Image we are building a blog using AWS Amplify where guest-users can see the posts, authenticated users can read, create and administrators are allowed to do everything they want. Here is a small post of how to configure the auth rules and avoid Access Denied errors.

Step-by-step guide about how to add native code and native components to a Flutter app

Step-by-step guide about how to add native code and native components to a Flutter app

How to generate beautiful embeddable screencasts from your terminal

How JustComments reduces the amount of fetched data with lazy loading resulting in 21.7 KB of downloaded data

AWS Athena allows querying files stored in S3. AWS Kinesis Firehose allows streaming data to S3. But for efficient querying you need to split your data in partitions. Here is how you can automate the process using AWS Lambda

I have heard about Web push notifications and Service Workers many times, but I have never implemented them until the last week for Just Comments. So I decided to share my notes about this technology..

Jekyll is an engine which transforms your content into a static website. Learn how to add comment widget to your static site easily.

Static sites are great! They are easy to publish and maintain. You can scale a static website easily for millions of users. And hosting is normally quite cheap. Another advantage is the convenience of local development and and the possibility to preview any change before publishing. One of the challenges of static websites is adding dynamic content to the site. In this post we add comments to a static website.

As the follow-up to my previous post, I wrote a simple NodeJS server which demonstrates how to implement synchronization of concurrent requests so that certain parts of business logic are not executed twice.

In this post, I discuss the problem of duplicate requests in typical HTTP APIs and how to solve it.

DynamoDB is capable of automatic scaling and I put this feature under test to better understand how it works. See my findings in the post

In this post, we will talk about implementing Single Sign-On with Kerberos

Last few years have dramatically changed JavaScript. Nowadays, a typical JS application is a big code base that involves a few developers and significant efforts. Having a linter in your JS app is a must-have feature. In this post I'll try to encourage developers to use one in their JS apps.

How to properly manage (allocate and dispose) resources in your Node services with the help of Bluebird's Resource Management API: examples with node-postgres, redlock and node-tmp.

In this post, I'll show you a way to make hot reloading work for stylesheets in a non-React project with enabled CSS modules. By the way, it's going to be a hackish way to get things done :)

React 15.3 was released on June 29, 2016 and the first item in release-notes was the support for React.PureComponent, which replaces its predecessor pure-render-mixin. In this article we're going to discuss why this component is so important and where we could use it.

In this tutorial, I present a simple dependency-free starter kit which uses CloudFormation to help you manage NodeJS Lambda functions

How to install specific version of a npm package using npm CLI

Comparison of TestCafe and NightWatch, two popular function test frameworks for web applications

Brief guide on how to run ReactOS in a web browser

This checklist outlines main points that every developer who integrates enterprise APIs should keep in mind in order to create robust and resilient systems

In this post results of performance tests of different flavors of inter-process communication in NodeJS are presented. In particular, the following options are tested: Redis Pub/Sub vs ChildProcess.send vs tcp sockets vs unix sockets

This blog post introduces a hot reloader for Chrome extensions that greatly simplifies the development workflow

This is a short tutorial on how to implement something similar to what next.js does using JSPM ( with server-side rendering and automatic code splitting). Inspired by next.js

In this post I talk about some limitations of APIs developed in enterprises nowadays and in particular about the problem of getting updates via normal HTTP APIs and how it can be solved by applying the Observer pattern.

In the post you will learn how to use timestamp fields without a timezone in PostgreSQL and Node and how to avoid issues with timezones

Ember CLI: How to add external library and related resources to your app. Materialize CSS is used an example to show how to add all Roboto fonts to the app. Read how broccoli-funnel helps to tackle the problem.

Slides presenting major ES6 features and probable ES7 features. Also highlights what features are supported in node 4.2.*, the current LTS release

Executing JS code with Node's VM module: basic usage, performance and safety issues.

A couple of things that don't work in Safari as expected

simple tutorial on using a nodejs library for coupon code generation called coupon-code

A montly digest of notable StackOverflow answers related to Web Development

Learn how to use newly-released MediaRecorder API to shoot videos in the browser

Complete tutorial on implementing formatting routines and connecting them to various parts of your app through computed properties, services and helpers.

A list of 6 things that I consider as best practices when it comes to working with Promises

Read an introduction to Recast and a short tutorial on using it to automate common tasks of source code processing

Using Content Security Policy to Protect Apps against XSS and similar threats

Overview of JS libraries which are able to render PDF files in the browser

A montly digest of notable StackOverflow answers related to Web Development

This tutorial shows how to integrate your Ember or ember-cli app with Analytics.js by Segment - an open-source adapter for various analytics platforms

An example of how to prepare your Ember App for the soon-coming(hopefully) Router service

This post shows a completely cross-browser solution for CSS Blur effects

How to improve your app using Ember Services and Helpers

In this blog post a couple of techniques to avoid memory leaks in Sencha Touch are described

In this blog post, I show how to render a HTMLBars template to a string in Ember 2.0

Last few months we're working really hard on our service Tips by 60 Devs. In this post I would like to share an experience of how we developed an extension for 3 browsers, which problems we encountered and how we solved them.

Tips by 60devs is a micro-donations platform that allows sending money (aka tips) to people who helped you on the Web. In this blog post I explain how we built a nodejs server for it using Koa.js, Redis, PM2 and ES6 generators

Tips is a new social payments platform providing an opportunity to thank developers (and/or others), who helped you out on Stack Overflow, Github or Gitter by sending them money gratuities (tips).

For 1 year of development with Ember I never needed something like this until yesterday. The task was to attach a handler to the `link-to` helper that would run when there is no transition fired by the helper itself (e.g. when the link-to helper points to the current route). In particular, I needed to scroll to the top of the window when no transition happens

The default JSPM workflow is slow for bigger apps. This post is about optimizing the default workflow using nginx and gulp and about making it 10x faster. Demo project included.

There are cases when you need to show your app as soon as possible without waiting for the page to be completely loaded. It's a common requirement for embeddable apps which are injected into a 3rd party web page via asynchronous `script` tag

I use Ember.js and JSPM to build apps. Ember releases usually contain several files: ember.prod.js, ember.debug.js, ember.min.js etc. Ember.debug.js is handy for development and contains some extra code that enables better development process. And ember.prod.js is the version specifically made for production use...

I've made a small research on how various module loaders handle non-js resources and template(hbs) files in particular. I've compared three of them: Webpack, AMD/RequireJS, the one JSPM relies on and the one ember-cli uses

If you develop a modular application for Node.js, you may end up having lots of local node modules which you don't want to publish yet. Nevertheless, you need to use them pretty much like any of the published node modules in order to ease the subsequent publishing

About common pitfalls when working with HTML5 Application cache. Recently I added the HTML 5 application cache to an Ember app. Actually, the app already used the application cache but it didn't work well. For example, the new releases didn't always make it to the users and the app broke because the client part of it was stale and the server part was new.

How do I add Stripe Connect to an Ember app using and Torii

How to set up an Ember project using jspm

How to control display of items using Ember.js View's isVisible property

The article is about Ember.js bindings

The article is about Ember.js observers and how to make them fire on object initialization

The article describes the Web Speech API (speech synthesis and speech recognition) using a simple Ember.js component as an example. The component gets the voice input and sends it to your Ember.js app. Also it can speak back what the API has recognized

Unbound helpers in Ember.js allow product output that does not change of the input data changes. These helpers may improve performance and this article describes some features of the unbound helpers in Ember.js

The article discusses the image sprites to be used with the IMG tag for the content images. The generation of the sprites happens on the fly on the nodejs server