WordPress no longer supports many old old browsers: https://make.wordpress.org/core/2017/04/23/target-browser-coverage/
This also removes alot of no longer necessary CSS. It served us well, but we are never getting back together with IE8,9,10.
So, in the (paraphrased) words of Taylor Swift:
I remember when we dropped support the first time
Saying, "This is it, I've had enough, " 'cause like
We hadn't seen many users in a month
When you said you needed flexbox. (What?)
Then you postMessage again and say
"IE8, I miss you and I swear I'm gonna change, trust me."
Remember how that lasted for a day?
I say, "I hate the box model, " we break up, you call me, "I love css-grids."
Ooh, we called it off again last night
But ooh, this time I'm telling you, I'm telling you
We are never ever ever supporting IE 8,9,10,
We are never ever ever supporting IE 8,9,10,
You go talk to EDGE, talk to my FIREFOX, talk to CHROME
But we are never ever ever ever getting back together
Like, ever...
Fixes#37651.
Props stunnedbeast, netweb, jorbin.
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Making behavior changes based on some broad definition of what mobile is rarely, if ever, makes sense. Each bit of functionality should be more clearly targeted, whether that's for screen size, performance, or some kind of touch capability.
props akibjorklund.
see #33704.
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When Open Sans was in use, the `300`, `400`, and `600` weights were loaded. `400` is the equivalent of `normal`; however, `bold` is equivalent to `700`, not `600`. With the move to system fonts, we need to be specific rather than relying on the lack of a `700` weight. Not all system fonts include a `600` weight; in those instances, they will use the `bold`/`700` weight.
The WordPress CSS Coding Standards have been updated accordingly.
props coderste.
see #36753.
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Rejoice, for your admins will feel more native to your surrounding computing environment and likely load faster, especially when offline, as they no longer have to talk to The Google Overlord.
At the time of introduction in 3.8, there were not good system fonts common to all platforms at the time. In the years since, Windows, Android, OS X, iOS, Firefox OS, and various flavors of Linux have all gotten their own (good) system UI fonts.
There will definitely be visual bugs, mainly around alignment and spacing; these should be documented and reported on the ticket and fixed more atomically so that our current and future selves have a better understanding of what happened and why.
The style remains registered, as it is almost certainly in use by themes and plugins.
props mattmiklic.
see #36753.
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These colored backgrounds can be accessed by adding the `.notice-alt` class to a notice.
There is also now a large version when using the `.notice-large` class, and a `.notice-title` class that is appropriate for headline text within a large notice.
props paulwilde, hugobaeta, melchoyce.
fixes#32244.
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There is now a base class of `notice`, with additional classes of `notice-success`, `notice-warning`, `notice-error`, and a new blue `notice-info`.
Also corrects some misleading notice colors, such as plugin tested up to warnings and login messages.
props avryl, melchoyce.
fixes#27418.
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The admin CSS was merged in #18314.
After a couple years as it stood,
The mess it had become just was no good.
One day we realized Grunt is pretty cool,
And said "we should use this as our build tool!"
Now we can maintain separate files with ease,
Using @import and cssmin meets all our needs.
Welcome to the future of the WordPress stylesheets,
And thanks to Slick Rick for the beats.
props jorbin for the initial patch.
fixes#26669.
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