Here is the object
{ a: 1, b: { c: { d: 2 }, e: 3 } }
Here is the map
{ 'a': 'aaa', 'b': 'bbb', 'b.c.d': 'bcd' } Here is the expected result.
{ aaa: 1, bbb: { c: { bcd: 2 }, e: 3 } } I know there's a function in lodash _.get could get the value like b.c.d.
But how can I change the key name with the map?
You can do this recursively by keeping track of the current path and building a key into the map with that:
let o = {a: 1,b: {c: {d: 2},e: 3}} let map = { 'a': 'aaa', 'b': 'bbb', 'b.c.d': 'bcd' } function makeObj(obj, map, p=[]) { let ret = {} Object.entries(obj).forEach(([k, v]) => { let path = p.concat(k) // add onto current path let mapKey = map[path.join('.')] || k ret[mapKey] = (typeof v === 'object') ? makeObj(v, map, path) // if an object recurse and pass on the current path : v // otherwise set the value }) return ret } console.log(makeObj(o, map))