Modernizr

[yramagicman]

Why doesn't WordPress bundle ​Modenrizr along with the rest of the scripts? It would make sense considering the number of people who use HTML5 and CSS3 in their themes.

[SergeyBiryukov]

Why doesn't WordPress bundle ​Modenrizr along with the rest of the scripts?

It has no use in core at the moment.

[nacin]

Indeed, we only bundle scripts that we need and use.

[yramagicman]

Ok, that makes sense. I guess I'll just have to keep adding it to my themes the "old fashion" way.

[ocean90]

#24568 was marked as a duplicate.

[Looimaster]

"It has no use in core at the moment."
"Indeed, we only bundle scripts that we need and use."

Do you use jquery-effects-blind, jquery-effects-bounce, jquery-effects-clip, jquery-effects-drop, jquery-effects-explode, [...10 more...], jquery-ui-selectable, jquery-ui-position, jquery-ui-accordion, prototype, scriptaculous-root etc. in core?

1) Number of people that would like to use jquery-ui-selectable in their themes or plugins: 1 out of 100.
2) Number of people that would like to use Modernizr in their themes or plugins: 10 out of 100.

I think that nowadays every other theme or plugin wants to detect touch devices and hide elements or change position: fixed; to position: absolute; for them. It makes a lot of sense to use Modernizr and not something like wp_is_mobile() (the biggest problem: it's PHP and doesn't allow JS nor CSS detection and such detection is needed right there). I would open a discussion for this library. It becomes more and more useful as more touch devices appear and browser market is differentiating.

[nacin]

We made a choice to specifically include all of jQuery UI, because we were already using a number of components, because the components and their dependencies are fluid, and because it was really confusing. Pieces of jQuery UI is different from an entirely different library from a different vendor.

Regarding Prototype and Scriptaculous: We also bundle scripts we used to use. But, we recently unbundled both of these and now point to Google's CDN.

[Looimaster]

I see and I'm very happy that full jQuery UI is there. It should stay there.

Well, I think that Modernizr should be used in WordPress core because it is as simple as this:

if ( Modernizr.touch ) {
  // do something like replace <video> with its poster image
}

or

.touch .element { display: none; }

And detecting user agents in wp_is_mobile() isn't reliable and not applicable to CSS. That's just my suggestion. jQuery is used by 95 out of 100 people and Modernizr would be used by perhaps 10/100 people.