[Tags] Apply a className to various elements based on the active tags

[tobyzerner]

From @tobscure on August 27, 2015 13:50

We should add a className to the body and each DiscussionListItem based on what tags are in use. Could be handy for doing some special tag-based styling.

What needs to be done:

• Extend IndexPage's config method to add a class (IndexPage--tag--{slug}) to the body based on the currently-active tag. Ensure that it is removed properly onunload.
• Extend DiscussionPage's config method to add classes (DiscussionPage--tag--{slug}) to the body based on the current discussion's tags. Ensure that they are removed properly onunload.
• Extract core's DiscussionListItem classes into a method that returns an object of class names, which is then applied to the root element using the classList util.
• Extend that new classNames method and add classes (DiscussionListItem--tag--{slug}) based on the discussion's tags.

Copied from original issue: flarum/tags#15

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[stale[bot]]

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[franzliedke]

I'm thinking one class tag--{slug} on the body should be enough, as it could be combined with several other classes for some of the other aspects mentioned.