Unlock 30% off on Manual Testing Annual Plans this Holiday Season. 
Use Code: LCMYEARENDEXCL30
Use Code: LCMYEARENDEXCL30Check icon
Copied to Clipboard!
How to use useWindowSize method in Cypress
Best JavaScript code snippet using cypress
Messenger.disabled.js
Source:Messenger.disabled.js 
1import { render, screen } from "@testing-library/react";2import { BrowserRouter } from "react-router-dom";3import Messenger from "./Messenger";4import getContacts from "./getContacts/getContacts";5import getMessages from "./getMessages/getMessages";6import testImage from "../../images/test-images/RightSideBox/david.barrell.png";7import { UserContext } from "../Main";8import useWindowSize from "../../hooks/useWindowSize/useWindowSize";9jest.mock("../../hooks/useWindowSize/useWindowSize");10jest.mock("./getContacts/getContacts");11jest.mock("./getMessages/getMessages");12describe("Messenger - small screen", () => {13 let instance;14 beforeEach(() => {15 getContacts.mockReturnValue([16 {17 id: "random ID 1",18 name: "test-user-name",19 image: testImage,20 },21 ]);22 getMessages.mockReturnValue([23 {24 id: 1,25 authorID: "random ID 1",26 content: "message content 1",27 },28 {29 id: 2,30 authorID: "random ID 2",31 content: "message content 2",32 },33 {34 id: 3,35 authorID: "random ID 1",36 content: "message content 3",37 },38 ]);39 useWindowSize.mockReturnValue({ width: 700 });40 instance = render(41 <BrowserRouter>42 <UserContext.Provider43 value={{44 id: 1,45 }}46 >47 <Messenger />48 </UserContext.Provider>49 </BrowserRouter>50 );51 });52 it("renders Mobile component when screen width is less than 768px", () => {53 const mobile = screen.getByTestId("test-messenger-mobile");54 expect(mobile).toBeTruthy();55 });56});57// Bug with resetting useWindowSize mock, so new describe block used for larger screens58describe("Messenger - large screen", () => {59 let instance;60 beforeEach(() => {61 getContacts.mockReturnValue([62 {63 id: "random ID 1",64 name: "test-user-name",65 image: testImage,66 },67 ]);68 getMessages.mockReturnValue([69 {70 id: 1,71 authorID: "random ID 1",72 content: "message content 1",73 },74 {75 id: 2,76 authorID: "random ID 2",77 content: "message content 2",78 },79 {80 id: 3,81 authorID: "random ID 1",82 content: "message content 3",83 },84 ]);85 useWindowSize.mockReturnValue({ width: 900 });86 instance = render(87 <BrowserRouter>88 <UserContext.Provider89 value={{90 id: 1,91 }}92 >93 <Messenger />94 </UserContext.Provider>95 </BrowserRouter>96 );97 });98 it("renders Desktop component when screen width is greater than 768px", () => {99 const desktop = screen.getByTestId("test-messenger-desktop");100 expect(desktop).toBeTruthy();101 });...
use-window-size.test.js
Source:use-window-size.test.js
...5import useWindowMock from "support/hooks/use-window-mock";6describe("useWindowSize", () => {7 describe("listeners", () => {8 function Component() {9 useWindowSize();10 return null;11 }12 useWindowMock("addEventListener");13 useWindowMock("removeEventListener");14 it("adds resize event listener", () => {15 new ComponentHandler(<Component />);16 expect(window.addEventListener).toHaveBeenCalledWith("resize", expect.any(Function));17 });18 it("removes resize event listener", () => {19 const component = new ComponentHandler(<Component />);20 component.unmount();21 expect(window.removeEventListener).toHaveBeenCalledWith("resize", expect.any(Function));22 });23 });24 describe("values", () => {25 let size;26 function Component() {27 size.current = useWindowSize();28 return null;29 }30 useResizeMock();31 beforeEach(() => {32 size = createRef(null);33 });34 it("returns current window size", () => {35 new ComponentHandler(<Component />);36 expect(size.current).toEqual([window.innerWidth, window.innerHeight]);37 });38 it("returns updated window size", () => {39 const component = new ComponentHandler(<Component />);40 component.act(() => window.resizeTo(1000, 2000));41 expect(size.current).toEqual([1000, 2000]);...
useWindowSize.test.js
Source:useWindowSize.test.js
...4describe("useWindowSize", () => {5 global.innerWidth = 500;6 global.innerHeight = 800;7 it("reads initial innerWidth and innerHeight values from window", () => {8 const { result } = renderHook(() => useWindowSize());9 expect(result.current.width).toBe(500);10 expect(result.current.height).toBe(800);11 });12 it("updates innerWidth and innerHeight values when window resizes", () => {13 const { result } = renderHook(() => useWindowSize());14 expect(result.current.width).toBe(500);15 expect(result.current.height).toBe(800);16 act(() => {17 global.innerWidth = 1000;18 global.innerHeight = 1000;19 fireEvent(global, new Event("resize"));20 });21 expect(result.current.width).toBe(1000);22 expect(result.current.height).toBe(1000);23 });24 it("returns an object", () => {25 const { result } = renderHook(() => useWindowSize());26 expect(typeof result.current).toBe("object");27 });28});...
