stuff = [
    { value: 'elevator', checked: true },
    { value: 'something', checked: false },
    { value: 'else', checked: true },
]

{
    'elevator': true,
    'something: false,
    'else': true,
}

[
    { 'elevator': true },
    { 'something': false },
    { 'else': true }
];

var output  = stuff.reduce( (a,c) => (a[c.value] = c.checked, a) , {} )

stuff.reduce( (a,c) => Object.assign( {}, a, { [c.value] : c.checked })  , {} )