@nativescript-community/ui-material-bottom-navigation

NativeScript Material Bottom navigation

Material Design's Bottom navigation component for NativeScript.

Contents

1. Installation
2. Changelog
3. FAQ
4. Usage
   • Plain NativeScript
   • Angular
   • Vue
   • React
5. API

Installation

ns plugin add @nativescript-community/ui-material-bottom-navigation

Be sure to run a new build after adding plugins to avoid any issues.

Changelog

FAQ

Usage

Plain NativeScript

IMPORTANT: Make sure you include xmlns:mds="@nativescript-community/ui-material-bottom-navigation" on the Page element.

XML

<Page xmlns:mdt="@nativescript-community/ui-material-bottom-navigation">
    <mdt:BottomNavigation width="100%" id="main-tabview" class="main-tabview"
                selectedIndexChanged="{{onSelectedIndexChanged}}"
                iosOverflowSafeArea="true" selectedIndex="0" tabsPosition="bottom" swipeEnabled="false">
            <!-- The bottom tab UI is created via TabStrip (the containier) and TabStripItem (for each tab)-->
            <mdt:TabStrip backgroundColor="{{ color('dark')}}" color="{{ color('blue')}}">
                <mdt:TabStripItem  class="tab-item">
                    <Image src="font://&#xe1b0;" class="fal"></Image>
                    <Label text="Home" ios:fontSize="10" android:fontSize="12"></Label>
                </mdt:TabStripItem>
                <mdt:TabStripItem class="tab-item">
                    <Label text="{{ L('search') }}" ios:fontSize="10" android:fontSize="12"></Label>
                    <Image src="font://&#xe024;" class="fal"></Image>
                </mdt:TabStripItem>
                <mdt:TabStripItem  class="tab-item">
                    <Label text="{{ L('trips') }}" ios:fontSize="10" android:fontSize="12"></Label>
                    <Image src="font://&#xf03a;" class="fal"></Image>
                </mdt:TabStripItem>
                <mdt:TabStripItem class="tab-item">
                    <Label text="{{ L('inbox') }}" ios:fontSize="10" android:fontSize="12"></Label>
                    <Image src="font://&#xf4b6;" class="fal" id="tab-inbox-icon-fal"></Image>
                </mdt:TabStripItem>
            </mdt:TabStrip>

            <!-- The number of TabContentItem components should corespond to the number of TabStripItem components -->
            <mdt:TabContentItem>
                <GridLayout>
                    <Label text="Home" class="h2 text-center"></Label>
                </GridLayout>
            </mdt:TabContentItem>
            <mdt:TabContentItem>
                <GridLayout>
                    <Label text="Search Page" class="h2 text-center"></Label>
                </GridLayout>
            </mdt:TabContentItem>
            <mdt:TabContentItem>
                <GridLayout>
                    <Label text="TRansactions" class="h2 text-center"></Label>
                </GridLayout>
            </mdt:TabContentItem>
            <mdt:TabContentItem>
                <GridLayout>
                    <Label text="Inbox" class="h2 text-center"></Label>
                </GridLayout>
            </mdt:TabContentItem>
        </mdt:BottomNavigation>
</Page>

CSS

BottomNavigation.bottom-nav {
    background-color: orangered;
    color: gold;
    font-size: 18;
}

MDTabStripItem.tabstripitem-active {
    background-color: teal;
}

MDTabStripItem.tabstripitem-active:active {
    background-color: yellowgreen;
}

MDTabContentItem.first-tabcontent {
    background-color: seashell;
    color: olive;
}
MDTabContentItem.second-tabcontent {
    background-color: slategray;
    color: aquamarine;
}
MDTabContentItem.third-tabcontent {
    background-color: blueviolet;
    color: antiquewhite;
}
BottomNavigation TabStrip {
    highlight-color: red;
}

NativeScript + Angular

import { NativeScriptMaterialTabsModule } from "@nativescript-community/ui-material-bottom-navigation/angular";

@NgModule({
    imports: [
        NativeScriptMaterialBottomNavigationModule,
        ...
    ],
    ...
})

    <MDBottomNavigation selectedIndex="1">
        <!-- The bottom tab UI is created via TabStrip (the containier) and TabStripItem (for each tab)-->
        <MDTabStrip>
            <MDTabStripItem>
                <Label text="Home"></Label>
                <Image src="font://&#xf015;" class="fas"></Image>
            </MDTabStripItem>
            <MDTabStripItem class="special">
                <Label text="Account"></Label>
                <Image src="font://&#xf007;" class="fas"></Image>
            </MDTabStripItem>
            <MDTabStripItem class="special">
                <Label text="Search"></Label>
                <Image src="font://&#xf00e;" class="fas"></Image>
            </MDTabStripItem>
        </MDTabStrip>

        <!-- The number of TabContentItem components should corespond to the number of TabStripItem components -->
        <MDTabContentItem>
            <GridLayout>
                <Label text="Home Page" class="h2 text-center"></Label>
            </GridLayout>
        </MDTabContentItem>
        <MDTabContentItem>
            <GridLayout>
                <Label text="Account Page" class="h2 text-center"></Label>
            </GridLayout>
        </MDTabContentItem>
        <MDTabContentItem>
            <GridLayout>
                <Label text="Search Page" class="h2 text-center"></Label>
            </GridLayout>
        </MDTabContentItem>
    </MDBottomNavigation>

NativeScript + Vue

import BottomNavigation from '@nativescript-community/ui-material-bottom-navigation/vue';

Vue.use(BottomNavigation);

