Because it’s simple There is a nice article on how to use mouse drag with rxjs. With the modern javascript frameworks and libraries, we got to the point where is hard to do simple things. We don’t need rxjs, all we need is vanilla js. Svelte is just a cherry…

or how to compare dates in Javascript I stumbled upon the blog post named You Cannot Compare Dates In Javascript. The title is a bit misleading and it doesn’t give a reason, why we can’t compare them. …

My previous story on this topic was: How to bypass “slider CAPTCHA” with JS and Puppeteer In this story, I will go further to solve slider captcha with a different technique. This technique will solve the slider captcha faster and more efficiently. My focus will be on GeeTest slider captcha…

Don’t just blindly change your User-Agent header. When scraping, we want to do a few things. Scrape slowly (but fast enough), use proxy, rotate ip address and rotate User-Agent header. With this, we may go unnoticed. User-Agent header is one of the most abused headers by those who are scraping…

Next story on same topic - How to solve GeeTest “slider CAPTCHA” with JS Spam is a huge problem for website owners. On the other hand, CAPTCHAs drives me crazy and they are bad for user experience. CAPTCHA sucks. Let’s face it. There are a lot of ways to verify…

Parallax technique is not new. Few years ago parallax could end up implemented wrong, with jank. Now it’s 2019, browsers are great enough. There are plenty of examples in the wild. There are also lots of libraries. Parallax technique can be done with only CSS or with CSS+JS. Here, I…

There are so many posts about lazy loading images, I will bring nothing new to the table. But if you haven’t considered lazy loading yet, here are 3 quick and easy techniques to make web pages faster. Why I understand that there are websites that will have lots of images by…

You searched how to tree shake with Parcel and didn’t find it. It’s quick and easy. Every ones in a while we start some project and we start importing libraries. Project start to grow more and more and then we take a look how big our bundle is, and it’s…

You know that something is wrong when your tests are slow, unstable and ignored. Did I mention unmaintainable and hard to write? And finally how easy/hard is to setup your testing environment? Writing tests is usually painful and boring task, but I knew we can do it better. So lets…