what kind of method is map in javascript code example

Example 1: javascript map

const numbers = [0,1,2,3];

console.log(numbers.map((number) => {
  return number;
}));

Example 2: javascript map

array.map( item => item.id )

array2.map( item => item.toString() )

array2.map( item => item * 3 )

// this will apply a transformation to all elements of an array
// "" item => something "" is the transformation (function)