⚙ Compilation target

esnext

⚙ Library

esnext

Missing / Incorrect Definition

NumberConstructor(value?: any): number:

This is correct but I think could be improved to work better when converting string literals to numbers by returning number literals. This could be achieved by doing something like

<T>(value?: T): T extends `${infer N extends number}` ? N : number;

See this playground link

Sample Code

const A = "12";
const B: 12 = Number(A);  // Type 'number' is not assignable to type '12'.

const A2: "12" | "13" | "14" = "12";
const B2: 12 | 13 | 14 = Number(A2);  // Type 'number' is not assignable to type '12 | 13 | 14'.

Documentation Link

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/Number