Auth Once with storageState (Playwright + TypeScript, Ch.15)

Welcome to Part 4 — Integration, the part that separates a toy suite from a real

one: making the API and UI layers work together. We start with the highest-leverage

example — authentication.

Logging in through the UI form on every test is slow (page load + type + submit +

redirect) and repetitive. Playwright's answer is storageState: capture the

browser session — cookies and localStorage — once, save it to disk, and load it

into any test so it opens already authenticated.

Code for this chapter is tagged ch-15 in the repo:



and tell me how many seconds storageState shaved off your suite.