startCellId } from 'components/table/table.functions';
 import * as actions from 'redux/action-creators';
-import { $, Dom } from 'core/dom';
-import { ExcelComponent } from 'core/ExcelComponent';
+import { $, Dom } from 'core/Dom';
+import { ComponentOptionsType, ExcelComponent } from 'core/ExcelComponent';
 import { TableSelection } from 'components/table/TableSelection';
 import { changeCurrentStyles } from 'redux/action-creators';
 import { createTable } from 'components/table/table.template';
@@ -15,11 +15,11 @@ export class Table extends ExcelComponent {
 
   private selection: TableSelection;
 
-  constructor($root: Dom, options: any) {
+  constructor($root: Dom, options: ComponentOptionsType) {
     super($root, {
+      ...options,
       name: 'Table',
       eventListeners: ['mousedown', 'keydown', 'input'],
-      ...options,
     });
   }
 
@@ -36,9 +36,9 @@ export class Table extends ExcelComponent {
 
     this.initTable();
 
-    this.$on('formula:input', this.updateCurrentText);
-    this.$on('formula:enter-press', () => this.selection.current.focus());
-    this.$on('toolbar:applyStyle', this.updateCurrentStyles);
+    this.$onEventFromObserver('formula:input', this.updateCurrentText);
+    this.$onEventFromObserver('formula:enter-press', () => this.selection.current.focus());
+    this.$onEventFromObserver('toolbar:applyStyle', this.updateCurrentStyles);
   }
 
   initTable() {
@@ -55,12 +55,12 @@ export class Table extends ExcelComponent {
 
     Object.keys(size.col).forEach(key => {
       const cols = this.$root.findAll(`[data-col="${key}"]`);
-      cols.forEach(el => $(el as HTMLElement).css({ width: `${size.col[key]}px` }));
+      cols.forEach(el => $(el as HTMLElement).css({ width: `${size.col[+key]}px` }));
     });
 
     Object.keys(size.row).forEach(key => {
       const rows = this.$root.findAll(`[data-row="${key}"]`);
-      rows.forEach(el => $(el as HTMLElement).css({ height: `${size.row[key]}px` }));
+      rows.forEach(el => $(el as HTMLElement).css({ height: `${size.row[+key]}px` }));
     });
   }
 
@@ -83,11 +83,11 @@ export class Table extends ExcelComponent {
     const $cell = this.$root.find(`[data-id="${startCellId}"]`);
     this.selection.select($cell);
 
-    this.$emit('table:select-cell', $cell);
+    this.$emitEventToObserver('table:select-cell', $cell);
   }
 
   emitSelectCallback() {
-    this.$emit('table:select-cell', this.selection.current);
+    this.$emitEventToObserver('table:select-cell', this.selection.current);
 
     const styles = this.selection.current?.getStyles(Object.keys(initialStyleState));
     this.dispatchToStore(changeCurrentStyles(styles));
diff --git a/src/components/table/TableSelection.ts b/src/components/table/TableSelection.ts
index 395ffc2..92fdabd 100644
--- a/src/components/table/TableSelection.ts
+++ b/src/components/table/TableSelection.ts
@@ -1,4 +1,4 @@
-import { $, Dom } from 'core/dom';
+import { $, Dom } from 'core/Dom';
 import { getParamsFromCellId, startCellId } from 'components/table/table.functions';
 
 export class TableSelection {
diff --git a/src/components/table/handlers/table.resize.ts b/src/components/table/handlers/table.resize.ts
index 5ad56cc..9e88ed6 100644
--- a/src/components/table/handlers/table.resize.ts
+++ b/src/components/table/handlers/table.resize.ts
@@ -1,5 +1,5 @@
 import { startCellId } from 'components/table/table.functions';
-import { $, Dom } from 'core/dom';
+import { $, Dom } from 'core/Dom';
 
 type CustomElementType = Element & { css: any };
 type ResizeReturnDataType = { value: number, id: string, type: string };
diff --git a/src/components/table/handlers/table.select.handler.ts b/src/components/table/handlers/table.select.handler.ts
index 5c418be..2d05197 100644
--- a/src/components/table/handlers/table.select.handler.ts
+++ b/src/components/table/handlers/table.select.handler.ts
@@ -1,4 +1,4 @@
-import { $ } from 'core/dom';
+import { $ } from 'core/Dom';
 import { TableSelection } from 'components/table/TableSelection';
 import { getParamsFromCellId, isCell, startCellId } from 'components/table/table.functions';
 
