I’m currently a front-end developer, but I have experience in developing a Webkit-based browser. My main responsibility was to port the rendering engine to various operating systems in order to support HTML5 specification and various CSS features. Even though the abstraction layer of the rendering engine is the same, there…

Years have passed since ES2015 came out in June 2015. While writing the previous weekly picks, I thought, “Is there any ES2015 syntax I’m not using, like Proxy or Reflect? 🤔". The first things that came to mind were WeakMap and WeakSet. I became interested in weak references, so I…

🎊 TOAST UI Editor 3.0 is here! 🎊 With the release of TOAST UI Editor 2.0, we were able to improve a lot of features including the Editor’s markdown parsing accuracy, syntax highlighting feature, scroll sync accuracy, and more. All of these improvements were made possible due to the implementation of our own ToastMark markdown parser. However, because…

Mock data refers to artificial data created by developers for testing purposes. When are mock data most commonly used? When it is hard to pin down expected values in E2E testing environment due to the dynamic nature of the actual data When it is hard to assess different data representations…

I began to wonder why Reflect was used to implement the Vue 3 Reactivity's Proxy trap. Upon Googling, only thing I could find was how to use the Proxy's handlers or other tutorials, so I decided to take a deeper look into it. This article reviews the basic concepts of…

For any web applications that target the global stage, internationalization(i18n) is a must. Internationalization is often implemented through i18n libraries or through self-implemented code. This article is written with the front-end developers who are suffering from the manual “copy-and-paste” process in mind. Follow this guide and executing a single line…

Vue.js 3.0.0 alpha was released on January 2020, and nine months later, on September 2020, vue-next 3.0 was released officially with the code name "One Piece" (yes, the anime). …

🎊 TOAST UI Chart 4.0 is here! 🎊 TOAST UI Chart v3 was developed based on svg and raphael.js. We supported and were loved by a wide range of browsers from IE8 to more modern browsers. However, as time passed, raphael.js stopped updating, and we needed to find a new solution to continue building the Chart. …

Origin of Time Zones The Law and Time Zones Browser’s Time Zone Support and Its Limitations Time Zone Data and Its Problems Front End’s Solution Goodbye moment.js For Koreans, Summer Time is not a very familiar concept. For those who live in the effective ranges of Summer Time, there are…