Typescript Union Types Development Tutorials, Guides & Insights

You can constrain generics to ensure that the types passed to them meet certain requirements. This is useful when you want to make sure that the generic type has certain properties or methods.

function getProperty<T, K extends keyof T>(obj: T, key: K) {
  return obj[key];
}

const point: Point = { x: 10, y: 20 };
const xValue = getProperty(point, "x");