@@ -68,7 +68,10 @@ export function selectHandler(event: MouseEvent | KeyboardEvent, selection: Tabl
       }
       case 'Tab': {
         event.preventDefault();
-        col++;
+
+        if (event.shiftKey) col--;
+        else col++;
+
         break;
       }
       default: break;
diff --git a/src/components/table/table.functions.ts b/src/components/table/table.functions.ts
index f777276..66a8104 100644
--- a/src/components/table/table.functions.ts
+++ b/src/components/table/table.functions.ts
@@ -1,4 +1,4 @@
-import { $ } from 'core/dom';
+import { $ } from 'core/Dom';
 
 export function isCell(event: Event): boolean {
   return $(event.target as HTMLElement).data.type === 'cell';
diff --git a/src/components/toolbar/Toolbar.ts b/src/components/toolbar/Toolbar.ts
index 5ea39e2..61566a6 100644
--- a/src/components/toolbar/Toolbar.ts
+++ b/src/components/toolbar/Toolbar.ts
@@ -1,5 +1,5 @@
 import { startCellId } from 'components/table/table.functions';
-import { $, Dom } from 'core/dom';
+import { $, Dom } from 'core/Dom';
 import { ExcelComponentState } from 'core/ExcelComponentState';
 import { ComponentOptionsType } from 'core/ExcelComponent';
 import { createToolbar } from 'components/toolbar/toolbar.template';
@@ -50,14 +50,14 @@ export class Toolbar extends ExcelComponentState {
     const value = JSON.parse(stringValue);
     const key = Object.keys(value)[0];
 
-    this.$emit('toolbar:applyStyle', value);
+    this.$emitEventToObserver('toolbar:applyStyle', value);
     this.setComponentState({ [key]: value[key] });
   }
 
   onChange(e: any) {
     const value = `${e.target.value.toString()}px`;
 
-    this.$emit('toolbar:applyStyle', { fontSize: value });
+    this.$emitEventToObserver('toolbar:applyStyle', { fontSize: value });
     this.setComponentState({ fontSize: value });
   }
 }
diff --git a/src/components/toolbar/toolbar-types.ts b/src/components/toolbar/toolbar-types.ts
index ebc85e4..44b6013 100644
--- a/src/components/toolbar/toolbar-types.ts
+++ b/src/components/toolbar/toolbar-types.ts
@@ -4,5 +4,5 @@ export type ToolbarStateType = {
   textDecoration?: 'none' | 'underline';
   justifyContent?: 'start' | 'center' | 'end';
   alignItems?: 'start' | 'center' | 'end';
-  fontSize?: any;
+  fontSize?: string;
 };
diff --git a/src/components/toolbar/toolbar.template.ts b/src/components/toolbar/toolbar.template.ts
index a088bf6..223eeb5 100644
--- a/src/components/toolbar/toolbar.template.ts
+++ b/src/components/toolbar/toolbar.template.ts
@@ -85,7 +85,7 @@ export function createToolbar(state: ToolbarStateType): string {
   return buttons.join(' ');
 }
 
-function createFontSizeButton(currentSize: string) {
+function createFontSizeButton(currentSize = '12px') {
   const fontSizeInPixels = +currentSize.slice(0, -2);
   const options = [];
 
@@ -95,9 +95,11 @@ function createFontSizeButton(currentSize: string) {
   }
 
   return `
-    <select class="button__size" id="button-size">
-      ${options.join('')}
-    </select>
+    <div class="button">
+      <select class="button__size" id="button-size">
+        ${options.join('')}
+      </select>
+    </div>
   `;
 }
 
diff --git a/src/core/Clients.ts b/src/core/Clients.ts
index ff9ff4b..b69277e 100644
--- a/src/core/Clients.ts
+++ b/src/core/Clients.ts
@@ -31,7 +31,7 @@ export class LocalStorageClient implements ClientDataType {
     });
   }
 
-  norm(state) {
+  norm(state: StateType) {
     return {
       ...state,
       currentStyles: { ...state.stylesState?.[startCellId] },
diff --git a/src/core/dom.ts b/src/core/Dom.ts
similarity index 100%
rename from src/core/dom.ts
rename to src/core/Dom.ts
diff --git a/src/core/DomListener.ts b/src/core/DomListener.ts
index 812cdfa..36e3ac6 100644
--- a/src/core/DomListener.ts
+++ b/src/core/DomListener.ts
@@ -1,4 +1,4 @@
-import { Dom } from 'core/dom';
+import { Dom } from 'core/Dom';
 import { capitalize } from 'core/utils';
 
 export class DomListener {
diff --git a/src/core/ExcelComponent.ts b/src/core/ExcelComponent.ts
index 6e61f39..79fe6f2 100644
--- a/src/core/ExcelComponent.ts
+++ b/src/core/ExcelComponent.ts
@@ -1,34 +1,28 @@
-import { ActionType } from 'redux/types';
-import { Dom } from 'core/dom';
+import { ActionType, StateType } from 'redux/types';
+import { Dom } from 'core/Dom';
 import { DomListener } from 'core/DomListener';
-import { Emitter } from 'core/Emitter';
+import { Observer } from 'core/Observer';
 import { Store } from 'core/store/Store';
 
