view（）函数只创建 View 类的实例。不只是一个HTML字符串。为此你应该调用 render（）：

The view() function just creates an instance of the View class. Not just an HTML string. For that you should call render():

$returnHTML = view('job.userjobs')->with('userjobs', $userjobs)->render();
return response()->json(array('success' => true, 'html'=>$returnHTML));