Typescript error TS1005: ':' expected
(<any>Object).assign({}, state, { action.item_id: (<any>Object).assign({}, state[action.item_id], { label_value: action.value }) })
Source: stackoverflow.com
(<any>Object).assign({}, state, { action.item_id: (<any>Object).assign({}, state[action.item_id], { label_value: action.value }) })