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This applies to all 4.x versions of IPS. Occasionally you'll want to style a specific element on a specific page of your community - maybe you want to change how topic titles are shown inside a topic, or do something specific to the styles used in activity streams, without also altering other screens where the same elements are used. Your first instinct might be to open the template editor and add some custom classnames so you can style them. This would certainly work, but the downside is your template is now customized, so any future IPS4 updates would leave the template out of date. Not ideal by any means. Instead, you can use some helpful attributes that IPS4 adds to the body element, and then build a CSS selector around them. There's four attributes, and they always reference the current page the user is on: data-pageApp - The application key (e.g. core, forums, cms etc.) data-pageModule - The current module with the application (e.g. pages) data-pageController - The current controller within the module (e.g. topic, page etc.) data-pageLocation - Either admin or front. So let's say we want to change how the .ipsPageHeader element looks within topic view. Our selector would look like this: body[data-pageapp="forums"][data-pagemodule="forums"][data-pagecontroller="topic"] .ipsPageHeader { ...your styles } If you don't want to be that specific, you can just use the attributes you need. For example, if you want to change all .ipsPageHeader styles in the Forums app, you'd do: body[data-pageapp="forums"] .ipsPageHeader { ...your styles } Tip: If you don't know the correct app/module/controller for the page you're on, you can find out by visiting the page and then viewing the page source. You'll see these attributes in the body tag near the top. And as always, be sure you add your CSS to custom.css to keep your upgrades easy. https://invisioncommunity.com/4guides/themes-and-customizations/tips-tricks_362/targeting-elements-on-specific-pages-with-css-r179/

Super tutorials to keep under the elbow when as I am deeply modifying its site. Hyper useful for those who do not know the coded architecture nor the paths to find the famous lines of codes to modify. Thank you for your work, friends ?

To be even more specific, you can target categories or even forums themselves. For example: .cForumRow[data-categoryid="1"] Will only change stuff on the forum category with the ID 1. At the same time: .ipsDataItem[data-forumid="3"] Will only change stuff on the forum with the ID 3. With that in mind you can change the icon to be different for every subforum for example.