If the media attribute is omitted, the default for web browsers is "all", meaning that by default links apply to all media.
Before:
```ruby
> stylesheet_link_tag "style"
=> <link href="/assets/style.css" media="screen" rel="stylesheet" />
```
After:
```ruby
> stylesheet_link_tag "style"
=> <link href="/assets/style.css" rel="stylesheet" />
```
The current behavior is not going to change for existing applications.
For newly built applications, the media attribute is not going to be added by default. Which can be configured using the following:
```
Rails.application.config.action_view.stylesheet_media_default = false
```
Since there's already a whole seperate guide dedicated to Formhelpers,
there is no need to duplicate them in the ActionView Helpers guide.
We can link to the FormHelpers guide instead.
The `:include_blank` option of various `<select>`-related helpers causes
an `<option>` element with no content to be rendered. However, the
[HTML spec] says that unless an `<option>` element has a `label`
attribute (which must be non-empty), its content must be "Text that is
not inter-element whitespace."
In #24923, this issue was addressed for `select_tag` by adding a `label`
attribute to the `<option>`. This commit addresses the issue in the
same manner for `FormBuilder#select` and various date / time select
helpers.
[HTML spec]: https://html.spec.whatwg.org/multipage/form-elements.html#the-option-element
The ActionView Overview guide is currently a Work In Progress (WIP)
because, it seems, not all ActionView helpers are listed. As it's also
one of the largest guides, we can move the helpers to a seperate guide.
This allows us to remove the WIP status from the ActionView Overview
guide and reduce its size.
Ryuta Kamizono