Docker
Nginx Load Balancer with docker has become a fine recipe for managing services in closed systems. Although services like Kubernetes provide container orchestration, sometimes architecturally it could be an overkill. In this example, I will be showing how to use docker services using Nginx load balancer.
Read more “Nginx Load Balancer with docker for nodejs services”
JavaScript
Here we are discussing creating react app using npx create-react-app. npx comes with npm 5.2 and higher.
Prerequisite: You need to install Node >= 8.10 on your machine.
npx create-react-app my-app
create-react-app set up the main structure of the application.
Important: If you previously installed create-react-app using npm, uninstall before using npx. Because npx always refer the latest version of libraries.
JavaScript
npx comes bundled with npm version 5.2+.
If you want to run a package using npm, you must specify that package in your package.json file and install a package locally on a project:
npm install package-name
npx is a npm package runner.
JavaScript
This article will guide you on how to create a simple tab component using the react-tabs library.
Install react-tabs using
yarn add react-tabs why yarn ?
JavaScript
Let’s assume we are creating “helloWorld.jsx” like below, you can see there is a compilation error display as “’React’ must be in scope when using JSX react/react-in-jsx-scope.”
const element = <h1>Hello World!</h1> export default element;
This happens due to “React” import necessary in JSX file.The React library must also always be in scope from JSX code. To overcome this error “import React from “react”;” must be added into the file as follows.
Read more “The Common Errors that beginner React Developers Make”
FCM
If you are new to firebase and FCM this article will be useful to setup FCM Push Notification with React Native application. We will be using react-native-firebase(doc: https://rnfirebase.io/docs/v5.x.x/getting-started) module to retrieve token for the push notifications.
First, create the Firebase account and download the google-services.json file from the console.
Read more “How to setup FCM Push Notification with React Native App” 
Apollo Client
Query definition in GraphQL is will be something you know now but not mastered. If you were going through the pages to troubleshoot frequent errors with Apollo Client which makes no sense, this post might help. First, the reason to create this post is,
And most importantly if I get into a trouble again, I can refer this 😉 Read more “Query definition in GraphQL and frequent errors with Apollo Client”
AppSync
Recently, I had to create a AWS Lambda trigger for the AWS DynamoDB table events. The tricky part on this thing was to mutate AWS GraphQL using AWS Lambda with this DynamoDB event. The reason was I wanted all the clients which were subscribed to GraphQL to get this event with modified data.
AppSync
Recently I came up with a react native app which needs to integrate AWS GraphQL. Its actually provided with AWS App Sync and a very convenient way if you want a quick pub-sub. The problem was I had to do mutations as a background asynchronous process and wanted to update the app state from that. When I went through the documents I found the AWSAppSyncClient which is an Apollo Client. Although it was promising the react native examples were more focusing towards react or react-native Components which was really making a mess. Read more “Use AWS GraphQL for React Native Message App”
JavaScript
Recently I got the opportunity to use DatePicker of antd library https://ant.design/components/date-picker/ for a react.js project. It was really cool to use that until I found it was using the whole antd library to import this single antd components. It wasn’t right and there was a solution introduced by the antd team. I just blogged it for anyone who will find it interesting. Read more “How to use antd components without the whole library”
Express.js
In this post, I would like to share a Modular Approach to create API generated with express.js. The modular approach which discussed here is having a module which can perform each and every task relevant to the API. It has following features. Read more “A Modular Approach to create API using Express.js and Node.js”
JavaScript
There are some instances where you need to debounce and avoid multiple clicks/taps on a button so that it will not generate the same action chain immediately with a consecutive click. An example would be an application with a touchscreen. If you click a button rapidly, that event will be generated more than once. As a solution, most of the time devs would block the UI until the action chain is completed. But this would be a bad experience if the user is blocked for any other interactions. A typical example can be a fetch call to update the state and if the invocation is asynchronous it could be causing more inconvenience.
Read more “Debounce and avoid multiple clicks event generation on React.js components using Lodash”
Express.js
This guide will take you through on how to use nodemon to build api which is simply to create a web app with node.js + express.js in a babel environment. Often we need to use babel to increase readability of our code. And nodemon was used to watch and re-build the project and serve it consistently. Read more “babel + express.js + node.js + nodemon to build API with hot reloading”
Java
Recently I came across Vertx toolkit (http://vertx.io/docs/) when I was building an API. What I needed was to build a simple server to connect a javascript app and transfer message in between. So before going into more details lets discuss what Vertx toolkit has to offer and then create a Vertx Eventbus js client. Read more “How to create a Vertx EventBus js client and use it with a web server with CORS”
EmberJS
Through the last couple of years, javascript has drastically changed and the many developers have tried using different approaches to define their application structure and abstractions in a way which is best suits at that time. There is one thing to highlight which I intend to discuss, “Rapid Changes”. So how can a developer or an architect withstand these rapid changes to frameworks and awesome libraries introduced each day in the js context? With my experience, I learned a couple of facts which I think is necessary to embrace these changes until js development becomes structurally solid as engineered buildings. Read more “Adaptation of js apps and how predesigned abstractions could burn you”
JavaScript
Recently I happened to create a middle panel where different types of components could be rendered on top it. So the idea is, the panel should be a <div> wrapper around the middle content. For this kind of situation, higher order functions with components could come in handy to use. Read more “Higher order component wrappers using React.js and reusable components.”
JavaScript
This guide will simply cover to embed SASS support in React.js project.
First, install node-sass and sass-loader npm packages.
Yarn: yarn add sass-loader --dev
yarn add node-sass
NPM: npm install node-sass
npm install sass-loader --save-dev
JavaScript
Dynamic segments are quite useful for any applications to give a better understanding for the user and for SEO plugins to make the site search engine friendly.
Read more “Use Dynamic Segments Routing in Ember 2.0 without Data Models”
JavaScript
Ember has defined its architecture as data down, actions up manner so that the component hierarchy can be maintained properly. But some simple implementations are there that can be confusing in the action definition.
Read more “Ember sendAction in components to parent components”