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fix: align iOS 27 glass button and FAB pressed appearance #141

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Merged
rdlabo merged 3 commits into from
Sep 10, 2026
Merged

fix: align iOS 27 glass button and FAB pressed appearance #141

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83f2029
fix: align glass button and fab pressed appearance
rdlabo Sep 10, 2026
8d838d2
fix: preserve dark glass scaling and selector precedence
rdlabo Sep 10, 2026
56d1ebc
chore: update E2E screenshots
github-actions[bot] Sep 10, 2026
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Binary file modified demo/e2e/screenshot.spec.ts-snapshots/floating-action-button-fixed.png
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12 changes: 8 additions & 4 deletions src/styles/components/ion-button.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -6,11 +6,11 @@
*/

$scaleup-small: 1.12;
$scaleup-small-icon-only: 1.18;
$scaleup-small-icon-only: api.$button-scaleup-small-icon-only;
$scaleup-default: 1.25;
$scaleup-default-icon-only: 1.32;
$scaleup-default-icon-only: api.$button-scaleup-default-icon-only;
$scaleup-large: 1.12;
$scaleup-large-icon-only: 1.22;
$scaleup-large-icon-only: api.$button-scaleup-large-icon-only;

@mixin theme-buttons {
@include api.glass-background($shadow-opacity: 0.08);
Expand Down Expand Up @@ -343,7 +343,11 @@ $scaleup-large-icon-only: 1.22;
--color: rgba(var(--ion-color-base-rgb, var(--ion-text-color-rgb, 0, 0, 0)), 1);
}
&.ion-activated {
--opacity: 1; // for ion-back-button
&::part(native) {
@include api.glass-background-button-activated;
opacity: 1;
color: var(--color);
}
Comment on lines +346 to +350

@devin-ai-integration devin-ai-integration Bot Sep 10, 2026

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🟡 システム設定のダークモードで押下ボタンがライト配色になる

通常テーマの押下ルールはダーク側より詳細度が高く、新しい背景色、枠線、影を上書きさせません。system版とalways版では、押下ボタンがライト用ガラス配色になります。

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通常テーマのセレクターには .ios があり、クラス相当の詳細度がダーク側より1つ高くなります。そのため、後から読み込まれる ダーク用mixin の background-color、border、box-shadowでも、この追加ルールを上書きできません。.ion-palette-darkで囲むclass版は親クラスで詳細度が増えますが、system版とalways版にはその親がありません。

Example: ionic-theme-ios26.scss と ionic-theme-ios26-dark-system.scss を読み込み、OSをダーク設定にしてdefault fillのボタンを押します。ダーク側はselected色の56%背景を指定しますが、通常側のglass背景96%と通常側の輪郭・影が勝ちます。

Recommended fix: system版とalways版でもダーク側のセレクターが通常側以上の詳細度になるよう、theme-dark-buttonの対象に同じ.ios条件を追加してください。FABのように同一要素へ競合するプロパティについては、生成CSSの詳細度と読み込み順の両方を確認してください。

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--color: rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.1);
&.ion-color {
--color: rgba(var(--ion-color-base-rgb, var(--ion-text-color-rgb, 0, 0, 0)), 0.1);
Expand Down
13 changes: 6 additions & 7 deletions src/styles/components/ion-fab.scss
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Original file line number Diff line number Diff line change
@@ -1,8 +1,8 @@
@use '../utils/api';

$scaleup-small-icon-only: 1.18;
$scaleup-default-icon-only: 1.2;
$scaleup-large-icon-only: 1.12;
$scaleup-small-icon-only: api.$button-scaleup-small-icon-only;
$scaleup-default-icon-only: api.$button-scaleup-default-icon-only;
$scaleup-large-icon-only: api.$button-scaleup-large-icon-only;

ion-fab.ios:not(.ios26-disabled) {
--transform-value: 2.5px;
Expand All @@ -13,7 +13,7 @@ ion-fab.ios:not(.ios26-disabled) {
ion-fab-button {
--background: rgba(var(--ios26-glass-background-rgb), 0.72);
--box-shadow:
inset 0 0 8px 0 rgba(var(--ios26-glass-box-shadow-color-rgb), 0.2), 0 0 10px 0 rgba(var(--ios26-glass-box-shadow-color-rgb), 0.82);
inset 0 0 8px 0 rgba(var(--ios26-glass-box-shadow-color-rgb), 0.2), 0 0.5px 1px 0 rgba(var(--ios26-glass-box-shadow-color-rgb), 0.08);
--transition:
var(--ios26-activated-transition-duration) transform cubic-bezier(0.25, 1.11, 0.78, 1.59),
var(--ios26-activated-transition-duration) color ease;
Expand All @@ -38,6 +38,7 @@ ion-fab.ios:not(.ios26-disabled) {
&.ion-activated {
--color: rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.1);
&::part(native) {
@include api.glass-background-button-activated;
transform: scale($scaleup-default-icon-only) translateZ(0);
-webkit-transform: scale($scaleup-default-icon-only) translateZ(0);
}
Expand All @@ -59,10 +60,8 @@ ion-fab.ios:not(.ios26-disabled) {
}

