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In ES2017:

const obj = { a: 1, b: 2 }

Object.entries(obj).map(([key, value]) => /* do what you want */)

ES2015:

const obj = { a: 1, b: 2 }

Object.keys(obj).map(key => {
    const value = obj[key]
    /* do what you want */
})

.map returns an Array. If you want an Object back, use .reduce and build the Object.