Alosaur - Deno web framework

Alosaur 🦖

Alosaur - Deno web framework 🦖.

  • Area - these are the modules of your application.
  • Controller - are responsible for controlling the flow of the application execution.
  • Middleware - provide a convenient mechanism for filtering HTTP requests entering your application.
  • Hooks - middleware for area, controller and actions with support DI. Have 3 life cyclic functions: onPreAction, onPostAction, onCatchAction
  • Decorators - for query, cookie, parametrs, routes and etc.
  • Dependency Injection - for all controllers by default from microsoft/TSyringe (more about alosaur injection).
  • Render pages any template render engine More



Simple example


import { Controller, Get, Area, App } from '';

@Controller() // or specific path @Controller("/home")
export class HomeController {
    @Get() // or specific path @Get("/hello")
    text() {
        return 'Hello world';

// Declare module
    controllers: [HomeController],
export class HomeArea {}

// Create alosaur application
const app = new App({
    areas: [HomeArea],


    "compilerOptions": {
        "experimentalDecorators": true,
        "emitDecoratorMetadata": true

And run

deno run --allow-net --allow-read --config ./ app.ts


  • Add render views: Dejs and Handlebars

  • Add return value JSON

  • Add decorators:

  • @Area

  • @QueryParam

  • @Param param from url: /:id

  • @Body

  • @Cookie

  • @Req

  • @Res

  • @Middleware with regex route

  • @UseHook for contoller and actions

  • Support create custom decorators with app metadata

  • Add middleware

  • Add static middleware (example: app.useStatic)

  • Add CORS middleware

  • Add SPA middleware

  • Add DI

  • Add std exceptions

  • Add CI with minimal tests.

  • Add OpenAPI v3 generator (see /examples/basic/openapi.ts)

  • Add OpenAPI type reference

  • Add Hooks example

  • Add WebSocket

  • Add SRE

  • Add validators example class-validator

  • Add microservice connector with WASM

  • Add benchmarks

  • Transfer to Alosaur github organization

  • Add docs and more examples

  • Plugins & modules

  • Add Angular render engine

  • Add CLI with schematics (

  • Examples

  • Add basic example

  • Add DI example

  • Add static serve example

  • Add Dejs view render example

  • Add example with SQL drivers (PostgreSQL)

  • Add basic example in Docker container

  • Add WebSocket example

  • Add example with WASM

OpenAPI v3

Example in examples/basic/openapi.ts

Generate OpenAPI file:

deno run -A --config ./src/tsconfig.lib.json examples/basic/openapi.ts


You can create middleware and register it in area or all application layer.

@Middleware(new RegExp('/'))
export class Log implements MiddlewareTarget<TState> {
    date: Date = new Date();

    onPreRequest(context: Context<TState>) {
        return new Promise((resolve, reject) => {
   = new Date();

    onPostRequest(context: Context<TState>) {
        return new Promise((resolve, reject) => {
            console.log(new Date().getTime() -;

Register in app settings

const settings: AppSettings = {
    areas: [HomeArea, InfoArea],
    middlewares: [Log],

or in app

const app = new App(settings);

app.use(/\//, new Log());


Hooks - middleware for area, controller and actions with supports DI container.

Hook in Alosaur there are three types: onPreAction, onPostAction, onCatchAction.

type PayloadType = string; // can use any type for payload
type State = any;

export class MyHook implements HookTarget<State, PayloadType> {

  // this hook run before controller action
  onPreAction(context: Context<State>, payload: PayloadType) {
      // you can rewrite result and set request immediately
      context.response.result = Content({error: {token: false}}, 403);
      // if response setted immediately no further action will be taken

  // this hook run after controller action
  onPostAction(context: Context<State>, payload: PayloadType) {
    // you can filtered response result here

  // this hook run only throw exception in controller action
  onCatchAction(context: Context<State>, payload: PayloadType) {



@UseHook(MyContollerHook) // or @UseHook(MyHook, 'payload') for all actions in controller
export class HomeController {

    @UseHook(MyHook, 'payload') // only for one action
    text(@Res() res: any) {
        return ``;

