js根據key值排序

const unordered = {
  '1': 'foo',
  '2': 'bar',
  '5': 'br',
  '13': 'ar',
  '111': 'baz'
};
 
const ordered = {};
Object.keys(unordered).sort().forEach(function(key) {
  ordered[key] = unordered[key];
});
console.log(JSON.stringify(ordered));

 對象動態添加新屬性：

 //創建obj對象
 var obj = new Object();
 //為對象添加動態屬性
 obj.userName = "admin";
 obj.passWord = "123456";
 //輸出
 console.log(obj);