browser-notification/es/index.js

Small library built around browsers native Notification-API adding useful default behaviour.

var settings = {
  ignoreFocused: true,
  timeout: 0,
  cooldown: 0
};
var available = false;
var cooldownActive = false;
var focused = true;

function initNotifications(options) {
  // Handle old browsers - this way we can skip polyfill Promise and Object.assign
  if (!window.hasOwnProperty('Notification')) {
    console.info('This browser does not support notifications');

    // Mock promise always resolving to false
    return {
      then: function then(fn) {
        return fn(false);
      }
    };
  }

  settings = Object.assign({}, settings, options);

  window.onfocus = function () {
    focused = true;
  };

  window.onblur = function () {
    focused = false;
  };

  var availablePromise = new Promise(function (resolve, reject) {
    if (Notification.permission === 'granted') {
      resolve(true);
    } else if (Notification.permission !== 'denied') {
      Notification.requestPermission().then(function (permission) {
        if (permission === 'granted') {
          resolve(true);
        }
        resolve(false);
      });
    } else {
      resolve(false);
    }
  });

  availablePromise.then(function (result) {
    available = result;
  });

  return availablePromise;
}

function notify(title, notifyOptions) {
  if (!available || settings.ignoreFocused && focused || cooldownActive) {
    return null;
  }

  var notification = new Notification(title, notifyOptions);

  notification.onclick = function () {
    window.focus();
    notification.close();
  };

  if (settings.timeout !== 0) {
    window.setTimeout(function () {
      notification.close();
    }, settings.timeout);
  }

  if (settings.cooldown !== 0) {
    cooldownActive = true;
    window.setTimeout(function () {
      cooldownActive = false;
    }, settings.cooldown);
  }

  return notification;
}

export { initNotifications, notify };