x/pkgsite: is too restrictive on what constitutes a wide screen

[89z]

It seems pkg.go.dev looks at your current window width, and decides if you should see the "normal" version or "mobile" version, were the sidebar is removed. From my testing, the sidebar is not shown, unless the body width is at least 1263 pixels. That seems too high to me. On a normal day, my browser width is about 1188 pixels, and I use a variety of websites with no problem. I dont think I should have to increase my width just for Go package site.

Before the move from golang.org, I never had to do anything like that. Its only now with the new pkg.go.dev, and must be a recent change as well. Example page:

https://pkg.go.dev/image

[89z]

Workaround:

/* ==userstyle==
@version 1.0.0
@namespace Steven Penny
@name go.dev
==/userstyle== */
@-moz-document domain("go.dev") {
   .go-Main-navDesktop {
      display: block;
   }
   .go-Main-navMobile {
      display: none;
   }
   .go-Main {
      grid-template-areas: 'header header' 'aside aside' 'nav article';
      grid-template-columns: 25% 75%;
   }
}

[jamalc]

/cc @jinhongy, we've adjusted the breakpoints on pkg.go.dev in response to feedback in #45073, #44365, #44172, #42487, and #4055. There might be room for adjustments.

Here are the numbers on pkg.go.dev visitor browser width for the previous month.

Screens >= 960px	Screens >= 1280px	Screens >=1520px	Screens >= 1792px
88.32%	87.20%	66.70%	53.28%

and page layouts at the current breakpoints.

< 1280px	1280px - 1791px	>= 1792px
1 column	2 column	3 column