Skin:Vector/2022/Design documentation

Vector 2022 was initially designed and developed by the Readers Web Team, starting in 2020. This page aims to provide rationales behind the various design decisions of Vector 2022, with the intended purpose of helping future designers (and developers) of the skin make informed decisions in the future.

1. Why is the table of contents next to the article (vs. inline)?
  
 * Rationale: the table of contents is located next to the article so that you can see it immediately when you land on the page. The table of contents is a critical reading element, allowing people to understand the contents of the page, and easily navigate between different sections. Therefore it is important for it to be easily discovered at the top of the page. In Legacy Vector the table of contents is inline, below the lead section, which means that sometimes when you land on the page you can't see the table of contents at all without scrolling (depending on the length of the lead section and the width of your screen).


 * Tradeoffs:
 * Since the table of contents is now displayed in a more narrow space, long section titles wrap (making it more difficult to read them). There is also less room for indentations, which makes it more difficult to differentiate between the various levels of headings (more on this below).
 * Some people who have been using Wikipedia for a long time have observed that it feels weird to no longer have a gap or separation between the lead section and the rest of the article, which the table of contents previously provided.
 * Follow-up questions:
 * Can it be inline, and then once you’ve scrolled past the inline one, a sticky one appears somewhere? Did you try that?
 * This would mean it isn’t available immediately when you land on the page, which means it wouldn't meet the main design goal. Additionally, it's important to have the table of contents available throughout the entire page, so it can be accessed at any time. If it was inline, there would have to be a second version of it that appeared once you had scrolled past the inline would. This would add significant complexity to the website experience, because instead of just being in one place all the time, the position would change depending on where you were on the page.
 * We did try this approach during our initial testing: version 1, version 2, version 3

2. Why are sub-sections collapsed by default?
  
 * Rationale: sometimes, when an article has many sections and sub-sections, the table of contents is very tall, and you are unable to see the entirething without scrolling the page. Sub-sections are collapsed by default for articles with more than 28 sections total. This is done in order to make it so that (in most cases) you can see all top-level sections within the table of contents without scrolling. This allows you to quickly learn the contents of the entire page, at a high-level.