&::part(native) {
@include api.glass-background($include-background: false, $include-box-shadow: false);
// The previous background shorthand reset Ionic's padding-box default.
// There is no CSS custom property for background-clip, so preserve it via the Part.
background-clip: border-box;
@include api.glass-background($include-background: false, $include-box-shadow: false);
}
}

Expand Down
12 changes: 9 additions & 3 deletions src/styles/utils/api.scss
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
$button-scaleup-small-icon-only: 1.18;
$button-scaleup-default-icon-only: 1.38;
$button-scaleup-large-icon-only: 1.22;

$_glass-surface: linear-gradient(
180deg,
rgba(var(--ion-text-color-rgb, 0, 0, 0), 0) 4%,
Expand Down Expand Up @@ -80,6 +84,9 @@ $_glass-surface: linear-gradient(
}

@mixin glass-background-button-activated {
background-color: rgba(var(--ios26-glass-background-rgb), 0.96);
border-color: rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.12) rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.32)
rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.16) rgba(var(--ion-text-color-rgb, 0, 0, 0), 0.28);
box-shadow:
inset 0 0 0 0.5px rgba(var(--ios26-glass-border-color-rgb), 0.95),
inset 0 1px 3px 0 rgba(var(--ios26-glass-border-color-rgb), 0.85),
Expand All @@ -96,6 +103,8 @@ $_glass-surface: linear-gradient(
) {
@if $include-background {
background: rgba(var(--ios26-button-color-selected-rgb), $opacity);
} @else {
background-color: rgba(var(--ios26-button-color-selected-rgb), $opacity);
}
backdrop-filter: blur($blur) saturate($saturate);
@if $include-box-shadow {
Expand All @@ -109,9 +118,6 @@ $_glass-surface: linear-gradient(
background-clip: border-box;
background-origin: padding-box;

// Hardware acceleration optimization for glass effects
transform: translateZ(0);
-webkit-transform: translateZ(0);
-webkit-backface-visibility: hidden;
backface-visibility: hidden;
}
Expand Down
6 changes: 3 additions & 3 deletions src/styles/utils/dark/ion-button.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@
--color: rgba(var(--ion-color-base-rgb, var(--ion-text-color-rgb, 0, 0, 0)), 1);
}
&::part(native) {
@include api.glass-background-button-activated-dark($include-background: false, $include-box-shadow: $is-back-button);
@include api.glass-background-button-activated-dark($include-background: false);
}
ion-icon {
color: rgb(255, 255, 255);
Expand All @@ -49,10 +49,10 @@
ion-buttons.ios:not(.ios26-disabled):not(:has(ion-back-button, ion-button:not(.button-clear))) {
@include theme-dark-buttons;
}
ion-button:not(.ios26-disabled) {
ion-button.ios:not(.ios26-disabled) {
@include theme-dark-button;
}
ion-back-button:not(.ios26-disabled) {
ion-back-button.ios:not(.ios26-disabled) {
@include theme-dark-button($is-back-button: true);
}
}
3 changes: 3 additions & 0 deletions src/styles/utils/dark/ion-fab.scss
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,9 @@
ion-fab.ios:not(.ios26-disabled) {
ion-fab-button {
&.ion-activated {
&::part(native) {
@include api.glass-background-button-activated-dark($include-background: false);
}
Comment on lines +7 to +9

@devin-ai-integration devin-ai-integration Bot Sep 10, 2026

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🟡 ダークモードで押下中のFABが拡大されない

ダークテーマでは、このmixinが後からtransform: translateZ(0)を出力し、通常テーマのscaleを上書きします。そのため、FABの押下時だけ拡大しません。

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glass-background-button-activated-dark は背景や枠線だけでなく、transform: translateZ(0) も生成します。このルールは通常テーマの 押下時scale と同じ要素、同じ詳細度に適用され、ダークテーマ側が後勝ちします。結果として背景は切り替わりますが、scale成分が失われます。

Example: 通常サイズのFABをダークモードで押すと、通常テーマが設定した scale(1.38) translateZ(0) は translateZ(0) に置換されます。ライトモードでは1.38倍に拡大しますが、ダークモードでは等倍のままです。

Recommended fix: ダーク用mixinからtransformを分離するか、FAB向け呼び出しではtransformを生成しないオプションを追加してください。あるいは、ダーク側でsmall/default/largeそれぞれのscaleを保持したtransformを再指定してください。

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--color: rgba(var(--ion-text-color-rgb, 0, 0, 0), 1);

&.ion-color {
Expand Down
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