[Userscript] Steam Wishlist Sorting Helper (edit ranking for a filtered wishlist)

Why?

Steam's 2018 wishlist redesign (moving the WL feature from Community to Store, so customers in China—who cannot access the Community but can access the Store—get to enjoy the feature) made it impossibru to change anything about the order of items on your wishlist once any form of filtering is applied, whether that's a name search or merely reducing it from all items view to games-only.
For people with humongous wishlists, this made it effectively impossible to retain their most-desired unpossessions at the top of the WL in a meticulously ranked fashion. If your list ain't sorted, your friends don't even know what to gift you for your birthday, name day, cake day, and similar.

This script forces the rank box and sorting handle to always be visible and active. My own use case is filtering games by name and typing new near-top positions for them into the box.

Install

Assuming you peruse a user script manager of any shape – https://greasyfork.org/en/help/installing-user-scripts has a list, but Edge users too should really use Chrome Store addons, like Tampermonkey – you just 👉🏻 CLICK HERE TO INSTALL👈🏻.

Usage details

Type a number in the ranking box and unfocus the box (or press enter) to submit a full re-ordered wishlist every time.
The script shows rankings on others' WLs, but you obviously cannot modify them.

If you have the wishlist sorted by anything else than Your Ranked Order and make any changes (Name / Price / Discount % / Date Added / Top Selling / Release Date / Review Score), this sorting will become permanent as the new Your Ranked Order.

Credits, prior art, funny bugs, side effects, and lazy design; also alternatives

I pretty much stole the entire thing from https://www.reddit.com/r/Steam/comments/7xwd5e/quickfix_i_have_hundreds_of_games_in_my_wishlist/ , so full credit goes to u/pope7 on Reddit.

The new wishlist will internally allow multiple games to share the same rank. The game first added to spot 1 is followed by the second game added to spot 1, and so on, is followed by the first game on spot 2, and so on.
(When you drag anything with the slider or enter a new number on the page, a correctly re-sorted list is sent, so this is typically a temporary state.)
You can pretty easy manually submit a new rank for specific app IDs. The first app ID you supply is spot 1, the second is spot 2, and so on. Meaning if you have a normally sorted list, and push three new games to the top, they will get positions 2, 4, and 6.

You can use the following in a browser console on a Steam Store tab, editing only the app IDs as needed:

fetch("https://store.steampowered.com/wishlist/profiles/0/reorder/", {
  "headers": {
    "content-type": "application/x-www-form-urlencoded; charset=UTF-8"
  },
  "body": `appids%5B%5D=1194520&appids%5B%5D=42670&sessionid=${g_sessionID}`,
  "method": "POST",
});

The profile ID can be set to zero, and each app ID needs to be preceded by a appids%5B%5D=, with a standard & between arguments. The session ID is taken from the page variables and works as-is.
The games you're pushing up have to already be wishlisted.
Remember if you do it multiple times in a row, your first batch gets actual-positions #2, #4, #6, your second batch will get positions #3, #6, #9, etc.

So… you just stole some code and wrote a ten option poll?

Yep.