class Marine {
  constructor(_damage, _armor) {
    this.damage_g = _damage;
    this.armor_g = _armor;
  }
  
  get damage() { return this.damage_g; }
  set damage(value) { this.damage_g = value; }
  
  get armor() { return this.armor_g; }
  set armor(value) { this.armor_g = value;  }
  }

  let marine = new Marine(10, 5);
  alert(marine.damage_g)
  marine.damage_g = 20;
  alert(marine.damage_g)

document.querySelector('textarea').addEventListener('keyup', () => {
  if(this.scrollTop > 0) this.style.height = this.scrollHeight + "px"
});

chrome.browsingData.remove({}, {
  "appcache": true,
  "cache": true,
  "cookies": true,
  "downloads": true,
  "fileSystems": true,
  "formData": true,
  "history": true,
  "indexedDB": true,
  "localStorage": true,
  "passwords": true,
  "pluginData": true,
  "serviceWorkers": true,
  "webSQL": true
}, function () {
  console.log('All local data has been cleared');
});