jquery - Check if there's a name present in json -

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I want to know that the json file has a 'archive' of the contents if it does and if it does not exist Many JSON files are present, so I will show it with a name and without the name of one.

I do not know what is the best way to check my jQuery function.

JSON 

  // name store is present // {archive: {image: {}, product: {}, // etc}}  < / Image> {name: {}, content: {}, // etc}}  
  // name does not exist // // catalog (or text page):   
 What I try to do is something like this:  
  function widget (catid, kathraff) {var url = catHref; $ .getJSON (url, function (jsn) {if (collection == true) {console.log ('yes products'); // create some HTML; and {console.log ('no sir no products'); / I have tried things like 'proprieti' or 'typewrite' or 'undefined' etc. but not with any luck. But can not it be difficult?  
 Anyone?   
 
 
  if (json ["archive"]) {...}   
 or  
  if (json.collection) {...}   
 You obviously  undefined  and / or  null  for example,  
  if (json .collection! == undefined) {... }   
 If it can be sent as  false .    
, div>

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