map default value js code example

Example 1: js map constructor

let myMap = new Map([
  [1, 'one'], // [key, value]
  [2, 'two'],
  [3, 'three'],
]) // from MDN

Example 2: map in javascript

['elem', 'another', 'name'].map((value, index, originalArray) => { 
  console.log(.....)
});