-interface ExcelComponentClass {
-  toHTML: () => string;
-  prepare: () => void;
-  storeChanged?: (args: any) => void;
-}
-
 export type ComponentOptionsType = {
   eventListeners: string[];
   name: string;
-  emitter: Emitter;
+  observer: Observer;
   store: Store;
-  subscribe: string[],
+  subscribe: (keyof StateType)[],
 };
 
-export abstract class ExcelComponent extends DomListener implements ExcelComponentClass {
+export abstract class ExcelComponent extends DomListener {
   private name: string;
-  private emitter: Emitter;
+  private observer: Observer;
   public store: Store;
-  private subscribe: string[];
+  private subscribe: (keyof StateType)[];
   private unsubscribers: ((args?: any) => any)[];
 
   constructor($root: Dom, options: ComponentOptionsType) {
     super($root, options.eventListeners);
     this.name = options.name;
-    this.emitter = options.emitter;
+    this.observer = options.observer;
     this.store = options.store;
     this.subscribe = options.subscribe;
 
@@ -44,12 +38,12 @@ export abstract class ExcelComponent extends DomListener implements ExcelCompone
     return '';
   }
 
-  $emit(event: string, args?: any): void {
-    this.emitter?.emit(event, args);
+  $emitEventToObserver(event: string, args?: any): void {
+    this.observer?.emit(event, args);
   }
 
-  $on(event: string, callback: (args: any) => any) {
-    const unsub = this.emitter?.subscribe(event, callback);
+  $onEventFromObserver(event: string, callback: (args: any) => any) {
+    const unsub = this.observer?.subscribe(event, callback);
     unsub && this.unsubscribers.push(unsub);
   }
 
@@ -58,10 +52,10 @@ export abstract class ExcelComponent extends DomListener implements ExcelCompone
   }
 
   storeChanged(args?: any) {
-    console.log('CHANGE STORE: ', args);
+    console.log('CHANGE STORE: ', args, ' in component ', this.name);
   }
 
-  isWatching(key: string) {
+  isWatching(key: keyof StateType) {
     return this.subscribe?.includes(key);
   }
 
diff --git a/src/core/ExcelComponentState.ts b/src/core/ExcelComponentState.ts
index 9d8a187..0ca96ee 100644
--- a/src/core/ExcelComponentState.ts
+++ b/src/core/ExcelComponentState.ts
@@ -1,4 +1,4 @@
-import { Dom } from 'core/dom';
+import { Dom } from 'core/Dom';
 import { ExcelComponent, ComponentOptionsType } from 'core/ExcelComponent';
 
 type ExcelComponentStateType = {
diff --git a/src/core/Emitter.ts b/src/core/Observer.ts
similarity index 84%
rename from src/core/Emitter.ts
rename to src/core/Observer.ts
index dfbe507..3b46c30 100644
--- a/src/core/Emitter.ts
+++ b/src/core/Observer.ts
@@ -1,4 +1,4 @@
-export class Emitter {
+export class Observer {
   private listeners: {
     [k: string]: Array<(args?: any) => any>
   };
@@ -7,16 +7,6 @@ export class Emitter {
     this.listeners = {};
   }
 
-  emit(eventName: string, args: any[]) {
-    if (!Array.isArray(this.listeners[eventName])) return false;
-
-    this.listeners[eventName].forEach(listener => {
-      listener(args);
-    });
-
-    return true;
-  }
-
   subscribe(eventName: string, callback: (args?: any) => any) {
     this.listeners[eventName] = this.listeners[eventName] || [];
     this.listeners[eventName].push(callback);
@@ -25,4 +15,12 @@ export class Emitter {
       this.listeners[eventName] = this.listeners[eventName].filter(listener => listener !== callback);
     };
   }
+
+  emit(eventName: string, args: any[]) {
+    if (!Array.isArray(this.listeners[eventName])) return false;
+
+    this.listeners[eventName].forEach(listener => listener(args));
+
+    return true;
+  }
 }
diff --git a/src/core/StateProcessor.ts b/src/core/StateProcessor.ts
index 8d50893..2899d3c 100644
--- a/src/core/StateProcessor.ts
+++ b/src/core/StateProcessor.ts
@@ -5,9 +5,9 @@ import { StateType } from 'redux/types';
 export class StateProcessor {
   private client: ClientDataType;
 
