How to set `key` for <th /> in <Table /> ?

What problem does this feature solve?

Normally, Antd sets auto-Increment number as key for <th />. In most of the cases, it’s fine.

But, when the columns changes frequently, this will cause some unnecessary unmount and mount. Especially when I use a React component as some columns’ title.

What does the proposed API look like?

const columns = [];

// when set columns, it can use the key for `<th />`, not only `<td />`
columns.push({
  title: <SomeComponent />,
  dataIndex: 'name',
  key: 'name'
});

return <Table columns={columns} />;

[yesmeck]

Try rc-table@6.1.4, will use column.key || column.dataIndex as key

[afc163]

Can we use column.key for th defaultly?