Global error handler

Errors that haven’t been caught elsewhere get in here

const app = new App(
// app settings

// added global error handler
app.error((context: Context<any>, error: Error) => {
  context.response.result = Content("This page unprocessed error", (error as HttpError).httpCode || 500);

Action outputs: Content, View, Redirect

There are 3 ways of information output

  • Content similar return {}; by default Status 200 OK
  • View uses with template engine, return View("index", model);
  • Redirect and RedirectPermanent status 301,302 return Redirect('/to/page')
return {}; // return 200 status

// or
return Content("Text or Model", 404); // return 404 status

// or 
return View("page", 404); // return 404 status

Render pages

Alosaur can suppport any html renderer. All you have to do is define the rendering function in the settings. For example DejsHandlebarsAngular

// Handlebars
// Basedir path
const viewPath = `${Deno.cwd()}/examples/handlebars/views`;

// Create Handlebars render
const handle = new Handlebars();

    type: 'handlebars',
    basePath: viewPath,
    getBody: async (path: string, model: any, config: ViewRenderConfig) => await handle.renderView(path, model),


Handlebars support custom config, more about handlebars for deno

 new Handlebars(
        baseDir: viewPath,
        extname: '.hbs',
        layoutsDir: 'layouts/',
        partialsDir: 'partials/',
        defaultLayout: 'main',
        helpers: undefined,
        compilerOptions: undefined,

Transformers and validators

You can use different transformers

For example class-validator and class-transformer for body


import validator from "";

const { Length, Contains, IsInt, Min, Max, IsEmail, IsFQDN, IsDate } =

export class PostModel {
  @Length(10, 20)
  title?: string;

  text?: string;

  rating?: number;

  email?: string;


import validator from "";
import transformer from "";
import { App, Area, Controller, Post, Body } from '';
import { PostModel } from './post.model.ts';

const { validate } = validator;
const { plainToClass } = transformer;

// Create controller
export class HomeController {

    async post(@Body(PostModel) data: PostModel) {

        return {
            errors: await validate(data)

// Declare controller in area
    controllers: [HomeController],
export class HomeArea { }

// Create app
const app = new App({
    areas: [HomeArea],

// added tranform function
    type: 'body', // parse body params
    getTransform: (transform: any, body: any) => {
        return plainToClass(transform, body);

// serve application

You can also use just a function instead of a transformer.

function parser(body): ParsedObject {
    // your code
    return body;

post(@Body(parser) data: ParsedObject) {


Custom Decorators

You can add any decorator and put it in a DI system.

Example with hooks:

import {
} from "";

type AuthorizeRoleType = string | undefined;

 * Authorize decorator with role
export function Authorize(role?: AuthorizeRoleType): Function {
  return function (object: any, methodName?: string) {
    // add hook to global metadata
      type: methodName ? BusinessType.Action : BusinessType.Controller,
      target: object.constructor,
      method: methodName,
      instance: container.resolve(AutorizeHook),
      payload: role,

export class AutorizeHook implements HookTarget<unknown, AuthorizeRoleType> {
  onPreAction(context: Context<unknown>, role: AuthorizeRoleType) {
    const queryParams = getQueryParams(context.request.url);

    if (queryParams == undefined || queryParams.get("role") !== role) {
      context.response.result = Content({ error: { token: false } }, 403);

Then you can add anywhere you want. For example action of controller:

  // ..controller

  // action
  getAdminPage() {
    return "Hi! this protected info";

Download Details:

Author: alosaur


#deno #nodejs #javascript

What is GEEK

Buddha Community

Alosaur - Deno web framework

Ajay Kapoor


10 Top Web Development Frameworks for Assured Success of Your Project - PixelCrayons

Web development frameworks are a powerful answer for businesses to accomplish a unique web app as they play a vital role in providing tools and libraries for developers to use.

Most businesses strive to seek offbeat web applications that can perform better and enhance traffic to the site. Plus, it is imperative to have such apps as the competition is very high in the digital world.

