10:00-12:00 and 10:30-12:30

10:30-12:00

[
    {
        "opens": "10:00",
        "closes": "12:00",
        "weekday": 5
    },
    {
        "opens": "16:00",
        "closes": "19:30",
        "weekday": 5
    },
    {
        "opens": "11:00",
        "closes": "12:30",
        "weekday": 5
    },
    {
        "opens": "17:00",
        "closes": "18:30",
        "weekday": 5
    }
]

[
    {
        "opens": "11:00",
        "closes": "12:00"
    },
    {
        "opens": "17:00",
        "closes": "18:30"
    }
]

this.filteredTimes.forEach((time, index, array) => {...});

let opens = this.momentTime(time.opens); //saving it to moment
let closes = this.momentTime(time.closes); //moment(time, 'HH:mm')

for(let i = 0; i < array.length; i++){...} //array === this.filteredTimes

let arrayOpens = this.momentTime(array[i].opens);
let arrayCloses = this.momentTime(array[i].closes);

if(arrayOpens.isBetween(opens, closes)){
   opens = arrayOpens.isAfter(opens) ? arrayOpens : opens;
}

let hour = {
    opens: opens.format('HH:mm'),
    closes: closes.format('HH:mm')
};

if(! openingHour.find(element => element.opens == hour.opens && element.closes == hour.closes)){
    openingHour.push(hour);
}