Detailed explanation of the steps to make a cross-domain iframe interface call with jQuery

(function(global){ global.Cross = { signalHandler: {}, on: function(signal, func){ this.signalHandler[signal] = func; }, call: function(win, domain, signal, data, callbackfunc){ var notice = {"signal": signal, "data": data}; if(!!callbackfunc){ notice["callback"] = "callback_" + new Date().getTime(); Cross.on(notice["callback"], callbackfunc); } var noticeStr = JSON. string ify(notice); win.postMessage(noticeStr, domain); } }; $(window).on("message", function(e) { var realEvent = e.originalEvent, data = realEvent.data, swin = realEvent.source, origin = realEvent.origin, protocol; try { protocol = JSON.parse(data); var result = global.Cross.signalHandler[protocol.signal].call(null, protocol.data); if(!!protocol["callback"]){ Cross.call(swin, origin, protocol["callback"], {result: result}); } if(/^callback_/.test(protocol.signal)){ delete Cross.signalHandler[protocol.signal]; } } catch (e) { console.log(e); throw new Error("cross error."); } }); })(window);

      
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