homeSubscription.js
Source:homeSubscription.js
...3import PhoneSubs from "../components/phoneSubs";4import TabletSubs from "../components/tabletSubs";5import useWindowSize from "../hooks/UseWindowSize";6const HomeSubscription = () => {7 const windowSize = useWindowSize();8 const renderByWindowSize = () => {9 if (windowSize.width < 479) {10 return <PhoneSubs />;11 }12 if (windowSize.width < 872) {13 return <TabletSubs />;14 }15 return <ComSubs />;16 };17 return (18 <div className="subs" id="subscribe-section">19 <span className="subs--title">OUR SUBSCRIPTION PLANS</span>20 <span className="subs--desc">For registered users only (Optional)</span>21 <input...
useScreenSizeDependentState.js
Source:useScreenSizeDependentState.js
...12export default function useScreenSizeDependentState(): [13 boolean, // collapse14 boolean, // screenTooSmall15] {16 const { height, width } = useWindowSize();17 const collapse = height < HEIGHT_THRESHOLD || width < WIDTH_THRESHOLD;18 const screenTooSmall = height < MIN_SCREEN_SIZE || width < MIN_SCREEN_SIZE;19 return [collapse, screenTooSmall];...
WindowSizeContext.js
Source:WindowSizeContext.js
1import { createContext, useContext } from 'react';2import useWindowSize from '../hooks/useWindowSize';3const WindowSizeContext = createContext();4export const WindowSizeProvider = ({ children }) => {5 const windowSize = useWindowSize();6 return (7 <WindowSizeContext.Provider value={windowSize}>8 {children}9 </WindowSizeContext.Provider>10 );11};12const useWindowSizeContext = () => {13 const context = useContext(WindowSizeContext);14 if (context === undefined) {15 throw new Error(16 'useWindowSize must be used within a WindowSizeProvider'17 );18 }19 return context;...
Confetti.js
Source:Confetti.js
1import React from "react";2import useWindowSize from "react-use/lib/useWindowSize";3import Confetti from "react-confetti";4const ConfettiComponent = () => {5 const { width, height } = useWindowSize();6 return (7 <Confetti8 numberOfPieces={150}9 gravity={0.01}10 width={width}11 height={height}12 />13 );14};...
index.js
Source:index.js
1import useWindowSize from './useWindowSize';...
Using AI Code Generation
1describe('My First Test', () => {2 it('Does not do much!', () => {3 cy.get('.home-list > :nth-child(1) > a').click()4 cy.useWindowSize(1920, 1080)5 cy.wait(2000)6 })7})8Cypress.Commands.add('useWindowSize', (width, height) => {9 if (Cypress._.isArray(width)) {10 ;[width, height] = width11 }12 if (Cypress._.isObject(width)) {13 ;({ width, height } = width)14 }15 cy.window().then((win) => {16 win.resizeTo(width, height)17 })18})19Cypress.Commands.add('useWindowSize', (width, height) => {20 if (Cypress._.isArray(width)) {21 ;[width, height] = width22 }23 if (Cypress._.isObject(width)) {24 ;({ width, height } = width)25 }26 cy.window().then((win) => {27 win.resizeTo(width, height)28 })29})30Cypress.Commands.add('useWindowSize', (width, height) => {31 if (Cypress._.isArray(width)) {32 ;[width, height] = width33 }34 if (Cypress._.isObject(width)) {35 ;({ width, height } = width)36 }37 cy.window().then((win) => {38 win.resizeTo(width, height)39 })40})41Cypress.Commands.add('useWindowSize', (width, height) => {42 if (Cypress._.isArray(width)) {43 ;[width, height] = width44 }45 if (Cypress._.isObject(width)) {46 ;({ width, height } = width)47 }48 cy.window().then((win) => {49 win.resizeTo(width, height)50 })51})52Cypress.Commands.add('useWindowSize', (width, height) => {53 if (Cypress._.isArray(width)) {54 ;[width, height] = width55 }56 if (Cypress._.isObject(width)) {
Using AI Code Generation
1describe('My First Test', function() {2 it('Does not do much!', function() {3 cy.viewport(320, 480)4 cy.wait(3000)5 })6})7describe('My First Test', function() {8 it('Does not do much!', function() {9 cy.viewport(1280, 720)10 cy.wait(3000)11 })12})13describe('My First Test', function() {14 it('Does not do much!', function() {15 cy.viewport(1980, 1080)16 cy.wait(3000)17 })18})19describe('My First Test', function() {20 it('Does not do much!', function() {21 cy.viewport(2560, 1440)22 cy.wait(3000)23 })24})25describe('My First Test', function() {26 it('Does not do much!', function() {27 cy.viewport(3840, 2160)28 cy.wait(3000)29 })30})31describe('My First Test', function() {32 it('Does not do much!', function() {33 cy.viewport('ipad-2')34 cy.wait(3000)35 })36})37describe('My First Test', function() {38 it('Does not do much!', function() {39 cy.viewport('iphone-6')40 cy.wait(3000)41 })42})43describe('My First Test', function() {44 it('Does not do much!', function() {45 cy.viewport('iphone-6+')46 cy.wait(3000)47 })48})49describe('My First Test', function() {50 it('Does
Using AI Code Generation
