Web APIs Code Completion Exercises

Choose a Web API and complete its missing calls and flags directly in the example.

Code-completion exercises for the Web APIs learning series, grouped by API.

Code completion

Practice by API

Choose a Web API to open its exercises in this format.

Beacon API
Complete real Beacon API calls — payloads, CORS-safe types, quota handling, and transport choices — by filling in the missing code.
12Code completion