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TypeScript Academy · Lesson

E2E typing glimpses (Playwright/Cypress)

See how TypeScript types flow in E2E tests with Playwright and Cypress; add proper type support and safe selectors.

E2E typing glimpses (Playwright/Cypress) is a free TypeScript Academy lesson on CoddyKit — lesson 3 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the TypeScript Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.

Intro

Goal: Glimpse how TypeScript enhances E2E tests. We'll set up typing for Playwright and Cypress, and write tiny typed tests.

Playwright install

Playwright ships its own test runner + types. Import from @playwright/test to get typed test, expect, and page.

npm install --save-dev @playwright/test

Playwright test

In Playwright, the page and locator types are strong; misuses are caught in compilation.

// example.spec.ts
import { test, expect } from "@playwright/test";

test("home loads", async ({ page }) => {
  await page.goto("/")
  const title = page.getByRole("heading", { name: /welcome/i })
  await expect(title).toBeVisible()
  // page is fully typed: URL, locators, assertions
})

Cypress types

For Cypress global types, add types: ["cypress"] to tsconfig or write a reference to the support file.

// tsconfig.json (excerpt)
{
  "compilerOptions": {
    "types": ["cypress"]
  }
}

// or in cypress/support/e2e.d.ts
/// <reference types="cypress" />

Cypress test

cy command chains, assertion chains, and plugin commands are typed with TS; IDE recommendations become clear.

// cypress/e2e/home.cy.ts
describe("home", () => {
  it("loads", () => {
    cy.visit("/")
    cy.findByRole("heading", { name: /welcome/i }).should("be.visible")
  })
})

Selectors helper

Data-testid based helper functions are more stable than fragile CSS/XPath selectors and provide easy autocompletion with TS.

// helpers/selectors.ts
export const h = {
  title: (name: string) => `[data-testid="title-${name}"]`,
}

// usage (Playwright)
// await expect(page.locator(h.title("home"))).toBeVisible()

// usage (Cypress)
// cy.get(h.title("home")).should("be.visible")

Cypress types check

Quick check: How do you enable Cypress global types (cy, Cypress) in TS?

Recap

Recap: Playwright and Cypress provide strong types with TS. Correct setup + safe selectors make E2E tests more reliable.

Frequently asked questions

Is the “E2E typing glimpses (Playwright/Cypress)” lesson free?

Yes — the full text of “E2E typing glimpses (Playwright/Cypress)” is free to read here on the web, and the TypeScript Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the TypeScript Academy course, upgrade to CoddyKit PRO.

What will I learn in “E2E typing glimpses (Playwright/Cypress)”?

See how TypeScript types flow in E2E tests with Playwright and Cypress; add proper type support and safe selectors. You practise TypeScript Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.

Do I need any experience to start TypeScript Academy?

No prior experience is required. TypeScript Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 3 of 3, so you can start here or from the beginning and move at your own pace.

How long does the “E2E typing glimpses (Playwright/Cypress)” lesson take?

Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.

Can I write and run code in this TypeScript Academy lesson?

Yes. Every TypeScript Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.

All lessons in this course

  1. Vitest/Jest setup for TS
  2. Typing tests & mocks; expectTypeOf
  3. E2E typing glimpses (Playwright/Cypress)
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