Answers for "add key value using map javascript"

map add key to object in array javascript

const newArr = [
  {name: 'eve'},
  {name: 'john'},
  {name: 'jane'}
].map(v => ({...v, isActive: true}))

js add to Map

// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map/set
const map = new Map();
map.set("key", "value");