Imagine when we remember a moment from a YouTube video but forgot at what time it occurs. What if we could search any keywords from any YouTube video through its closed captions text?

$refs is one of the tricky features to use in Vue.js. To use it, we have to do it at the right time and the right place. Even if we already did, sometimes the value is still undefined.

Learning CSS Flexbox has never been so interactive, every detail of Flexbox properties can be played with full flexibility. Learn for yourself and find the answers yourself.

In the previous part, we have created our own reactivity system. But it still lacks a feature, it can only do one task at a time. Now come to the second part to solve that problem.

Have you ever wondered how Vue.js create some variables become reactive? Writing in an input form and see the result instantly. What is the secret of that reactivity system? Let's deep dive into it together.