Highlights

• Puppeteer now has experimental support for custom selector engines through puppeteer.__experimental_registerCustomQueryHandler (#5753). This functionality is so highly experimental it’s not even documented in the API docs — on purpose! See this comment for instructions on how to try it out. We are hoping to gather feedback on whether this API is useful for you, and how we could improve it. Please let us know what you think!

Behind the scenes

• src/ is now 100% TypeScript! This now lays a baseline to start working on improving Puppeteer docs by automatically generating them, shipping type definitions built in (for now we recommend @types/puppeteer).

Raw notes

b2488eb - chore: mark version v3.0.3
ae7483d - chore: remove src/externs.d.ts (#5811)
de4f08d - chore: migrate src/Page.js to TypeScript (#5809)
eed7d94 - chore: improve readability for path strings (#5805)
d8d1f6f - chore: migrate src/api.js to TypeScript (#5808)
890c215 - chore: migrate src/Puppeteer to TypeScript (#5789)
209e25c - docs(readme): syntax-highlight nested snippets in debugging section (#5799)
53d6fab - docs(api.md): improve emulateMediaFeatures section (#5807)
ec91eca - chore: migrate src/Launcher to TypeScript (#5775)
5518bac - chore: update how we track coverage during unit tests (#5779)
4a47867 - feat: add support for string-based custom queries (#5753)
c212126 - chore: turn on Travis retries (#5787)
3116bb9 - chore: log product + binary on unit test runs (#5785)
541281b - chore: fix doclint issues (#5784)
32c8c69 - chore: enable mocha retries (#5782)
5fb399d - docs(contributing): update per recent changes (#5778)
8654d63 - chore: migrate src/NetworkManager to TypeScript (#5774)
862eea8 - chore: disable flaky setUserAgent test in Firefox (#5780)
a8908cf - chore: update incorrect link for DeviceDescriptors (#5777)
af2e458 - chore: migrate src/Target to TypeScript (#5771)
8a5008e - chore: migrate src/FrameManager to TypeScript (#5773)
c5c97b0 - chore: remove DOMWorld definition from externs.d.ts (#5767)
da6e6c0 - chore: migrate src/EmulationManager to TypeScript (#5766)
0157844 - chore: migrate src/DOMWorld to TypeScript (#5764)
d69fbb9 - chore: Enforce array type styles in TypeScript (#5765)
1ccfbcb - chore: enforce naming of errors in catch blocks (#5763)
3bf9bd1 - chore: enforce src/protocol.d.ts is in sync (#5762)
06d62c0 - chore: migrate src/Browser to TS (#5761)
e03113e - chore: Update protocol.d.ts (#5760)
8ddf4f3 - chore: bump version to 3.0.2-post (#5759)