Developers find it sophisticated to use the libraries and templates provided by frameworks to make interactive and user-friendly web applications. Moreover, frameworks assist them in increasing the efficiency, performance, and productivity of the web development task.

Before getting deep into it, let’s have a quick glance at the below facts and figures below that will help you comprehend the utility of the frameworks.

As per Statista, 35.9% of developers used React in 2020.
25.1% of developers used the Angular framework worldwide.
According to SimilarTech, 2,935 websites use the Spring framework, most popular among the News and Media domain.

What is a Framework?
A framework is a set of tools that paves the way for web developers to create rich and interactive web apps. It comprises libraries, templates, and specific software tools. Additionally, it enables them to develop a hassle-free application by not rewriting the same code to build the application.

There are two categories of frameworks: the back-end framework, known as the server-side, and the front-end framework, known as the client-side.

The backend framework refers to a web page portion that you can not see, and it communicates with the front end one. On the other hand, the front-end is a part of the web that users can see and experience.

You can understand by an example that what you see on the app is the front-end part, and the communication you make with it is the part of the back end.

Read the full blog here

Hence, depending on your web development application requirements, you can hire web developers from India’s best web development company. In no time, you will be amongst those who are reaping the results of using web development frameworks for the applications.

#web-development-frameworks #web-frameworks #top-web-frameworks #best-web-development-frameworks

Any Alpha

Any Alpha


Top 3 Golang Web Frameworks In 2021

Golang is one of the most powerful and famous tools used to write APIs and web frameworks. Google’s ‘Go’ otherwise known as Golan orders speedy running local code. It is amazing to run a few programming advancements rethinking specialists and software engineers from various sections. We can undoubtedly say that this is on the grounds that the engineers have thought that it was easiest to utilize Go. It is always considered as ago for web and mobile app development because it is ranked highest among all the web programming languages.

Top 3 Golang web frameworks in 2021:

1.Martini: Martini is said to be a low-profile framework as it’s a small community but also known for its various unique things like injecting various data sets or working on handlers of different types. It is very active and there are some twenty and above plug-ins which could also be the reason for the need for add-ons. It deals with some principles of techniques like routing, dealing, etc, basic common tricks to do middleware.

2.Buffalo: Buffalo is known for its fast application development services. It is a complete process of starting any project from scratch and providing end to end facility for back-end web building. Buffalo comes with the dev command which helps directly to experience transformations in front of you and redevelop your whole binary. It is rather an ecosystem used to create the best app development.

3.Gorilla: Gorilla is the largest and longest-running Go web framework. It can be little and maximum for any user. It is also the biggest English-speaking community that comes with robust web sockets features so you can attach the REST codes to the endpoints giving a third-party service like Pusher.

So, these are some web frameworks that can be used for Golang language. Each framework has its unique points which are only found in them but all of them are the best. IF your developer is in search of one this is where you can find the best.

#top 3 golang web frameworks in 2021 #golang #framework #web-service #web #web-development

Top 15 Free JavaScript Frameworks for Web Applications

List of some useful JavaScript Frameworks and libraries for website, web apps, and mobile apps development, that developers should know about to make selection easier.
This article will help you understand the various types of JavaScript Framework available in the market. When it comes to choosing the best platform for you, it’s not only the number of features you need to consider but also its functionality. The ease with which it fits within your project is also an essential factor. The next step is to choose the framework that best fits your company requirements or you can select the best from the list of top web development companies to develop your product based on your requirements.

#javascript frameworks for web applications #web applications development companies #progressive javascript framework #javascript frameworks #javascript #frameworks

Evolution in Web Design: A Case Study of 25 Years - Prismetric

The term web design simply encompasses a design process related to the front-end design of website that includes writing mark-up. Creative web design has a considerable impact on your perceived business credibility and quality. It taps onto the broader scopes of web development services.

Web designing is identified as a critical factor for the success of websites and eCommerce. The internet has completely changed the way businesses and brands operate. Web design and web development go hand-in-hand and the need for a professional web design and development company, offering a blend of creative designs and user-centric elements at an affordable rate, is growing at a significant rate.

