PathArgs.ts

type RouteData = PathArgs<"/company/:companyId/customer/:customerId/vendor-user/:vendorUserId">;
                                                //        .
                                                //       /|\
var routeData: RouteData = {                    //        |
    companyId: "",// <-- Strong typed based on URL        |
    customerId: "",// <-- Strong typed based on URL       |
    vendorUserId: "", // <-- Strong typed based on URL    |
};


// The magic 
type PathParams<Path extends string> =
    Path extends `:${infer Param}/${infer Rest}` ? Param | PathParams<Rest> :
    Path extends `:${infer Param}` ? Param :
    Path extends `${infer _Prefix}:${infer Rest}` ? PathParams<`:${Rest}`> :
    never;

type PathArgs<Path extends string> = {
    [K in PathParams<Path>]: string
};