JSON.stringify()console.log(JSON.stringify({ x: 5, y: 6 })); // Expected output: '{"x":5,"y":6}' console.log( JSON.stringify([new Number(3), new String("false"), new Boolean(false)]), ); // Expected output: '[3,"false",false]' console.log(JSON.stringify({ x: [10, undefined, function () {}, Symbol("")] })); // Expected output: '{"x":[10,null,null,null]}' console.log(JSON.stringify(new Date(2006, 0, 2, 15, 4, 5)));