In this blog, we have focused on the different areas of designing a website that covers all the trends, tools, and techniques coming up with time.

Web design
In 2020 itself, the number of smartphone users across the globe stands at 6.95 billion, with experts suggesting a high rise of 17.75 billion by 2024. On the other hand, the percentage of Gen Z web and internet users worldwide is up to 98%. This is not just a huge market but a ginormous one to boost your business and grow your presence online.

Web Design History
At a huge particle physics laboratory, CERN in Switzerland, the son of computer scientist Barner Lee published the first-ever website on August 6, 1991. He is not only the first web designer but also the creator of HTML (HyperText Markup Language). The worldwide web persisted and after two years, the world’s first search engine was born. This was just the beginning.

Evolution of Web Design over the years
With the release of the Internet web browser and Windows 95 in 1995, most trading companies at that time saw innumerable possibilities of instant worldwide information and public sharing of websites to increase their sales. This led to the prospect of eCommerce and worldwide group communications.

The next few years saw a soaring launch of the now-so-famous websites such as Yahoo, Amazon, eBay, Google, and substantially more. In 2004, by the time Facebook was launched, there were more than 50 million websites online.

Then came the era of Google, the ruler of all search engines introducing us to search engine optimization (SEO) and businesses sought their ways to improve their ranks. The world turned more towards mobile web experiences and responsive mobile-friendly web designs became requisite.

Let’s take a deep look at the evolution of illustrious brands to have a profound understanding of web design.

Here is a retrospection of a few widely acclaimed brands over the years.

From a simple idea of renting DVDs online to a multi-billion-dollar business, saying that Netflix has come a long way is an understatement. A company that has sent shockwaves across Hollywood in the form of content delivery. Abundantly, Netflix (NFLX) is responsible for the rise in streaming services across 190 countries and meaningful changes in the entertainment industry.


The idea of Netflix was born when Reed Hastings and Marc Randolph decided to rent DVDs by mail. With 925 titles and a pay-per-rental model, debuts the first DVD rental and sales site with all novel features. It offered unlimited rentals without due dates or monthly rental limitations with a personalized movie recommendation system.

Netflix 1997-2000


Announcing its initial public offering (IPO) under the NASDAQ ticker NFLX, Netflix reached over 1 million subscribers in the United States by introducing a profile feature in their influential website design along with a free trial allowing members to create lists and rate their favorite movies. The user experience was quite engaging with the categorization of content, recommendations based on history, search engine, and a queue of movies to watch.

Netflix 2001-2005 -2003


They then unleashed streaming and partnering with electronic brands such as blu-ray, Xbox, and set-top boxes so that users can watch series and films straight away. Later in 2010, they also launched their sophisticated website on mobile devices with its iconic red and black themed background.

Netflix 2006-2010 -2007


In 2013, an eye-tracking test revealed that the users didn’t focus on the details of the movie or show in the existing interface and were perplexed with the flow of information. Hence, the professional web designers simply shifted the text from the right side to the top of the screen. With Daredevil, an audio description feature was also launched for the visually impaired ones.

Netflix 2011-2015


These years, Netflix came with a plethora of new features for their modern website design such as AutoPay, snippets of trailers, recommendations categorized by genre, percentage based on user experience, upcoming shows, top 10 lists, etc. These web application features yielded better results in visual hierarchy and flow of information across the website.

Netflix 2016-2020


With a sleek logo in their iconic red N, timeless black background with a ‘Watch anywhere, Cancel anytime’ the color, the combination, the statement, and the leading ott platform for top video streaming service Netflix has overgrown into a revolutionary lifestyle of Netflix and Chill.

Netflix 2021

Contunue to read: Evolution in Web Design: A Case Study of 25 Years

#web #web-design #web-design-development #web-design-case-study #web-design-history #web-development

Top 10 Web Application Frameworks

From a wide variety of Web Application Development Frameworks, it is eternally tough to pick the one framework that is completely satisfied with the project. Here, Top 10 Web Application Frameworks Describe in detail.

#web application frameworks #top web application frameworks #server-side web frameworks