FE Dev Server target to help frontend web developers create view template, styles and js easily.





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FE Dev Server build status

FE Dev Server target to help frontend web developers create view template, styles and js easily. It try the best to simulate real server environment which can help you to make you job done.


  1. Various template engines and embedded page data.
  2. Url simulation
  3. Mock data in file
  4. Proxy configuration

Quick start

Install it as a command line tool with the following step:

Install module globally

$ npm install -g fe-dev-server

create project folder and get into the folder

$ mkdir workdir && cd workdir

initial the project folder

$ fds init

start up server

$ fds

start up server & open browser

$ fds -o

Also, it can be integrated into your own project as a node module.

var fds = require('fe-dev-server');

var app = fds({
    basePath: __dirname,
    mockFolder: 'data',
    port: 8001  


Routes is stored in routes.js as key/value pairs by default.


module.exports = {
    // set /test route to test.html page, default http method is GET
    '/test':                    'test.html',
    // set /books route to books.jade template with GET method
    'GET::/books':              'books.jade',
    // set json api with a json file in mock folder
    'POST::/api/books':         'mock::books.json',
    // mock file can also be a js file, which has more power to do the customization
    'GET::/api/category':       'mock::category.js',

    // fds works with java template such as jsp;
    // before do this, you have to set enableJava to true in your fds-config.js file
    '/jsp-page':                'books.jsp',
    // it allow your route to proxy an online page
    '/proxy-api':               'http://www.github.com/zhex.json',
    // proxy can do fuzzy mapping;
    // in the setting, if you visit /books/hello, it will map to http://example.com/books/hello
    'ALL::/books/:pattern*':    'http://example.com/books/'

the rule is '[method]::[route_url]': '[template_file]'.

Allowed method: GET, POST, PUT, PATCH, DETELE

GET will be used if it is not specified.

If you want to setup an ajax api url, you can set the template to a json file. The server will look for the json/js file in view folder and send back it as a json object. the data in the view folder sounds not make sense. So if you want put the json/js file in the mock folder, then you can add a mock:: prefix in the template path, then the server will look for the file in mock folder.

If the mock file is a js file, then it is good to define as a module function:

module.exports = function (data, utils) {
    return {
        id: data.params.id,
        name: data.query.name || 'hello world',
        content: data.body.content

The data.params is the match variable collection in the particular route; The data.query is the query data from request url, so you can easily test your page with different api return.

utils provide some easy to use method to handle the data.

available method:

  • utils.isObject(obj)
  • utils.isArray(obj)
  • utils.isFunc(obj)
  • utils.contains(array, item)
  • utils.serialize(obj)
  • utils.assign() - which is object-assign library
  • utils.moment() - which is moment library
  • utils.Mock - which is mockjs library

Also, you can add $$header in the data file to extend http response header, and using $$delay to set simulate the http connection delay.

    "$$header": {
        "x-access-token": "abcs"
    "$$delay": 3000,
    "title": "hello world"

embedded template engines


You can custom your configuration in fds-config.js file.

defaultConfig = {
    basePath: path.resolve(__dirname, './example'),
    publicFolder: 'public',
    viewFolder: 'views',
    mockFolder: 'mocks',
    routeFile: 'routes.js',
    port: 3000


The base path of the project, all other folder settings are related to base path.


default: 'views'

Where you can put your view template files.


default: 'mocks'

Save you mock data into this folder. each view template will have a matched json data file will be loaded automatcially.

For example: we have a ${viewFolder}/projects/index.html template, then data in ${viewFolder}/projects/index.json file will be auto loaded into the template.


default: 'public'

Where you can put your image, style and js files here. This folder is set by express.static()


default: 'routes.js'

Routes mapping file


default: ['.js', '.json']

Some people like to set mockFolder as the same as viewFolder for convinence reason, mockExts give you the ability to define your own mock file type to avoid the conflict issue. Also, the ext order in array demonstrate the priority from higher to lower.

proxy (Deprecated, using router proxy instead)

default: null

During the test, we want to get the api data from the real backend server; then we can proxy the url to the backend server. And multiple proxies are allowed.

proxy: {
    '/api': 'http://www.example.com/api'


default: 3000

Express server port


default: true

Sometimes you don't need to support java templates, you can turn it off with this property to false.

javaServerPort (Deprecated, port will be auto generated)

default: 12321

FE server will run a child process for light java server to serve the templates in java, you can change the java server port if it is conflict with your other service.


default: true

livereload is awesome, it will refresh your browser automatically after anything changed. If you dont like this feature, you can set it to false to switch it off. also you can set it as a livereload option object;


default: { route: '/', browser: ['google chrome'] }

Browser setting allow you to open dev site automatically on server started with -o option in cli. It will open google chrome by default.

$ fds -o


This project is licensed under the terms of the MIT license.

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