fix(tab-tab): iOS translucent tab bar

core/src/components.d.ts

@@ -6359,6 +6359,7 @@ declare namespace LocalJSX {
           * The mode determines which platform styles to use.
          */
         "mode"?: "ios" | "md";
+        "onIonStyle"?: (event: CustomEvent<StyleEventDetail>) => void;
         "onIonTabBarChanged"?: (event: CustomEvent<TabBarChangedEventDetail>) => void;
         /**
           * The selected tab component

core/src/components/fab/fab.scss

@@ -44,7 +44,7 @@
 
 
 :host(.fab-vertical-bottom) {
-  bottom: $fab-content-margin;
+  bottom: var(--tab-translucent-safe-area, $fab-content-margin);
 }
 
 :host(.fab-vertical-bottom.fab-edge) {

core/src/components/footer/footer.scss

@@ -15,5 +15,5 @@ ion-footer {
 }
 
 ion-footer ion-toolbar:last-of-type {
-  padding-bottom: var(--ion-safe-area-bottom, 0);
-}
+  padding-bottom: calc(var(--ion-safe-area-bottom, 0) + var(--tab-translucent-safe-area, 0));
+}

core/src/components/tab-bar/tab-bar.tsx

@@ -1,7 +1,7 @@
 import { Component, ComponentInterface, Element, Event, EventEmitter, Host, Prop, State, Watch, h } from '@stencil/core';
 
 import { getIonMode } from '../../global/ionic-global';
-import { Color, TabBarChangedEventDetail } from '../../interface';
+import { Color, StyleEventDetail, TabBarChangedEventDetail } from '../../interface';
 import { createColorClasses } from '../../utils/theme';
 
 /**
@@ -30,6 +30,8 @@ export class TabBar implements ComponentInterface {
    */
   @Prop({ reflect: true }) color?: Color;
 
+  @Event() ionStyle!: EventEmitter<StyleEventDetail>;
+
   /**
    * The selected tab component
    */
@@ -50,11 +52,28 @@ export class TabBar implements ComponentInterface {
    */
   @Prop() translucent = false;
 
+  @Watch('translucent')
+  translucentChanged() {
+    // Find all tabs
+    const tabs = Array.from(this.el.closest('ion-tabs')?.querySelectorAll('ion-tab') ?? []);
+    for (const tab of tabs) {
+      if (this.translucent) {
+        tab.classList.add('tab-bar-translucent');
+      } else {
+        tab.classList.remove('tab-bar-translucent');
+      }
+    }
+    this.ionStyle.emit({
+      'tab-bar-translucent': this.translucent
+    })
+  }
+
   /** @internal */
   @Event() ionTabBarChanged!: EventEmitter<TabBarChangedEventDetail>;
 
   componentWillLoad() {
     this.selectedTabChanged();
+    this.translucentChanged();
   }
 
   connectedCallback() {

core/src/components/tab/tab.scss

@@ -2,3 +2,9 @@
   /* stylelint-disable-next-line declaration-no-important */
   display: none !important;
 }
+
+
+:host(.tab-bar-translucent) ::slotted(ion-content) {
+  /* stylelint-disable-next-line declaration-no-important */
+  --padding-bottom: 50px !important;
+}

core/src/components/tabs/tabs.ios.scss

@@ -0,0 +1,11 @@
+@import './tabs';
+
+:host(.tab-bar-translucent) {
+  --tab-translucent-safe-area: 60px;
+}
+
+slot[name='bottom']::slotted([translucent]) {
+  position: absolute;
+  bottom: 0;
+  width: 100%;
+}

core/src/components/tabs/tabs.md.scss

@@ -0,0 +1 @@
+@import './tabs';

core/src/components/tabs/tabs.tsx

@@ -9,7 +9,10 @@ import { NavOutlet, RouteID, RouteWrite, TabButtonClickEventDetail } from '../..
  */
 @Component({
   tag: 'ion-tabs',
-  styleUrl: 'tabs.scss',
+  styleUrls: {
+    ios: 'tabs.ios.scss',
+    md: 'tabs.md.scss'
+  },
   shadow: true
 })
 export class Tabs implements NavOutlet {
@@ -21,6 +24,8 @@ export class Tabs implements NavOutlet {
 
   @State() selectedTab?: HTMLIonTabElement;
 
+  @State() private tabCustomClasses: { [key: string]: boolean } = {};
+
   /** @internal */
   @Prop({ mutable: true }) useRouter = false;
 
