Square brackets in object property name

Question

I am new in react project, recently i find this codings of an const

const FILTER_TITLES = {
    [SHOW_ALL]: 'Toutes',
    [SHOW_ACTIVE]: 'En cours',
    [SHOW_COMPLETED]: 'Terminés',
}

Apparently the object FILTER_TITLES has properties with [ ] tags,

Can some expert explain this to me? As i know the Property name no need [ ] or just " " in JSON.

Thanks.