如何在一个对象中存储localStorage数据？

// 创建一个空对象
var dataObject = {};

// 存储数据到localStorage
localStorage.setItem('key1', 'value1');
localStorage.setItem('key2', 'value2');
localStorage.setItem('key3', 'value3');

// 将localStorage中的数据存储到对象中
for (var i = 0; i < localStorage.length; i++) {
  var key = localStorage.key(i);
  var value = localStorage.getItem(key);
  dataObject[key] = value;
}

// 将对象转换为字符串形式
var dataString = JSON.stringify(dataObject);

// 存储对象字符串到localStorage
localStorage.setItem('data', dataString);