Issue number: resolves#24638, resolves#18592
---------
<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->
<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
Developers have requested that Ionic Framework support the dynamic type
feature on iOS for accessibility purposes. Ionic applications do not
respond to font scaling on iOS which can create inaccessible
applications particularly for users with low vision. Ionic apps on
Android devices currently support the Android equivalent due to
functionality in the Chromium webview.
Developers have also requested a way of adjusting the fonts in their
Ionic UI components consistently.
## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- Ionic components now use `rem` instead of `px` where appropriate. This
means devs can change the font size on `html` and the text in supported
Ionic components will scale up/down appropriately
- Add support for Dynamic Type on iOS (the iOS version of Dynamic Font
Scaling)
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->
## Other information
<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->
---------
Co-authored-by: Maria Hutt <thetaPC@users.noreply.github.com>
Co-authored-by: Brandy Carney <brandyscarney@users.noreply.github.com>
Co-authored-by: Shawn Taylor <shawn@ionic.io>
Co-authored-by: ionitron <hi@ionicframework.com>
Co-authored-by: Sean Perkins <sean@ionic.io>
Co-authored-by: Sean Perkins <13732623+sean-perkins@users.noreply.github.com>
Co-authored-by: Amanda Johnston <90629384+amandaejohnston@users.noreply.github.com>
Issue number: resolves#17676
---------
<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->
<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->
## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->
The IonNav, IonRouterOutlet, and .ion-page elements have `overflow:
hidden` which prevent content from spilling out of it. This was likely
done to prevent these elements from having overflow scroll (since the
inner IonContent should be scrollable). However, this breaks the
translucency effect on IonTabBar because the content in IonContent can
not scroll under the IonTabBar.
```html
<ion-tabs>
<ion-router-outlet> <!-- this has overflow: hidden -->
...
<ion-content fullscreen="true">...</ion-content>
</ion-router-outlet>
<ion-tab-bar translucent="true">...</ion-tab-bar>
</ion-tabs>
```
In Ionic v3 components such as IonTabs and IonNav did have `overflow:
hidden`:
cf35d5eb7f/src/components/app/app.scss (L241-L246)
However, components like IonNav were not used inside of tabs at the
time, so the reported bug was not a problem then.
## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->
- Removed `overflow: hidden` from IonNav, IonRouterOutlet, and
.ion-page. This change seems safe to make because the `position:
absolute` and top/right/bottom/left values should ensure that these
elements take up the available screen space and avoid having overflow
scrolling.
## Does this introduce a breaking change?
- [ ] Yes
- [x] No
<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->
## Other information
<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->
Dev build: `7.4.2-dev.11695832397.13fa6703`
Note: Fixing this reveals
https://github.com/ionic-team/ionic-framework/issues/21130 which is why
this fix is dependent on the linked issue getting fixed first.
---------
Co-authored-by: ionitron <hi@ionicframework.com>
this commit removes a globally injected style, `ionic.skip-warns.scss`,
from the project. this stylesheet was used to set a variable, `$Ionic`,
that would turn on/off deprecation warnings in (the also removed)
`ionic.deprecation.scss`. any file using either of the aforementioned
files have been updated.
this change is occurring while the stencil team is looking to improve
the size of generated components that use >1 mode. this deprecation was
a part of an initiative to remove sass source files from artifact
published to npm. while that was completed, this deprecation was not
removed (until now)
Co-authored-by: Liam DeBeasi <liamdebeasi@users.noreply.github.com>
resolves#17583
BREAKING CHANGE:
The `[hidden]` attribute has been removed from Ionic's global stylesheet. The `[hidden]` attribute can continue to be used, but developers will get the [native `hidden` implementation](https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/hidden) instead. The main difference is that the native implementation is easier to override using `display` than Ionic's implementation.
Developers can add the following CSS to their global stylesheet if they need the old behavior:
```css
[hidden] {
display: none !important;
}
```
BREAKING CHANGES
The responsive display classes found in the `display.css` file have had their media queries updated to better reflect how they should work. Instead of using the maximum value of that breakpoint (for `.ion-hide-{breakpoint}-down` classes) the maximum of the media query will be the minimum of that breakpoint.
fixes#18600
