<script type="text/javascript"> console.log(JSON.stringify({ x: 5, y: 6 })); console.log(JSON.stringify([new Number(3), new String('false'), new Boolean(false)])); console.log(JSON.stringify({ x: [10, undefined, function(){}, Symbol('')] })); console.log(JSON.stringify(new Date(2006, 0, 2, 15, 4, 5))); </script>输出结果:{"x":5,"y":6}