2020-01-17 Master the Typescript in this 2020 year(day11) I started to use Typescript in my work last year. I could use Typescript. But I haven't understood that much, especially about Gradual Typing. So, I started studying typescript. using following the book. 実践TypeScript ~ BFFとNext.js&Nuxt.jsの型定義~作者:吉井 健文出版社/メーカー: マイナビ出版発売日: 2019/06/26メディア: 単行本(ソフトカバー)