Notejs should get promise versions of its current callback-based APIs:

    const fs = require("fs");
    fs.writeFile("Hello, World", "helloworld.txt", (error)=>{
        if(error) throw error;
        console.log("done!");
    });

Should be:

    const fs = require("fs");
    fs.writeFilePromise("Hello, World", "helloworld.txt").then(()=>console.log("done!"),error=>console.error(error));