<MDBottomNavigation selectedIndex="1">
        <!-- The bottom tab UI is created via TabStrip (the containier) and TabStripItem (for each tab)-->
        <MDTabStrip>
            <MDTabStripItem>
                <Label text="Home"></Label>
                <Image src="font://&#xf015;" class="fas"></Image>
            </MDTabStripItem>
            <MDTabStripItem class="special">
                <Label text="Account"></Label>
                <Image src="font://&#xf007;" class="fas"></Image>
            </MDTabStripItem>
            <MDTabStripItem class="special">
                <Label text="Search"></Label>
                <Image src="font://&#xf00e;" class="fas"></Image>
            </MDTabStripItem>
        </MDTabStrip>

        <!-- The number of TabContentItem components should corespond to the number of TabStripItem components -->
        <MDTabContentItem>
            <GridLayout>
                <Label text="Home Page" class="h2 text-center"></Label>
            </GridLayout>
        </MDTabContentItem>
        <MDTabContentItem>
            <GridLayout>
                <Label text="Account Page" class="h2 text-center"></Label>
            </GridLayout>
        </MDTabContentItem>
        <MDTabContentItem>
            <GridLayout>
                <Label text="Search Page" class="h2 text-center"></Label>
            </GridLayout>
        </MDTabContentItem>
    </MDBottomNavigation>

NativeScript + React

First, register the component before any of your React NativeScript app renders. A good place to put this code is in your entrypoint file (which may be called src/app.ts or similar), before the ReactNativeScript.start function is called. Here's how to install it:

import { registerTabNavigationBase } from '@nativescript-community/ui-material-core/tab-navigation-base/react';
import { registerBottomNavigation } from '@nativescript-community/ui-material-bottom-navigation/react';

registerTabNavigationBase();
registerBottomNavigation();

When available (I've not implemented it at the time of writing, but intend to in time), it would be best to use this component via the bottomNavigationNavigatorFactory() API exported by React NativeScript Navigation, as it makes nested navigation easy, but here's how to use it directly:

import * as React from 'react';

export function BottomNavigation() {
    const [selectedIndex, setSelectedIndex] = React.useState(0);

    return (
        <bottomNavigation
            selectedIndex={selectedIndex}
            onSelectedIndexChanged={(args) => {
                setSelectedIndex(args.newIndex);
            }}
            style={{ backgroundColor: 'orange' }}
        >
            {/* The bottomTab UI is created via tabStrip (the container) and tabStripItem (for each tab) */}
            <tabStrip nodeRole="tabStrip" style={{ backgroundColor: 'red' }}>
                <tabStripItem nodeRole="items">
                    <label nodeRole="label">Home</label>
                    <image nodeRole="image" src="font://&#xf015;" className="fas" />
                </tabStripItem>
                <tabStripItem nodeRole="items">
                    <label nodeRole="label">Account</label>
                    <image nodeRole="image" src="font://&#xf007;" className="fas" />
                </tabStripItem>
                <tabStripItem nodeRole="items">
                    <label nodeRole="label">Search</label>
                    <image nodeRole="image" src="font://&#xf00e;" className="fas" />
                </tabStripItem>
            </tabStrip>

            {/* The number of tabContentItem components should corespond to the number of TabStripItem components */}
            <tabContentItem nodeRole="items">
                <gridLayout style={{ backgroundColor: 'blue' }}>
                    <label style={{ color: 'white' }}>Home Page</label>
                </gridLayout>
            </tabContentItem>
            <tabContentItem nodeRole="items">
                <gridLayout style={{ backgroundColor: 'cyan' }}>
                    <label style={{ color: 'black' }}>Account Page</label>
                </gridLayout>
            </tabContentItem>
            <tabContentItem nodeRole="items">
                <gridLayout style={{ backgroundColor: 'magenta' }}>
                    <label style={{ color: 'black' }}>Search Page</label>
                </gridLayout>
            </tabContentItem>
        </bottomNavigation>
    );
}

Troubleshooting

If you see an error like this when writing e.g. <bottomNavigation> into your JSX:

Property 'bottomNavigation' does not exist on type 'JSX.IntrinsicElements'.ts(2339)

Make sure that you have:

1. Installed the react-nativescript npm module.
2. Installed the @types/react npm module, strictly with the exact version provided in the React NativeScript starter template.
3. Run the postinstall script that comes with the React NativeScript template – npm run postinstall – to patch @types/react.
4. Registered the component as described above (i.e. import and run the registerTabNavigationBase() and registerBottomNavigation() methods).
5. If using Visual Studio Code, option-click the import @nativescript-community/ui-material-bottom-navigation/react to jump to the file; opening the file will force it to load its provided typings.

API

Attributes

Name	Type	Description
items	Array	Gets or sets the items of the BottomNavigation.
selectedIndex	number	Gets or sets the selectedIndex of the BottomNavigation.
swipeEnabled	boolean	Gets or sets the swipe enabled state of the Tabs.
offscreenTabLimit	number	Gets or sets the number of offscreen preloaded tabs of the Tabs.
tabStrip	TabStrip	Gets or sets the tab strip of the BottomNavigation.
tabsPosition	"top", "bottom"	Gets or sets the position state of the Tabs. Default value: top
iOSTabBarItemsAlignment	"leading", "justified", "center", "centerSelected"	iOS Only: Gets or set the MDCTabBarAlignment of the tab bar icons in iOS. Default value: justified

Events

Name	Description
selectedIndexChanged	Emitted when the selectedIndex property is changed.
loaded	Emitted when the view is loaded.
unloaded	Emitted when the view is unloaded.
layoutChanged	Emitted when the layout bounds of a view changes due to layout processing.