The process to format a number as currency can be a tedious task. It feels like a small task, but the number of lines and the edge cases can keep on increasing when considering factors such as internationalization and different formatting standards. Luckily, ES2015 introduced an internationalization API which can...
EcmaScript 2015 introduced yet another feature that has not been used widely yet. A JavaScript proxy allows us to wrap an existing object with a layer. The layer can provide us with capabilities such as the interception of attributes and methods. And this can be done even if the properties...
I was recently working on a project in which I was trying to use a shorthand notation for destructuring assignment of a variable. I was researching different ways of getting a specific scenario to work. And while doing that research, I found that ES2015 had added 3 new object initialization...
JavaScript promises have been a huge catalyst for asynchronous coding in the language. They have vastly improved the performance and experience for web development. One shortcoming of native promises has been that we were not able to cancel an HTTP fetch request once it was initiated. But now there is...
When writing unit-tests for JavaScript modules, we often encounter a dilemma wherein the module has some private functions that have not been exported. Testing a function that has been exported is easy since it can be imported in the unit testing framework, and the functionality can be tested. But how...
The latest version of ECMAScript introduced three new logical assignment operators: nullish, AND, and OR operators. These are supported from Firefox 79 onwards, Chrome 85 onwards, and naturally there is no IE support but since Edge is now chromium based, it is available there too. They are not available in...
The groupBy method is one of the reasons people use lodash in their project. In this blog post, we will write our own version of groupBy using reduce and vanilla JavaScript. What groupBy does? groupBy works on an array of items, and it groups these items together into an object...
Promises have not been a new concept in the javascript community. They have existed in the ecosystem for a long time. JavaScript promises existed even before they were officially made a part of the ECMAScript spec in ES6. These initial implementations of JavaScript promise were in the form of framework...
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