There is no Scrollbar for Sidebar on official reactjs website.

Hello everyone,
Today I visited React website to learn React by reading docs. But soon I realized that sidebar on react docs page https://reactjs.org/docs/getting-started.html doesn't have a scrollbar. I could not access contents of FAQ from sidebar because sidebar didn't have a scrollbar to scroll and see content of FAQ.

This is how web page looks on my laptop :-

As you can see that I clicked on FAQ in sidebar its content didn't appear because it get's outside of my screen height and I didn't have a scroll bar to scroll.
The one scrollbar that you can see on screen only scrolls content of side page and not scrollbar.

首先重現 https://reactjs.org/docs/getting-started.html 中側邊欄的行為，並檢查 issue 中所示的筆記型電腦大小 viewport 中的側邊欄。完成的標準是可以存取並獨立於文件主要內容捲動整個側邊欄，包括 FAQ。