Union types vs enums vs const assertions

aboutEnums.ts

const ALIGN_LEFT = 'left'
const ALIGN_RIGHT = 'right'
type AlignUnion = typeof ALIGN_LEFT | typeof ALIGN_RIGHT

const foo: AlignUnion = 'bar'
const foo1: AlignUnion = 'left'
const foo2: AlignUnion = ALIGN_LEFT


enum AlignEnum {
  Left =  'left',
  Right = 'right'
}
const bar: AlignEnum = 'bar'
const bar1: 'left' // Its unique
const bar2: AlignEnum = AlignEnum.Left


const AlignConst = {
    Left: 'left',
    Right: 'right'
} as const

type AlignConst = typeof AlignConst[keyof typeof AlignConst];

const baz: AlignConst = 'baz'
const baz1: AlignConst = 'left'
const baz2: AlignConst = AlignConst.Left