Next JS & Typescript with Shopify Integration - Full Guide

Explore function parameters in TypeScript by building a simple personal info function that logs name and age, using string interpolation and explicit string and number types.

Explore optional parameters in TypeScript by using question marks and defaults, enabling calls with a name only and age defaulting to zero in objects and functions.

Extend interfaces to create specialized person types by adding salary for business person and publications for academic person, while inheriting name and age from the base interface.

Explore union types in TypeScript, see how race car and city car share only common properties like name, and learn narrowing and extraction techniques to work with specific car types.

Explore how the never type enforces exhaustive checks in a union of car types—race car, city car, and SUV car—and propagates changes across the codebase with max speed constraints.

Explore generic object types in TypeScript, learning how to constrain objects by key and value types, use unions, and safely pass object literals to functions.

Learn how to constrain generics with extends in TypeScript, using a Laguerre class and a Person interface to ensure implemented classes provide required properties.

Explore using a generic single type with the ternary operator to derive the single element type from array types of string, number, or a person interface in TypeScript.

Learn to infer the return type of a promise in TypeScript and apply it to function arguments, using async/await and precise props typing for reliable data handling.

Create a reusable, framework-based get all products module for Shopify that returns a hard-coded product list, with export default and an asynchronous, typed promise for future data fetching.

Implement a fetch api function in a Next.js and TypeScript context to request product data from a placeholder endpoint, parse the json response, and return the data for rendering.

Learn to fetch all Shopify products with a GraphQL query in a Next.js and TypeScript app, building a reusable getAllProducts utility to expose product edges, node data, and images.

Move the fetch API to a dedicated utils module and import it in the products fetch flow. Implement robust error handling with fallbacks using ?? and the || operator.

Develop a normalize product images function that converts a Shopify image connection into a normalized image array, mapping edges to image objects with url, alt text, and height.

Learn to simplify imports by creating index files in the utils folder to re-export modules like fetch API, get all products, and normalize product, using default and named exports.