-  constructor(client: ClientDataType, dalay = 300) {
+  constructor(client: ClientDataType, delay = 300) {
     this.client = client;
-    this.listen = debounce(this.listen.bind(this), dalay);
+    this.listen = debounce(this.listen.bind(this), delay);
   }
 
   listen(state: StateType) {
diff --git a/src/core/StoreSubscriber.ts b/src/core/StoreSubscriber.ts
index a5cb95e..271563c 100644
--- a/src/core/StoreSubscriber.ts
+++ b/src/core/StoreSubscriber.ts
@@ -4,30 +4,29 @@ import { isEqual } from 'core/utils';
 
 export class StoreSubscriber {
   sub: any;
-  prevState: StateType;
+  currentState: StateType;
 
   constructor(private store: Store) {
     this.sub = null;
-    this.prevState = {};
   }
 
   subscribeComponents(components: any[]) {
-    this.prevState = this.store.getState();
+    this.currentState = this.store.getState();
 
-    this.sub = this.store.subscribeFromStore((state: StateType) => {
-      if (!state) return;
+    this.sub = this.store.subscribeToStore((newState: StateType) => {
+      if (!newState) return;
 
-      Object.keys(state).forEach(key => {
-        if (!isEqual(this.prevState[key], state[key])) {
+      Object.keys(newState).forEach((key) => {
+        if (!isEqual(this.currentState[key as keyof StateType], newState[key as keyof StateType])) {
           components.forEach(component => {
             if (component.isWatching(key)) {
-              const changes = { [key]: state[key] };
-              component.storeChanged(changes);
+              component.storeChanged({ [key]: newState[key as keyof StateType] });
             }
           });
         }
       });
-      this.prevState = this.store.getState();
+
+      this.currentState = this.store.getState();
     });
   }
 
diff --git a/src/core/routes/router.ts b/src/core/routes/Router.ts
similarity index 97%
rename from src/core/routes/router.ts
rename to src/core/routes/Router.ts
index 2b6b687..3274245 100644
--- a/src/core/routes/router.ts
+++ b/src/core/routes/Router.ts
@@ -1,4 +1,4 @@
-import { $, Dom, SelectorType } from 'core/dom';
+import { $, Dom, SelectorType } from 'core/Dom';
 import { ActiveRoute } from 'core/routes/ActiveRoute';
 import { DashboardPage } from 'pages/DashboardPage';
 import { ExcelPage } from 'pages/ExcelPage';
@@ -34,8 +34,8 @@ export class Router {
   }
 
   async changePageHandler() {
-    this.$placeholder.clear().append(this.loader);
     this.page?.destroy();
+    this.$placeholder.clear().append(this.loader);
 
     let Page;
 
diff --git a/src/core/store/Store.ts b/src/core/store/Store.ts
index e229fcf..7849fe5 100644
--- a/src/core/store/Store.ts
+++ b/src/core/store/Store.ts
@@ -9,8 +9,9 @@ export class Store {
     this.listeners = [];
   }
 
-  subscribeFromStore(fn: (state: StateType) => void): SubscribeType {
+  subscribeToStore(fn: (state: StateType) => void): SubscribeType {
     this.listeners.push(fn);
+
     return {
       unsubscribe: () => {
         this.listeners = this.listeners.filter((l: any) => l !== fn);
@@ -23,7 +24,7 @@ export class Store {
     this.listeners.forEach(listener => listener(this.state));
   }
 
-  getState() {
+  getState(): StateType {
     return JSON.parse(JSON.stringify(this.state));
   }
 }
diff --git a/src/index.ts b/src/index.ts
index 695e536..4ff2833 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,5 @@
 import './styles/index.scss';
-import { Router } from 'core/routes/router';
+import { Router } from 'core/routes/Router';
 import { DashboardPage } from 'pages/DashboardPage';
 import { ExcelPage } from 'pages/ExcelPage';
 
diff --git a/src/pages/AbstractPage.ts b/src/pages/AbstractPage.ts
index 8565c75..3c727e3 100644
--- a/src/pages/AbstractPage.ts
+++ b/src/pages/AbstractPage.ts
@@ -1,7 +1,7 @@
 export abstract class AbstractPage {
-  params: any;
+  params: string[];
 
