The asyncData hook. This hook can only be placed on page components. →這就造成header的觸發寫在各個page component裡面，而不寫在header component裡
Middleware lets you define custom functions that can be run before rendering either a page or a group of pages (layout).
https://nuxtjs.org/docs/2.x/directory-structure/middleware
無關小知識：位元運算
1. a>>n 表示a除以2的n次方
2. a>>n 表示a乘以2的n次方
3. 3.122132 | 0 結果是3，這個的邏輯沒有懂 https://hackmd.io/@Yu040419/rkE0bTsaE
https://blog.gslin.org/archives/2015/08/20/5936/%E9%97%9C%E6%96%BC%E5%90%84%E5%AE%B6-cdn-%E7%9A%84%E9%81%B8%E6%93%87/
Bot Manager service:
https://www.akamai.com/us/en/products/security/bot-manager.jsp
網站使用體驗核心指標一篇看懂，從概念介紹到如何優化完全解析-奇寶網路部落格 (seoseo.com.tw)
https://github.com/GoogleChrome/web-vitals
https://www.ithome.com.tw/news/137434
https://medium.com/hybrid-maker/%E7%B0%A1%E5%96%AE%E4%BE%86%E5%81%9A%E4%B8%80%E5%80%8B-chrome-extension-2359e43f282a
// 下面這個還沒看，稍微有覺得比起學習怎麼寫code，已經有點需要整體的運作，從發展到實踐成功，多看看別人的經歷不錯
https://tw.alphacamp.co/blog/how-to-make-a-chrome-extension
https://sci-hub.se/
