Perfrunner - an automated testing tool to check your web site performance improvements against various conditions
A few months ago I worked on the performance improvements for one React-based web application. I tried different tricks to improve initial application loading and I was really annoyed with the way of testing my changes. I had to launch the application several times to get average results. I had to repeat all launches against at least two types of networks (4g and my current). And I must do all mentioned once again for cache and cashless scenarios. So, for the one single change, I must run at least 12 tests. This was not fun. I decided that I don't want to do this anymore and this is how the Perfrunner appeared.
React.JS is an awesome library that widely used all over the world. However, it also contains some pitfalls that might negatively impact your application. And here I want to discuss one of such pitfalls - inlined runtime chunk that might prevent you from correct using one of the most useful security header - Content-Security-Policy.
Hey ho! Perfrunner already in alpha now! 🥳
If you wondering what Perfrunner is - it's a simple automation tool to track the performance of the web application built on top of puppeteer. It tracks performance metrics, custom marks, amount of the resources, and much more. Feel free to try it with:
npx perfrunner drag13.io
The code is not very nice and development still in progress, but I am on the way, so new features will arrive soon.
Working with TypeScript is very comfortable. It provides Intellisense, type-checking, and makes the developer's life much easier. But, sometimes, when I am using external libraries, I got a problem. They don provide types or shipped types that are outdated. In this case, there is no other option but to define custom typings my own. Luckily, it's not that hard as you may expect.
Nowadays, security is important as never before. I’ve prepared a very short article about the Top-5 security headers in 2020 that will help your site keep your users in safety.
React.JS application, performance and -500 milliseconds at launch - the history of our optimizations in numbers
Simple performance optimizations and -500 milliseconds at launch for the create-react-app.
If you are interested in how to profile and (what is more important) understand the profiling results - here is the example of profiling Habr.com - most popular IT resource in CIS.
@angular/cli added support for creating your own library with angular components. Let's check what we are offered.
How to start new JS project from scratch with automated formatting, linting, testing and documentation
Keeping your code consistent and well-formatted not an easy task even when you work alone. But when you work with a team or with open source projects all start getting even harder. Everyone has their own code style, someone doesn’t run tests, and no one writes documentation. This article will help you to set up all these things and even more — automate this routine to never do it manually.
Hi guys! Today we will learn how to setup Continuous Integration process for the C# project hosted on GitHub. This is very easy, can really improve your code quality and you always be sure that no one destroys your code with latest commit. Are you interested? Let’s give it a try!