TSConfig

This disables reporting of excess property errors, such as the one shown in the following example:

ts
type Point = { x: number; y: number };
const p: Point = { x: 1, y: 3, m: 10 };
Object literal may only specify known properties, and 'm' does not exist in type 'Point'.2353Object literal may only specify known properties, and 'm' does not exist in type 'Point'.Try

This flag was added to help people migrate to the stricter checking of new object literals in TypeScript 1.6.

We don’t recommend using this flag in a modern codebase, you can suppress one-off cases where you need it using // @ts-ignore.