If you have a node app and you like to print all the routes in your app to see what user can go to you can use this code in index.js that will print all the routers to json file

see_all_routers.js

// Function to recursively find all routes
function listRoutes(router, parentPath = "", routeList = []) {
    if (!router || !router.stack) {
        console.error("Invalid router:", router);
        return routeList;
    }
  
    router.stack.forEach((layer) => {
        if (layer.route) {
            routeList.push({
                path: parentPath + layer.route.path,
                methods: Object.keys(layer.route.methods).join(", ").toUpperCase(),
            });
        } else if (layer.name === "router") {
            const newParentPath = parentPath + layer.regexp.source.replace("^\\/", "").replace("\\/?(?=\\/|$)", "");
            listRoutes(layer.handle, newParentPath, routeList);
        }
    });
    return routeList;
}

// Clean up the routes and remove unwanted characters
const cleanRoutes = (routes) => {
    return routes.map(route => ({
        path: route.path.replace("?(?=\\/|$)", ""),
        methods: route.methods,
    }));
};

// Use the function on app._router instead of app
const allRoutes = listRoutes(app._router);
const cleanedRoutes = cleanRoutes(allRoutes);
const fs = require("fs");
// Save to a JSON file
fs.writeFileSync("cleaned_routes.json", JSON.stringify(cleanedRoutes, null, 4));
console.log("All registered routes have been saved to cleaned_routes.json");