Uncaught TypeError: Cannot read property 'hasOwnProperty' of null

1、错误描述

jquery-1.9.1.min.js:69 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.
send @ jquery-1.9.1.min.js:69
public.js:430 
Uncaught TypeError: Cannot read property 'hasOwnProperty' of null
    
at Object.<anonymous>  
at Function.each (jquery-1.9.1.min.js:35)
      
at HTMLTableElement.loadComplete    
at Object.success (jquery.jqGrid.src.js:2012)
    
at c (jquery-1.9.1.min.js:35)
    
at Object.fireWith [as resolveWith] (jquery-1.9.1.min.js:35)
    
at k (jquery-1.9.1.min.js:69)
    
at XMLHttpRequest.r (jquery-1.9.1.min.js:69)
porder.js:769 payType：1

Uncaught TypeError: Cannot read property 'hasOwnProperty' of null
    
at Object.<anonymous>  
at Function.each (jquery-1.9.1.min.js:35)
      
at HTMLTableElement.loadComplete    
at Object.success (jquery.jqGrid.src.js:2012)
    
at c (jquery-1.9.1.min.js:35)
    
at Object.fireWith [as resolveWith] (jquery-1.9.1.min.js:35)
    
at k (jquery-1.9.1.min.js:69)
    
at XMLHttpRequest.r (jquery-1.9.1.min.js:69)

2、错误原因

      hasOwnProperty()函数用于指示一个对象自身(不包括原型链)是否具有指定名称的属性，一般语法是：

     对象.hasOwnProperty(属性值)，如果对象为null，就会报错；在判断之前先判断对象是否为空

3、解决办法

if(对象 != null)

{

对象.hasOwnProperty(属性值)

}