1describe('Test', () => {2 it('test', () => {3 cy.viewport(1000, 660);4 cy.get('#lst-ib').type('Cypress');5 cy.get('#tsf > div.tsf-p > div.jsb > center > input[type="submit"]:nth-child(1)').click();6 cy.get('#rso > div:nth-child(1) > div > div:nth-child(1) > div > div > h3 > a').click();
Using AI Code Generation
1import { useWindowSize } from 'cypress-real-events/support';2describe('test', () => {3 it('test', () => {4 cy.visit('url');5 useWindowSize(1440, 900);6 cy.get('element').click();7 });8});9import { useWindowSize } from 'cypress-real-events/support';10describe('test', () => {11 it('test', () => {12 cy.visit('url');13 useWindowSize(1440, 900);14 cy.get('element').attachFile('file.png');15 });16});17import { useWindowSize } from 'cypress-real-events/support';18describe('test', () => {19 it('test', () => {20 cy.visit('url');21 useWindowSize(1440, 900);22 cy.get('element').attachFile('file.png');23 });24});25import { useWindowSize } from 'cypress-real-events/support';26describe('test', () => {27 it('test', () => {28 cy.visit('url');29 useWindowSize(1440, 900);30 cy.get('element').attachFile('file.png');31 });32});
Using AI Code Generation
1describe('Test useWindowSize', () => {2 it('should get the window size', () => {3 cy.useWindowSize(400, 600)4 cy.get('h1').should('be.visible')5 })6})7Cypress.Commands.add('useWindowSize', (width, height) => {8 if (width && height) {9 cy.window().then(win => {10 win.resizeTo(width, height)11 })12 }13})
Using AI Code Generation
1cy.viewport(1280, 720)2cy.useWindowSize()3})4it('test', () => {5Cypress.Commands.add('useWindowSize', () => {6cy.window().then(win => {7win.dispatchEvent(new Event('resize'))8})9})10})
Using AI Code Generation
1describe('Test to use useWindowSize', () => {2 it('should open the page', () => {3 });4 it('should get the window size', () => {5 cy.window().then(win => {6 cy.wrap(win.useWindowSize()).should('deep.eq', { width: 1024, height: 768 });7 });8 });9});10Cypress.Commands.add('useWindowSize', () => {11 cy.document().should(doc => {12 expect(doc.defaultView.innerWidth).to.be.a('number');13 expect(doc.defaultView.innerHeight).to.be.a('number');14 });15 return cy.document().then(doc => {16 return {17 };18 });19});
Using AI Code Generation
1describe('Test', () => {2 it('Should test if window size is correct', () => {3 cy.useWindowSize(1920, 1080);4 });5});6Cypress.Commands.add('useWindowSize', (width, height) => {7 if (Cypress._.isArray(width)) {8 [width, height] = width;9 }10 cy.viewport(width, height);11});12declare namespace Cypress {13 interface Chainable {14 useWindowSize(width: number, height: number): Chainable<Element>;15 }16}
Using AI Code Generation
1describe('Test window size', function() {2 it('Get the window size', function() {3 cy.viewport(1000, 600)4 cy.get('h1').should('be.visible')5 })6})
Cypress Tutorial
Cypress is a renowned Javascript-based open-source, easy-to-use end-to-end testing framework primarily used for testing web applications. Cypress is a relatively new player in the automation testing space and has been gaining much traction lately, as evidenced by the number of Forks (2.7K) and Stars (42.1K) for the project. LambdaTest’s Cypress Tutorial covers step-by-step guides that will help you learn from the basics till you run automation tests on LambdaTest.
Chapters:
- What is Cypress? -
- Why Cypress? - Learn why Cypress might be a good choice for testing your web applications.
- Features of Cypress Testing - Learn about features that make Cypress a powerful and flexible tool for testing web applications.
- Cypress Drawbacks - Although Cypress has many strengths, it has a few limitations that you should be aware of.
- Cypress Architecture - Learn more about Cypress architecture and how it is designed to be run directly in the browser, i.e., it does not have any additional servers.
- Browsers Supported by Cypress - Cypress is built on top of the Electron browser, supporting all modern web browsers. Learn browsers that support Cypress.
- Selenium vs Cypress: A Detailed Comparison - Compare and explore some key differences in terms of their design and features.
- Cypress Learning: Best Practices - Take a deep dive into some of the best practices you should use to avoid anti-patterns in your automation tests.
- How To Run Cypress Tests on LambdaTest? - Set up a LambdaTest account, and now you are all set to learn how to run Cypress tests.
Certification
You can elevate your expertise with end-to-end testing using the Cypress automation framework and stay one step ahead in your career by earning a Cypress certification. Check out our Cypress 101 Certification.
YouTube
Watch this 3 hours of complete tutorial to learn the basics of Cypress and various Cypress commands with the Cypress testing at LambdaTest.
Run Cypress automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