-  constructor(params: any) {
+  constructor(params: string[]) {
     this.params = params || Date.now().toString();
   }
 
diff --git a/src/pages/DashboardPage.ts b/src/pages/DashboardPage.ts
index 50236ad..a29a345 100644
--- a/src/pages/DashboardPage.ts
+++ b/src/pages/DashboardPage.ts
@@ -1,4 +1,4 @@
-import { $ } from 'core/dom';
+import { $ } from 'core/Dom';
 import { AbstractPage } from 'pages/AbstractPage';
 import { storage } from 'core/utils';
 
diff --git a/src/pages/ExcelPage.ts b/src/pages/ExcelPage.ts
index e2f163e..03e466b 100644
--- a/src/pages/ExcelPage.ts
+++ b/src/pages/ExcelPage.ts
@@ -32,7 +32,7 @@ export class ExcelPage extends AbstractPage {
     const state = await this.processor.get();
     const store = new Store(rootReducer, state);
 
-    this.storeSub = store.subscribeFromStore(this.processor.listen);
+    this.storeSub = store.subscribeToStore(this.processor.listen);
 
     this.excel = new Excel({
       components: [Header, Toolbar, Formula, Table],
diff --git a/src/redux/rootReducer.ts b/src/redux/rootReducer.ts
index 99ebbc9..a9f2c32 100644
--- a/src/redux/rootReducer.ts
+++ b/src/redux/rootReducer.ts
@@ -17,13 +17,13 @@ export function rootReducer(state: StateType, action: ActionType) {
       const newState: StateType = { ...state };
       const fieldName = `${action.resizeData?.type}State`;
 
-      newState[fieldName][action.resizeData?.id] = action.resizeData?.value;
+      newState[fieldName as 'colState' | 'rowState'][action.resizeData?.id] = action.resizeData?.value;
 
       return { ...state, ...newState };
     }
 
     case CHANGE_TEXT: {
-      const newState: StateType = state.dataState || {};
+      const newState: { [k: string]: string } = state.dataState || {};
       const fieldName = action.data.id;
 
       newState[fieldName] = action.data.text;
diff --git a/src/redux/types.d.ts b/src/redux/types.d.ts
index 5491dda..807a307 100644
--- a/src/redux/types.d.ts
+++ b/src/redux/types.d.ts
@@ -1,10 +1,20 @@
+import { ToolbarStateType } from 'components/toolbar/toolbar-types';
+
 export type ActionType = {
   type: string
   [k: string]: any
 };
 
 export type StateType = {
-  [k: string]: any
+  colState: { [k: number]: number };
+  rowState: { [k: number]: number };
+  currentStyles: ToolbarStateType;
+  dataState: { [k: string]: string };
+  id: string;
+  openDate: string;
+  stylesState: { [k: string]: ToolbarStateType };
+  title: string;
+  currentText: string;
 };
 
 export type ReducerType = (state: StateType, action: ActionType) => StateType;
diff --git a/test/Router.spec.js b/test/Router.spec.js
index 00ace3b..d955e2a 100644
--- a/test/Router.spec.js
+++ b/test/Router.spec.js
@@ -2,7 +2,7 @@
  * @jest-environment jsdom
  */
 
-import { Router } from '../src/core/routes/router';
+import { Router } from '../src/core/routes/Router';
 import { AbstractPage } from '../src/pages/AbstractPage';
 
 class DashboardPage extends AbstractPage {
diff --git a/test/createStore.spec.js b/test/createStore.spec.js
index 8b5551e..edda23b 100644
--- a/test/createStore.spec.js
+++ b/test/createStore.spec.js
@@ -1,4 +1,4 @@
-import { Store } from '../src/core/store/createStore';
+import { Store } from '../src/core/store/Store';
 
 const initialState = {
   count: 0,
@@ -24,7 +24,7 @@ describe('Create store', () => {
   test('should return store object', () => {
     expect(store).toBeDefined();
     expect(store.dispatchToStore).toBeDefined();
-    expect(store.subscribeFromStore).toBeDefined();
+    expect(store.subscribeToStore).toBeDefined();
     expect(store.getState).not.toBeUndefined();
   });
 
@@ -47,7 +47,7 @@ describe('Create store', () => {
   });
 
   test('should call subscriber', () => {
-    store.subscribeFromStore(handler);
+    store.subscribeToStore(handler);
     store.dispatchToStore({ type: 'ADD' });
 
     expect(handler).toHaveBeenCalled();
@@ -55,7 +55,7 @@ describe('Create store', () => {
   });
 
   test('should NOT call sub if unsubscribe', () => {
-    const unsub = store.subscribeFromStore(handler);
+    const unsub = store.subscribeToStore(handler);
     unsub.unsubscribe();
     store.dispatchToStore({ type: 'ADD' });