author: Krasimir Tsonev

Krasimir is a blogger, who writes and speaks.
He loves open source and codes awesome stuff.


Build your own interactive JavaScript playground

posted in JavaScript on 2018-11-13

Recently I spent some time working on my own JavaScript playground called Demoit. Something like CodeSandbox, JSBin or Codepen. I already blogged about why I did it but decided to write down some implementation details. Everything happens at runtime in the browser so it is pretty interesting project.

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My new and shiny tool for live demos - Demoit

posted in JavaScript on 2018-11-05

I had some time during the weekend and decided to work on my slides for an event at the end of the month. I reached the part where I have to do a live coding session and I was wondering what tool to use. At the end I created my own called Demoit. This is a short article explaining how it works.

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React hooks: changing the mindset

posted in JavaScript on 2018-10-31

If you use React you probably know about the so called hooks. They were officially announced at this year's ReactConf by Sophie Alpert and Dan Abramov. Their presentation could be seen here. I, same as many others got intrigued by this new feature. A little bit confused by if I like them or not but kind of excited. This article pretty much sums up my thinkings around React hooks and aims to give a balanced opinion.

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NADCAST.18 with Sara Vieira

posted in NADCAST on 2018-10-04

This episode is with Sara Vieira. She is doing a lot of interesting things with React, GraphQL, Apollo and with JavaScript in general. She's also part of bunch of conferences doing talks and workshops which itself is a big challenge. Happy listening :)

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Pixo - Image editor for your web app

posted in JavaScript on 2018-09-03

If your users deal with images (photos, product images, etc.) it will be great if they have the ability to apply some basic editing after upload, e.g. adjust brightness and contrast for sharper view, crop, add some text, etc. However, if image editing is not the primary feature of your product, the profit from investment in such secondary feature won't cover the costs. Integrating a 3rd party image editor appears to be a wiser choice.

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NADCAST.17 с Радо Станков

posted in NADCAST on 2018-07-26

След дългата, почти два месеца пауза, епизод 17 на NADCAST е с Радо Станков. Започнахме с някои много интересни новини като предстоящия NotAHackathon и VarnaConf. След това си поговорихме за различните по вид работни среди. През freelancer-ството до работата в продуктова компания.

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A story about React, Redux and server-side rendering

posted in JavaScript on 2018-06-29

Long long time ago in a kingdom far far away there was an app. The app was supported by the well known React and Redux families but there was a problem. It was damn slow. People started complaining and the app had to do something. It had to deliver its content quickly so it provides better user experience. Then the server-side rendering was born.

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NADCAST.16 с Владимир Конушлиев

posted in NADCAST on 2018-05-31

Много ценен разговор с Владо се получи. В този 16-ти епизод дискутираме code review процеси, навици, мотивация и като за финал малко за баланса в нашата професия. Надявам се да ви хареса.

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React and separation of concerns

posted in JavaScript on 2018-05-27

Years ago when Facebook announced their JSX syntax we had a wave of comments how this was against some of the well established good practices. The main point of most people was that it violates the separation of concerns. They said that React and its JSX are mixing HTML, CSS and JavaScript which were suppose to be separated.

In this article we will see how React and its ecosystem has quite good separation of concerns. We will prove that markup, styles and logic may live in the same JavaScript land and still be separated.

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NADCAST.15 live recorded at React.NotAConf

posted in NADCAST on 2018-05-09

Episode #15 of NADCAST was live recorded at ReactNotAConf conference in Sofia on 28th of April. After every presentation we've made a panel with the speaker and ask topic related questions. So, if you listen the whole episode you'll get a pretty good overview of what the conference was about.

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