版权声明:Hi https://blog.csdn.net/qq_33417486/article/details/83155637
判断对象是否为空:
if(isEmpty(obj)){
...
}else{
...
}
function isEmpty(obj){
for(var o in obj){
return false;
}
return true;
}
判断对象是否为null
if(obj == null){
...
}