Find And Replace The key-value Pair in an Array of Object

replace.js

const personObject = [
    {
         "id":1,
         "name": "A",
         "experienceInYear": 5,
         "designation" : "senior associate" 
    },
    {
         "id":2,
         "name": "B",
         "experienceInYear": 3,
         "designation" : "associate"
    },
    {
         "id":3,
         "name": "C",
         "experienceInYear": 6,
         "designation" : "senior"
    }
]

const res = personObject.map(p => p.experienceInYear >= 6 ? {...p,designation: "lead"} : p)