This may sound lame, but server-side rendering. I initially didn't jump on the SPA (Single Page App) hype train because it felt wrong to hide content behind JavaScript, making SEO difficult. When I learned that React could actually spit out HTML on the server first, I got super excited to learn it. I'm super excited at how easy it is today too with Gatsby and Next.js.
This may sound lame, but server-side rendering. I initially didn't jump on the SPA (Single Page App) hype train because it felt wrong to hide content behind JavaScript, making SEO difficult. When I learned that React could actually spit out HTML on the server first, I got super excited to learn it. I'm super excited at how easy it is today too with Gatsby and Next.js.
I wrote about SSR on here actually.
The benefits and origins of Server Side Rendering
Sunny Singh ・ 5 min read