Chrome中的本地存储无法正常工作

Question

选项页面

// gets button from page
var checkButton = document.getElementById('saveCheck');

// initiates check fucntion when clicked 
checkButton.addEventListener('click', check);

// starts when youtube setting is saved
function check() {
  console.log('Check starts');

  //initiates if checkbox is checked
  if (check.checked) {
    console.log('its checked');
    localStorage.youtube = 1;
  } else {
    console.log('it isnt checked');
    localStorage.youtube = 0;
  }
}

console.log(localStorage.youtube);

这部分工作完美，但是当我尝试通过我的扩展的background.js页面访问存储在本地存储中的数据时，它不会为值返回null

BACKGROUND.JS

var ytcheck = localStorage.getItem('youtube');
console.log(ytcheck);