const SiteClient = require('datocms-client').SiteClient;
const client = new SiteClient('YOUR-API-TOKEN');
client.menuItems.all({
  filter: {
    ids: '42,554'
  }
})
.then((menuItems) => {
    menuItems.forEach((menuItem) => {
      console.log(menuItem);
    });
  })
.catch((error) => {
  console.error(error);
});

> node example.js
{
  "id": "34",
  "label": "Posts",
  "externalUrl": "",
  "position": 1,
  "openInNewTab": true,
  "itemType": "44",
  "parent": null,
  "children": [
    "34"
  ]
}