config-global.es6

/***************************
 * IONIC INTERNAL CONFIG 
 ***************************/ 
import {TabsConfig} from 'ionic/components/tabs';

function MaterialTabsMixin(tabsInstance) {
  Pannable(tabsInstance);
  return {
    onPanStart() {},
    onPan() {},
    onPanEnd() {}
  };
}

TabsConfig.platform('android')
  .mixin(MaterialTabsMixin)
  .set({ showStripe: true });

/***************************
 * DEVELOPER'S CONFIG 
 ***************************/ 
// When 'superAnimation' is set in config, use my mixin on tabs
TabsConfig.when('superAnimation').mixin(superAnimationMixin);

// Always show the material design stripe on large screens, no matter the platform.
TabsConfig.media('lg').set({ showStripe: true })

config-instance-declarative.html

<!-- plain config of instance -->
<ion-tabs [config]="{ showStripe: true }" />

<!-- Use the user-defined superAnimationMixin -->
<ion-tabs [config]="{ superAnimation: true }" />

<!-- Activate the user-defined superAnimation mixin on android -->
<ion-tabs [config-platform-android]="{ superAnimation: true }" />

<!-- show the stripe on these tabs on desktop -->
<ion-tabs [config-media-lg]="{ showStripe: true }" />

config-instance-imperative.es6

// This would imperatively activate the superAnimation mixin on android for this instance
myTabsInstance.$config.platform('android').set({
  superAnimation: true
});