I am a frontend engineer at LINE. I've moved from Fukuoka to Tokyo in 2016.
As a frontend engineer, I feel I still need to know more about the structure of JavaScript and web browsers, in order to provide quality UX to our users. Thankfully, we are given an access to peak through JavaScript's thoughts, thanks to Google and Mozilla for making their engine code available to public, along with nicely prepared documentation. The availability of various means for tracing and profiling code surely helps too. I'd like to take this opportunity to take you through hidden class,