Using spread operator to update an object value

https://stackoverflow.com/questions/49491393/using-spread-operator-to-update-an-object-value

  /**
     * * setLocalStorageUpgradePremiumBySchool
     * @param {*} member_expire_vip
     */
    setLocalStorageUpgradePremiumBySchool(member_expire_vip) {
        let updateMemberProfile = {
            ...sessionStorageService.getMemberProfile(),
            member_is_premium: true,
            member_expire_vip: member_expire_vip,
            member_subscription: {
                subs_type: "school",
            },
        };

        sessionStorageService.setMemberProfile(updateMemberProfile);
    },