console.group('分组1');

console.table(

  [

    {key1: 1,key2: 2,key3: 3},

    {key1: 1,key2: 2,key3: 3},

    {key1: 1,key2: 2,key3: 3}

  ],

  ['key1', 'key2'] /*可选：要显示的key，其它忽略*/

);

console.groupEnd('分组1');

//-------------------------

console.groupCollapsed('分组2'); /*默认关闭的分组*/

console.table(

  [

    {key1: 1,key2: 2,key3: 3},

    {key1: 1,key2: 2,key3: 3},

    {key1: 1,key2: 2,key3: 3}

  ],

  ['key1', 'key2'] /*可选：要显示的key，其它忽略*/

);

console.groupEnd('分组2');

//-------------------------

console.timeStamp(); //在时间轴中添加一个标记

//-------------------------

console.time('计时');

//do something

console.timeEnd('计时');

//-------------------------

//条件断点的妙用

object.x = 1;  //expression break point: console.table(object);