Use a numeric separator to format big numbers with underscores.
By passing a Boolean object to the filter() method, all null values will be changed to false and eliminated.
Destructure arrays and objects
Combine the destructuring of objects and arrays into a single assignment procedure.
Rename variables in object destructuring
Rename variables in the destructuring assignment by writing a colon followed by the new name.
Arrow function returning objects
Return an object implicitly by enclosing it in brackets.