SOURCE

var list = [
    {
        "id": 1,
        "modes": "CHARTBAR_1",
    },
    {
        "id": 2,
        "modes": "CHARTBAR_1",
    },
    {
        "id": 3,
        "modes": "CHARTBAR_2",
    },
    {
        "id": 4,
        "modes": "CHARTBAR_2",
    },
    {
        "id": 5,
        "modes": "CHARTBAR_3",
    },
    {
        "id": 6,
        "modes": "CHARTBAR_4",
    },
    {
        "id": 7,
        "modes": "CHARTBAR_4",
    },
    {
        "id": 8,
        "modes": "CHARTBAR_1",
    },
    {
        "id": 9,
        "modes": "CHARTBAR_1",
    },
    {
        "id": 10,
        "modes": "CHARTBAR_1",
    },
]

function getListGroupBy(list, key) {
    var keysArr = list.map(item=>item[key])
    var keys = [...new Set(keysArr)]
    var newList = keys.map(item=> {
        return {
            [key]: item,
            list: list.filter(i=>i[key] == item)
        }
    })
    return newList
}

var newList = getListGroupBy(list, 'modes')
console.log(newList)