Introduction

Typescript is awesome! It allows developers to use primitive and user-defined types in javascript. Lately, more and more javascript frameworks are providing firsthand Typescript support; Angular, Vue, NodeGUI and many more.

If you haven’t tried it out yet, I would highly recommend it. You can get started here.

Disclaimer: This tutorial assumes basic knowledge of javascript and typescript. If you’re not familiar with them, use the resources provided above to learn more before continuing with the rest of the article!

Let us now look at a few different “types” in typescript and how they can be used.

Optional types

Most readers probably…

Introduction

React introduced hooks in the v16.8 release and they’re just plain fantastic! They’ve enabled developers to extract business logic out from components that weren’t otherwise possible with class-based components. This not only made the code shorter and cleaner but also provisioned for the sharing of logic and not just UI components in react code. If you’re new to hooks and want to learn more about them, head over to the official documentation.

React has extracted a lot of its functionalities out as hooks - state, effects (component lifecycle methods, basically), refs, context and much more. But, along with all this…

Ever wondered how facebook’s create-react-app handles the bundling and bootstrapping behind the abstraction of yarn build? Let’s try to bootstrap our own react application using webpack 4 and babel. 😸

I’ll be using yarn through this article but please if you use npm, well, that’s fine too. 😁

What is webpack and babel?

Essentially, converting any es5+ code to its browser compatible version is a two step process; Transpiling and bundling.

Transpiling is the process of converting modern javascript code to a form that is understood by even older browsers. Babel takes care of this. Babel also has various presets which allow for transpiling different…

So this is going to be a super short primer for people who’re trying to write JOI extensions. I recently wrote an extension to validate mongodb object IDs and I’ll document the steps for the same here; Let’s get started

Joi uses something called as extension objects to “extend” its functionality.
These objects typically look something like this:

{ base: any_joi_base_function_you_want_to_use, name: 'the_name_of_your_validation', language: { // This is where you'd store error messages 'key_name': 'Error messages', }, pre(value, state, options) { you can parse the object value here or even add a base check and throw error }, rules: [{…

Not so long ago, I got myself into a “many-to-many associations” soup (Yes, me is noob 😓). Hence, I am composing this tutorial as a follow up to my previous post in order to help anybody avoid the certain common pitfalls.

But, before we begin:

Disclaimer: It is assumed that anybody reading this article works with nodeJS, sequelize and has a good understanding of how databases work.

To begin with, let me explain a (highly) simplified version of the issue I faced. Let us assume that we are to maintain, create and fetch records for a certain vehicles showroom. We…

Ever spent hours of your time trying to accumulate data from multiple tables and serve a combined response but only ended up with buggy code? So did I. Associations were my way out, I figured. As a novice, after spending hours trying to parse the incomprehensible sequelize docs, consulting a few seniors and tinkering my way around it, I decided that the internet finally needed a tutorial on associations in sequelize.

So if you’re looking for a comprehensive guide through the same or simply want to understand associations better, your search ends here. 😉

Disclaimer: This article assumes that the…