Chrome sendrequest error: TypeError: Converting circular structure to JSON

I've got the following... chrome.extension.sendRequest({ req: "getDocument", docu: pagedoc, name: 'name' }, function(response){ var efjs = response.reply; }); which calls the following.. case "getBrowserForDocumentAttribute": alert("ZOMG HERE"); sendResponse({ reply: getBrowserForDocumentAttribute(request.docu,request.name) }); break; However, my code never reaches "ZOMG HERE" but rather throws th

[yamadar]

循環参照をJSON化することは出来ませんよ。