AI Prompts for ChatGPT for TypeScript

I need to model a [DOMAIN CONCEPT] in TypeScript. The data has [DESCRIBE FIELDS AND RELATIONSHIPS]. Write a set of interfaces and types that capture this accurately, using union types, optional fields, and generics where appropriate.

Design a discriminated union type for [STATE/EVENT SYSTEM] that has these possible states: [LIST STATES]. Each state has different data. Show me the type definition and a type guard for each variant.

I have this plain JavaScript object shape: [PASTE OBJECT]. Convert it to a strict TypeScript interface, infer the best types for each field, and flag any fields that should be enums or literals.

Create a generic utility type that [DESCRIBE TRANSFORMATION, E.G. "MAKES ALL NESTED PROPERTIES READONLY" OR "EXTRACTS KEYS WITH A SPECIFIC VALUE TYPE"]. Show how to apply it to this existing type: [PASTE TYPE].

I need to type a function that accepts [DESCRIBE FLEXIBLE INPUT] and returns [DESCRIBE OUTPUT]. Write the overloaded function signatures and the generic version, explaining when to use each.

Write a generic function that [DESCRIBE BEHAVIOR, E.G. "GROUPS AN ARRAY BY A KEY"]. It should infer the return type correctly so callers get full autocomplete. Show usage examples with two different input types.

I want to create a type-safe event emitter in TypeScript. The events are defined in this map: [PASTE EVENT MAP]. Write the class with fully typed on(), off(), and emit() methods.

Explain how to use conditional types to build a type that [DESCRIBE CONDITION, E.G. "UNWRAPS A PROMISE TYPE" OR "FLATTENS A NESTED ARRAY TYPE"]. Show the implementation and three use cases.

I have a function that returns different shapes based on an input flag: [DESCRIBE FUNCTION]. Rewrite it using function overloads so TypeScript knows exactly which return type to expect for each input.

Write a type-safe builder pattern for [DESCRIBE OBJECT, E.G. "A QUERY BUILDER" OR "A FORM CONFIG"]. Each method call should narrow the type so required fields must be set before build() is called.

I am fetching data from this API endpoint: [DESCRIBE RESPONSE SHAPE]. Write the TypeScript types for the response, a typed fetch wrapper that handles errors, and a usage example.

I need to type a Redux or Zustand store for [DESCRIBE FEATURE]. Write the state interface, action types, and typed selectors. Show how to handle async actions with proper loading and error states.

Convert this configuration object to use satisfies and const assertion: [PASTE CONFIG]. Explain what each keyword adds and why this is better than a plain type annotation.

I want to add strict null checking to this existing codebase function: [PASTE FUNCTION]. Identify all the places where null or undefined could cause a runtime error and show how to fix each one safely.

Write a typed React hook for [DESCRIBE HOOK PURPOSE, E.G. "FETCHING AND CACHING USER DATA"]. The hook should have typed parameters, return typed values, and handle loading and error states.

I am getting this TypeScript error: [PASTE ERROR MESSAGE AND RELEVANT CODE]. Explain exactly why this error occurs, what TypeScript is protecting me from, and show two ways to fix it correctly.

I have this JavaScript file I want to convert to TypeScript: [PASTE CODE]. Add types progressively, starting with function signatures, then variables, then generics. Flag anything that needs runtime validation.

My TypeScript config is too permissive and I want to enable strict mode. Here is my current tsconfig.json: [PASTE CONFIG]. Walk me through what each strict flag enables and which ones to turn on first.

I keep seeing "any" types in this codebase: [PASTE FILE EXCERPT]. Replace every any with a proper type, using unknown where the type is truly unknown and adding type guards where needed.

Explain the difference between these type patterns I am confused about: [LIST PATTERNS, E.G. "INTERFACE VS TYPE ALIAS", "UNKNOWN VS ANY", "AS CONST VS SATISFIES"]. Give concrete examples showing when to use each.