Almost all popular programming languages support regular expressions, and there’s a good reason for that: regular expressions provide developers with remarkably powerful tools that enable them to quickly perform tasks that would otherwise require dozens of lines of code. In this article, we will look at six text processing and manipulation tasks that front-end developers often have to deal with and see how regular expressions simplify the process.
In my recent post “How to make HTTP requests like a pro,” I discussed the benefits of using the Axios library. Nevertheless, it’s important to acknowledge that Axios is not always an ideal solution, and there are sometimes better options for making HTTP requests. Without question, some developers prefer Axios over built-in APIs for its ease of use. But many overestimate the need for such a library. The fetch() API is perfectly capable of reproducing the key features of Axios, and it has the added advantage of being readily available in all modern browsers.
ECMAScript 2019 (or ES2019 for short) introduces exciting new features such as Object.fromEntries(), flat(), flatMap(), trimStart(), trimEnd(), description property for symbol objects, optional catch binding, and more. The good news is that these features have already been implemented in the latest versions of Firefox and Chrome, and they can also be transpiled so that older browsers are able to process them. In this post, we will take a good look at these features and see how they upgrade the language.
The ninth edition of the ECMAScript standard, officially known as ECMAScript 2018 (or ES2018 for short), was released in June 2018. Starting with ES2016, new versions of ECMAScript specifications are released yearly rather than every several years and add fewer features than major editions used to. The newest edition of the standard continues the yearly release cycle by adding four new RegExp features, rest/spread properties, asynchronous iteration, and Promise.prototype.finally. Let's have a good look at each of these new features.