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Capgo

Getting Started

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  1. Install the package

    Terminal-Fenster
    npm i @capgo/capacitor-compass

  2. Sync with native projects

    Terminal-Fenster
    npx cap sync

iOS Setup

On iOS, compass access requires location permission. Add the following to your Info.plist:

<key>NSLocationWhenInUseUsageDescription</key>
<string>We need location permission to access the compass</string>

Android Setup

No additional setup required. The plugin uses the device’s magnetometer and accelerometer sensors.

Usage

Import the plugin and use its methods to read compass heading:

import { CapgoCompass } from '@capgo/capacitor-compass';


// Get current heading once
const getCurrentHeading = async () => {
  const { value } = await CapgoCompass.getCurrentHeading();
  console.log('Current heading:', value, 'degrees');
};


// Start continuous heading updates
const startCompass = async () => {
  // Start listening for updates
  await CapgoCompass.startListening();


  // Add listener for heading changes
  const handle = await CapgoCompass.addListener('headingChange', (event) => {
    console.log('Heading:', event.value, 'degrees');
  });


  // Later, to stop listening:
  // await CapgoCompass.stopListening();
  // await handle.remove();
};


// Check permissions
const checkPermission = async () => {
  const status = await CapgoCompass.checkPermissions();
  console.log('Permission status:', status.compass);
};


// Request permissions
const requestPermission = async () => {
  const status = await CapgoCompass.requestPermissions();
  if (status.compass === 'granted') {
    console.log('Compass access granted');
  }
};

API Reference

getCurrentHeading()

Get the current compass heading in degrees.

const result = await CapgoCompass.getCurrentHeading();
// Returns: { value: number } - heading in degrees (0-360)

startListening()

Start listening for compass heading changes. Must be called before heading events are emitted.

await CapgoCompass.startListening();

stopListening()

Stop listening for compass heading changes.

await CapgoCompass.stopListening();

addListener(‘headingChange’, callback)

Add a listener for heading change events.

const handle = await CapgoCompass.addListener('headingChange', (event) => {
  console.log('Heading:', event.value);
});


// Remove listener when done
await handle.remove();

removeAllListeners()

Remove all registered listeners.

await CapgoCompass.removeAllListeners();

checkPermissions()

Check current permission status.

const status = await CapgoCompass.checkPermissions();
// Returns: { compass: 'prompt' | 'granted' | 'denied' }

requestPermissions()

Request permission to access compass data.

const status = await CapgoCompass.requestPermissions();

getPluginVersion()

Get the native plugin version.

const { version } = await CapgoCompass.getPluginVersion();

Complete Example

import { CapgoCompass } from '@capgo/capacitor-compass';


export class CompassService {
  private listenerHandle: any = null;


  async init() {
    // Check and request permissions
    const status = await CapgoCompass.checkPermissions();
    if (status.compass !== 'granted') {
      const result = await CapgoCompass.requestPermissions();
      if (result.compass !== 'granted') {
        throw new Error('Compass permission denied');
      }
    }
  }


  async startTracking(onHeadingChange: (heading: number) => void) {
    // Start listening for updates
    await CapgoCompass.startListening();


    // Add event listener
    this.listenerHandle = await CapgoCompass.addListener(
      'headingChange',
      (event) => {
        onHeadingChange(event.value);
      }
    );
  }


  async stopTracking() {
    if (this.listenerHandle) {
      await this.listenerHandle.remove();
      this.listenerHandle = null;
    }
    await CapgoCompass.stopListening();
  }


  async getHeading(): Promise<number> {
    const { value } = await CapgoCompass.getCurrentHeading();
    return value;
  }


  getCardinalDirection(heading: number): string {
    const directions = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW'];
    const index = Math.round(heading / 45) % 8;
    return directions[index];
  }
}

Platform Notes

iOS

  • Requires iOS 10.0+
  • Uses Core Location for heading data
  • Requires location permission (NSLocationWhenInUseUsageDescription)
  • Heading updates are continuous when listening is active

Android

  • Requires Android 6.0 (API 23)+
  • Uses accelerometer and magnetometer sensors
  • No special permissions required for compass sensors
  • Heading is calculated from sensor fusion

Web

  • Not supported on web platform
  • Methods will throw errors when called