Your Object is not valid in javascript. You can do the following:
const arr = [ { "id": "11", "value" : "9999","sample":"1"},
{ "id": "22", "value" : "8888","sample":"2"},
{ "id": "33", "value" : "7777","sample":"3"}
]
const obj = {}
arr.forEach(({id, value, sample}) => {
obj[id] = {value, sample}
})
console.log(obj)
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