Frontend interview articles

Mapped Types, keyof, and Template Literal Types (Interview-Ready)

How keyof + mapped types work, and how template literal types unlock powerful typed APIs.

#Generics#Interviews

Typing React Components in TypeScript (Practical Patterns)

Props, children, event handlers, generics in components, and common TS + React pitfalls interviewers ask about.

#React#Interviews

Enums vs Union Types (and const enums)

When to use enums, when to prefer string unions, and what const enums change.

tsconfig.json: The Settings That Matter

A practical guide to TS compiler options interviewers ask about: strict, noImplicitAny, lib, moduleResolution, jsx, and incremental builds.

TypeScript4 min read

TypeScript Declaration Merging: Examples & Common Errors

Learn TypeScript declaration merging with working interface and module augmentation examples, common compiler errors, and an interview exercise.

Conditional Types + infer (Interview Essentials)

Understand conditional types, infer, and how TypeScript extracts types from functions/promises/arrays.

#Generics#Interviews

The `satisfies` Operator (Why It’s a Big Deal)

How `satisfies` helps validate shapes without losing literal types, and why it often beats `as const` and type annotations.

Type Guards & Narrowing Patterns

How narrowing works in TypeScript: typeof/in, custom type guards, assertion functions, and practical patterns for safer code.