General · Learning hub

OAuth cheat sheet & developer notes

OAuth cheat sheet and 2 curated developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · OAuth

Roles, Tokens & the Authorization Code Flow

Roles, Tokens & the Authorization Code Flow. Authorization, Not Authentication. OAuth 2.0 lets a user grant a third-party app limited access to their resources on another service — WITHOUT sharing their password. It solv…

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02 · OAuth

PKCE, Refresh Tokens & OpenID Connect

PKCE, Refresh Tokens & OpenID Connect. Confidential vs. Public Clients & PKCE. A confidential client (server-side web app) can hold a secret safely. A public client (mobile app, SPA) can't — its code is visible to the us…

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Interview Questions

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Advanced Types (Generics & Utility Types)

TypeScript Advanced Types. Generics. // Generic function function identity<T>(arg: T): T { return arg; } const num = identity<number>(42); // Explicit const str = identity('hello'); // Inferred //…

Mar 3, 2026

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