Array.flat will flatten a multidemsional array. It will flatten 1 level by default.
You can specify how many levels to flatten.
flatMap flattens the result of a map.
trimStart removes whitespace from the start of a string.
And trimEnd removes it from the end.
Create an object from an array of properties. Complements Object.entries.
Convert a function to a string.
Catch doesn't need an Error object anymore.