@@ -182,10 +187,21 @@ export class Tabs implements NavOutlet {
     }
   }
 
+  private onIonStyle = (ev: any) => {
+    if (ev.target.tagName === 'ION-TAB-BAR') {
+      for (const key of Object.keys(ev.detail)) {
+        this.tabCustomClasses[key] = ev.detail[key];
+      }
+      this.tabCustomClasses = {...this.tabCustomClasses};
+    }
+  }
+
   render() {
     return (
       <Host
         onIonTabButtonClick={this.onTabClicked}
+        onIonStyle={this.onIonStyle}
+        class={this.tabCustomClasses}
       >
         <slot name="top"></slot>
         <div class="tabs-inner">

core/src/components/tabs/test/translucent/index.html

@@ -0,0 +1,204 @@
+<!DOCTYPE html>
+<html lang="en" dir="ltr">
+
+<head>
+  <meta charset="UTF-8">
+  <title>Tab - Translucent</title>
+  <meta name="viewport"
+    content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
+  <link href="../../../../../css/ionic.bundle.css" rel="stylesheet">
+  <link href="../../../../../scripts/testing/styles.css" rel="stylesheet">
+  <script src="../../../../../scripts/testing/scripts.js"></script>
+  <script nomodule src="../../../../../dist/ionic/ionic.js"></script>
+  <script type="module" src="../../../../../dist/ionic/ionic.esm.js"></script>
+  <style>
+    .scrollable-area {
+      height: 1400px;
+      background: red;
+      color: white;
+    }
+
+    .images {
+      display: grid;
+      gap: 4px;
+      grid-template-columns: 1fr 1fr;
+    }
+
+    .images img {
+      height: 100%;
+    }
+  </style>
+</head>
+
+<body>
+
+  <ion-app>
+    <ion-tabs>
+
+      <ion-tab tab="tab-one">
+        <ion-header>
+          <ion-toolbar>
+            <ion-title>Tab One</ion-title>
+          </ion-toolbar>
+        </ion-header>
+        <ion-content class="ion-padding">
+          <h1>Tab One</h1>
+
+          <div class="images">
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+          </div>
+
+          <div style="text-align: center;padding: 8px 0;">This is the end of the content</div>
+
+          <ion-fab slot="fixed" horizontal="end" vertical="bottom">
+            <ion-fab-button class="custom-white">
+              <ion-icon name="add"></ion-icon>
+            </ion-fab-button>
+          </ion-fab>
+        </ion-content>
+      </ion-tab>
+
+      <ion-tab tab="schedule">
+        <ion-header>
+          <ion-toolbar>
+            <ion-title>Tab Two</ion-title>
+          </ion-toolbar>
+        </ion-header>
+        <ion-content class="ion-padding">
+          <h1>Tab Two</h1>
+
+          <div class="images">
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+            <img src="https://cdn.pixabay.com/photo/2018/01/14/23/12/nature-3082832__480.jpg" />
+            <img src="https://images.pexels.com/photos/844297/pexels-photo-844297.jpeg" />
+            <img src="https://images.unsplash.com/photo-1607791330831-d3dcf312e2d1" />
+            <img src="https://images.template.net/wp-content/uploads/2016/04/25103502/HD-Featured-Image.jpg" />
+            <img src="https://wallpaper.dog/large/20435883.jpg" />
+          </div>
+        </ion-content>
+        <ion-footer>
+          <ion-toolbar>
+            <ion-title>Tab Two Footer</ion-title>
+          </ion-toolbar>
+        </ion-footer>
+      </ion-tab>
+
+      <ion-tab tab="tab-three">
+        <ion-header>
+          <ion-toolbar>
+            <ion-title>Tab Three</ion-title>
+          </ion-toolbar>
+        </ion-header>
+        <ion-content class="ion-padding">
+          <h1>Tab Three</h1>
+        </ion-content>
+      </ion-tab>
+
+
+      <ion-tab tab="tab-four">
+        <ion-header>
+          <ion-toolbar>
+            <ion-title>Tab Three</ion-title>
+          </ion-toolbar>
+        </ion-header>
+        <ion-content class="ion-padding">
+          <h1>Tab Three</h1>
+        </ion-content>
+      </ion-tab>
+
+      <ion-tab-bar slot="bottom" translucent="true">
+        <ion-tab-button href="" tab="tab-one">
+          <ion-label>Tab One</ion-label>
+          <ion-icon name="star"></ion-icon>
+        </ion-tab-button>
+
+        <ion-tab-button tab="schedule">
+          <ion-label>Tab Two</ion-label>
+          <ion-icon name="globe"></ion-icon>
+          <ion-badge color="danger">6</ion-badge>
+        </ion-tab-button>
+
+        <ion-tab-button tab="tab-three">
+          <ion-label>Tab Three</ion-label>
+          <ion-icon name="logo-facebook"></ion-icon>
+          <ion-badge color="primary">6</ion-badge>
+        </ion-tab-button>
+
+        <ion-tab-button tab="tab-four" class="e2eTabFourButton">
+          <ion-label>Tab Four</ion-label>
+          <ion-icon name="chatbox"></ion-icon>
+        </ion-tab-button>
+
+      </ion-tab-bar>
+    </ion-tabs>
+  </ion-app>
+
+  <style>
+    .custom-white {
+      --background: white;
+      --background-hover: #888;
+      --background-focused: #444;
+
+      --color: #3880ff;
+    }
+
+    .ios .custom-white {
+      --background-activated: #ddd;
+    }
+  </style>
+</body>
+
+</html>