react-native-collapsible-tab-view

react-native-collapsible-tab-view

• Expo app
• Demo
• Features
• Installation
• Quick Start
• API reference
  • CollapsibleTabView
  • useCollapsibleScene
  • createMaterialCollapsibleTopTabNavigator
• Contributing

Expo app

A simple wrapper for react-native-tab-view that helps to build a collapsible tab view.

• View it with Expo.
• Checkout the examples for the source code of the Expo app.

Demo

Features

From react-native-tab-view

• Smooth animations and gestures
• Scrollable tabs
• Supports both top and bottom tab bars
• Follows Material Design spec
• Highly customizable
• Fully typed with TypeScript

From this package

• Integration with react-navigation - optional
• Collapsible Tabs

Installation

Open a Terminal in the project root and run:

yarn add react-native-collapsible-tab-view

Now add react-native-tab-view and all it's peer dependencies:

yarn add react-native-tab-view

For the peer dependencies, if using expo:

expo install react-native-gesture-handler react-native-reanimated

If not using expo, follow these instructions.

React Navigation Integration - Optional

If you want to integrate with react-navigation:

yarn add @react-navigation/native @react-navigation/material-top-tabs

Quick Start

import * as React from 'react';
import { StyleSheet, View, Text, Animated } from 'react-native';
import {
  CollapsibleTabView,
  useCollapsibleScene,
} from 'react-native-collapsible-tab-view';
import { SceneMap } from 'react-native-tab-view';

type Route = {
  key: string;
  title: string;
};

const SomeRoute: React.FC<{ routeKey: string; color: string }> = ({
  routeKey,
  color,
}) => {
  const scrollPropsAndRef = useCollapsibleScene(routeKey);

  return (
    <Animated.ScrollView
      style={{ backgroundColor: color }}
      {...scrollPropsAndRef}
    >
      <View style={styles.content} />
    </Animated.ScrollView>
  );
};

const FirstScene = () => <SomeRoute routeKey="first" color="white" />;
const SecondScene = () => <SomeRoute routeKey="second" color="black" />;

const HEADER_HEIGHT = 250;

const renderHeader = () => (
  <View style={styles.header}>
    <Text style={styles.headerText}>COLLAPSIBLE</Text>
  </View>
);

const renderScene = SceneMap({
  first: FirstScene,
  second: SecondScene,
});

const App: React.FC<object> = () => {
  const [index, setIndex] = React.useState(0);
  const [routes] = React.useState<Route[]>([
    { key: 'first', title: 'First' },
    { key: 'second', title: 'Second' },
  ]);

  const handleIndexChange = (index: number) => {
    setIndex(index);
  };

  return (
    <CollapsibleTabView<Route>
      navigationState={{ index, routes }}
      renderScene={renderScene}
      onIndexChange={handleIndexChange}
      renderHeader={renderHeader} // optional
      headerHeight={HEADER_HEIGHT} // optional, will be computed.
    />
  );
};

export default App;

const styles = StyleSheet.create({
  header: {
    height: HEADER_HEIGHT,
    backgroundColor: '#2196f3',
    justifyContent: 'center',
    alignItems: 'center',
    elevation: 4,
  },
  headerText: {
    color: 'white',
    fontSize: 24,
  },
  content: {
    height: 1500,
  },
});

API reference

The package has 3 main exports:

export	description
CollapsibleTabView	Component which is the one you'd use to render the collapsible tab view.
useCollapsibleScene	Hook which you use to get props and ref for ScrollView or FlatList.
createMaterialCollapsibleTopTabNavigator	Function to create the Navigator, if you are integrating with react-navigation

CollapsibleTabView

Simple wrapper of the original TabView.

Basic usage looks like this:

<CollapsibleTabView
  navigationState={{ index, routes }}
  onIndexChange={setIndex}
  renderScene={SceneMap({
    first: FirstRoute,
    second: SecondRoute,
  })}
  renderHeader={() => <MyHeader />} // optional
  headerHeight={HEADER_HEIGHT} // optional
/>

Props

All props are optional, but if you are not rendering a header, you'd be probably better with the original TabView.

prop	description	default
animatedValue?	Optionally controlled animated value.	new Animated.Value(0)
headerHeight?	Header component height. It is computed on layout. Providing it is just an optimization.	0
tabBarHeight?	Tab bar height.	49
tabBarProps?	Props passed to the tab bar component.	undefined
renderHeader?	Header rendered on top of the tab bar.	() => null
headerContainerStyle?	Styles applied to header and tabbar container.	undefined
preventTabPressOnGliding?	Prevent tab press if screen is gliding. Ignored if renderTabBar is provided.	true
disableSnap?	Disable the snap animation.	false
renderTabBar?	Same as renderTabBar of the original TabView, but with the additional isGliding property.	undefined
snapThreshold?	Percentage of header height to make the snap effect. A number between 0 and 1.	0.5
onHeaderHeightChange?	Callback fired when the headerHeight state value inside CollapsibleTabView will be updated in the onLayout event from the tab/header container. Useful to call layout animations. Example: () => {LayoutAnimation.configureNext(preset)};	undefined
routeKeyProp?	The property from the routes map to use for the active route key.	key

useCollapsibleScene

A hook to get all props and ref for the animated component in order to make the collapsible tabs work.

Works with:

• Animated.ScrollView
• Animated.FlatList

const FirstScene: React.FC<object> = ({ children }) => {
  const scrollPropsAndRef = useCollapsibleScene('firstScene');

  return (
    <Animated.ScrollView {...scrollPropsAndRef}>{children}</Animated.ScrollView>
  );
};

It includes de following values:

value	description
ref	Function to get ref from scrollable components inside the scene, and track in the Collapsible Tab View.
onScroll	Scroll event, enabled only for the focused route.
scrollEnabled	Disable scroll for unfocused routes is optional, but prevents weird/delayed animations if the user changes tabs and quickly start scrolling the new tab, before the animated value starting to track the new focused route.
contentContainerStyle	Content container style with paddingTop and minHeight. height.
progressViewOffset	Needed for the loading indicator to show correctly on android.
onMomentumScrollBegin	Callback to set isGliding to true.
onScrollEndDrag	Callback to sync the scroll of unfocused routes.
onMomentumScrollEnd	Callback to sync the scroll of unfocused routes.

createMaterialCollapsibleTopTabNavigator

Same API as the createMaterialTopTabNavigator (not-collapsible), with aditional collapsibleOptions prop, extending all props of CollapsibleTabView.

Contributing

While developing, you can run the example app to test your changes.

Please follow the angular commit message format.

Make sure your code passes TypeScript and ESLint. Run the following to verify:

yarn typescript
yarn lint

To fix formatting errors, run the following:

yarn lint -- --fix

Remember to add tests for your change if possible.

Changelog

1.3.0 (2020-12-04)

Features

• add content container minHeight (a633910), closes #6 #8