$(‘button‘).on(‘click‘, function(event) {	event.preventDefault();	/* Act on the event */	$.ajax({		url: ‘/ajax/test‘,		type: ‘get‘,		dataType: ‘json‘,		success:function(data){			$(‘div‘).html(data.tips);		},		error:function(data){			alert(‘error‘);		}	});});

app.get(‘/ajax/test‘,function(req,res){  var ajaxTest={    tips:"you are not alone"  };  res.send(ajaxTest);});