Flow

// Imports
import Flow from "https://deno.land/x/flow/mod.ts";

// deno-lint-ignore no-explicit-any
const flow = new Flow<(num: number) => any>();

flow.use(
    async (num, next) => {
        console.log("The magic number is:", num);
        await next();
    },
    // deno-lint-ignore no-explicit-any
    new Flow<(num: number) => any>(
        async (num, next) => {
            console.log("Hi from sub middleware.");
            await next();
        }
    ),
    async (_, next) => {
        await next();
        console.log("Done");
    },
    num => console.log(num),
    num => console.log("You won't see this.")
);

// Run the flow.
await flow.run(1);