Working on emoji-picker-react I encountered a challenge - filtering the list of 1800 emojis triggered a significant delay due to re-renders.Let's learn how I fixed this only using CSS!

In the talk I will explain the pains and problems of form validation Then I will explain the mental model of unit tests, and compare it to how we think about form validations.I will introduce vest with a bit of live coding showing its unit testing syntax.

Forms on the web have always been with us, yet it still feels like you always have to fight them to make validation work as you planned - and even with the significant improvements modern day libraries and frameworks give us, maintenance is mostly a hassle.Vest is a new breed of form validations framework. It draws its syntax and style from Unit Testing frameworks like mocha or Jest (hence the name), which brings the elegance and declarative nature of these frameworks to the world of form validation, greatly reducing the overhead it takes to write, maintain and reuse validations in your JS apps.