I have this nagging problem of determining an end user’s country/region in my web apps. The reasons for doing that are many - Automatic conversion of an event date/time Display regional news Show prices in user’s currency .. and so on We could do two things to determine a user’s region -

We have looked at functions quite a bit on this blog over the last two years. We have seen many avatars of a function including a function object, a function’s method, function of functions, and so on. But, what we have not done is to document all the ways in which we can define functions.

ES2020 introduced nullish coalescing operator. We will see just how and where can you find use for it? What it is? Nullish coalescing operator (??) is introduced in the newest Javascript specification. It’s primary design goal is quite simple - provide a way to check for nulls to return true or false values from an expression.

Here’s a good guide to get you started on Javascript in a practical way. Why another guide? Practical - don’t learn for the sake of learning, learn for the sake of doing! Tactical - learn what matters, fast (yes, that’s what everyone says) Strategic - see the big picture This guide will get you started from the beginning, graduate you to using industry standard tools, and point you towards the right direction for learning even more than what can be offered in one guide or course.

Here’s a quick demo of how you can convert XML to JSON in NodeJS. Problem You are given a slew of XML files and you have to convert them to JSON. But why JSON? It takes lesser space Faster and easier to work with What are we dealing with here?

I have used AdonisJS in and out of projects in the last year. Despite it’s smaller community and not-so-regular enhancements, it remains one of my favourite NodeJS frameworks. I recommend AdonisJS for hobby and production projects in full confidence :) I typically use AdonisJS for back-end, which has me start with -

Fastode is an experimental boilerplate / framework based on Fastify. Why another boilerplate? Well, I just wanted to experiment with technologies to create MVP products. Although I have used NestJS, AdonisJS and friends before, those frameworks, while being great, bring their structure and overhead to any project. I wanted to check how difficult or easy it is to just start with a bunch of basic features and leave everything else to the project.

How can you use packages being developed locally in other projects - without publishing them to npm repository? NPM Packages Make Life Exciting NPM makes it really easy to create packages and reuse them across projects. I am not even talking about big, useful libraries like Vue, Loadash etc. - just the routine problems across our projects.

You can refer to other files/folders using a simple require or using basic node libraries. But, how can you do that with npm packages? The Problem When creating a bunch of Javascript files, here’s what you can do to refer other files - 1 const awe = require("../plugins/awesome.js"); This fetches awesome.

I had been meaning to use more of Fastify for work, but only made that a reality recently. So far I have had a great experience on the server framework. What is Fastify? Fastify is a low-overhead server framework built on top of NodeJS. Fastify was started in late 2016 and jumped to v1.

I was getting back to Svelte for a small project and ran into a strange issue. npm run dev did not run the svelte app as expected - no output or errors. First I create a new project. 1 2 3 4 npx degit sveltejs/template awesome-project-1 cd awesome-project-1 npm i npm run dev And, I get greeted with nothing.

Assert is a general-purpose validator and should not be used in the context of testing alone. An assert in Javascript simply checks for truthy values and produces an error otherwise. We use it quite a bit in automated testing when checking for correctness of output for pre-defined inputs. We use asserts like so -

Why use unknown when we have any in Typescript? Type inferences are powerful and allows us to do magic when we don’t know types. 1 2 3 const i: any = 1; console.log(i); // 1 unknown seems to do the same thing. 1 2 let x: unknown = 1; console.