原生JS实现$.param() 函数的方法

var personObj = {
 name:'cheny0815',
 age:24,
 c:[{
  id:1,
  name:2
 },{
  id:2,
  name:3
 }],
 other:{
  a:1,
  b:{
   c:2,
   d:{
    a:1,
    b:{
     e:1,
     f:2
    }
   }
  }
 },
}
var nextStr = '';
function changeDataType(obj){
 let str = ''
 if(typeof obj == 'object'){
  for(let i in obj){
   if(typeof obj[i] != 'function' && typeof obj[i] != 'object'){
    str += i + '=' + obj[i] + '&' ;
   }else if (typeof obj[i] == 'object'){
    nextStr = '';
    str += changeSonType(i, obj[i])
   }
  }
 }
 return str.replace(/&$/g, '');
}
function changeSonType(objName, objValue){
 if(typeof objValue == 'object'){
  for(let i in objValue){
   if(typeof objValue[i] != 'object'){
    let value = objName + '[' + i + ']=' + objValue[i];
    nextStr += encodeURI(value) + '&';
   }else{
    changeSonType(objName + '[' + i + ']', objValue[i]);
   }
  }
 }
 return nextStr;
}
var resultParam = $.param(personObj);
var resultMyself = changeDataType(personObj);
document.write('resultMyself===>' + resultMyself + '<br><hr>')
document.write('resultParam ===>' + resultParam + '<br><hr>')
document.write('resultMyself === resultParam ===>' + (resultMyself === resultParam))