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spa-dev-server

Front-end application development server with API proxy and live reload, suitable for ESBuild and other bundlers.

[WARNING] It's NOT a production server for static files!

Features

• Static files serving from passed dir.
• Serve index.html from main dir or given indexPath, supports HTML5 history API fallback.
• Proxy API requests to prevent CORS errors.
• Live reload opened tabs with server.livereload.sendReload().
• ESBuild plugin
• Zero dependencies and small size. Server uses http module directly without large production HTTP libraries, like "express".

Installation

npm i spa-dev-server

Usage

Basic

const path = require('path')
const DevSever = require('spa-dev-server')

DevServer.create({
  dir: path.resolve(__dirname, './dist'),
  port: 3000,
  indexPath: path.resolve(__dirname, './http/dev.html'),
});

Custom HTTP server

const http = require('http')
const path = require('path')
const DevSever = require('spa-dev-server')

const server = http.createServer()

DevServer.create({
  server,
  dir: path.resolve(__dirname, './dist')
});

server.listen(3000)

Proxy API requests

const path = require('path')
const DevSever = require('spa-dev-server')

DevServer.create({
  dir: path.resolve(__dirname, './dist'),
  proxy: [
    { filter: /^\/api/, host: "localhost", port: 4000 },
    {
      filter: (req) => req.headers["content-type"] === "application/json",
      host: "localhost",
      port: 8080,
    },
  ],
});

ESBuild

import path from "path";
import DevServer from "spa-dev-server";
import esbuild from "esbuild";

const start = async () => {
  const dir = path.resolve(__dirname, "./dist")
  const server = await DevServer.create({ dir });

  esbuild.build({
    bundle: true,
    entryPoints: ["./src/index.tsx"],
    outdir: dir,
    plugins: [server.getEsbuildPlugin()],
    watch: true,
  });
};

start();

Options

Server Options

type ServerOptions = {
  dir: string; // Build output directory to serve files from
  indexPath?: string; // Custom path to index HTML file
  port?: number // Dev server port. Default: 3000
  proxy?: ProxyOptions[]; // Array of proxy configurations, see ProxyOptions below
  server?: http.Server; // Custom HTTP server
  verbose?: boolean; // Print request logs. Default: true
};

Proxy Options

type ProxyOptions = {
  filter: RegExp | { (req: http.IncomingMessage): boolean }; // Requests should match this filter
  host: string; // Destination server host
  https?: boolean; // Use https. Default: false
  port?: number; // Destination server port
};