Whoever came up with the idea of toggling a website to a different color scheme deserves a medal. Adding that at the operating system level is :chefkiss:
Jump to heading I kind of don't think they should...
Here's my thinking. It is a control. It is something that I, the user, should have control over. I don't want every site to be darkmode by default.
Jump to heading Bootstrap's current site
Recently Bootstrap released a new version of their site that included a system for sanely toggling components between light and dark versions.
<nav class="navbar" data-bs-theme="dark">Again, :chefkiss:. I think that they implemented it perfectly. It is implemented perfectly on their site, it saves it to local storage so next time the page loads it is already set to the last mode you were on.
But it defaults to the OS setting.
Jump to heading Colors matter
Bootstrap is great for it's insanely reasonable theme, even if websites can have a certain smell because of it.
With the data-bs-theme setting though, [this means that the colors change depending on the theme] (https://getbootstrap.com/docs/5.3/customize/color/) and that's a foot gun.
Jump to heading This is a gripe
That's all it is.