JavaScript 開発者が知っておくべきトップ avigator API の機能

if (navigator.onLine) {
    console.log("You are online!");
} else {
    console.log("You are offline. Some features may be unavailable.");
}

// Adding event listeners for online and offline events
window.addEventListener('online', () => console.log('You are back online!'));
window.addEventListener('offline', () => console.log('You have gone offline.'));

console.log("Platform: ", navigator.platform);
console.log("User Agent: ", navigator.userAgent);
console.log("Language: ", navigator.language);

if (navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(position => {
        console.log(`Latitude: ${position.coords.latitude}, Longitude: ${position.coords.longitude}`);
    }, error => {
        console.error("Geolocation error: ", error);
    });
} else {
    console.log("Geolocation is not supported by this browser.");
}

navigator.clipboard.writeText("Hello, world!").then(() => {
    console.log("Text copied to clipboard successfully!");
}).catch(err => {
    console.error("Failed to copy text: ", err);
});

// Reading text from clipboard
navigator.clipboard.readText().then(text => {
    console.log("Text from clipboard: ", text);
}).catch(err => {
    console.error("Failed to read text: ", err);
});

navigator.permissions.query({name: 'geolocation'}).then(permissionStatus => {
    console.log('Geolocation permission state: ', permissionStatus.state);
    permissionStatus.onchange = () => {
        console.log('Permission state changed to: ', permissionStatus.state);
    };
});