When httpNodeRoot is not slash terminated string, dash-link-button does not work

[cosmo0920]

TL;DR

When I set httpNodeRoot such as /api which is not slash terminated string, dash-link-button does not work.

reprodicible step and code

package.json

{
  "name": "my-node-red-project",
  "version": "0.0.1",
  "description": "An example project to integrate Node-RED into express.",
  "main": "\"\"",
  "dependencies": {
    "node-red": "^0.17.5",
    "node-red-dashboard": "^2.6.2",
    "express": "^4.16.2"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "node-red"
  ],
  "author": "",
  "license": "MIT"
}

app.js

var http = require('http');
var express = require("express");
var RED = require("node-red");

// Create an Express app
var app = express();

// Add a simple route for static content served from 'public'
app.use("/",express.static("public"));

// Create a server
var server = http.createServer(app);

// Create the settings object - see default settings.js file for other options
var settings = {
  httpAdminRoot:"/red",
  httpNodeRoot: "/api",
  functionGlobalContext: { }    // enables global context
};

// Initialise the runtime with a server and settings
RED.init(server,settings);

// Serve the editor UI from /red
app.use(settings.httpAdminRoot,RED.httpAdmin);

// Serve the http nodes UI from /api
app.use(settings.httpNodeRoot,RED.httpNode);

server.listen(8000);

// Start the runtime
RED.start();

and then, access http://localhost:8000/red/ with web browser and click dash-link-button.

I got 404.

Expected result

I can access with /api/ui when clicking dash-link-button.

[cosmo0920]

Thank you for quick fix!