A problem about refactoring arrays

there is the following array:

const fData = [

{ownerName: "a", type: "1", total: 85}

{ownerName: "a", type: "2", total: 22}

{ownerName: "b", type: "1", total: 11}

{ownerName: "b", type: "2", total: 11}

{ownerName: "c", type: "1", total: 121}

{ownerName: "c", type: "2", total: 11}
]

want to reconstitute the following array:

[{ownerName: "a", "1": 85, "2": 22}

{ownerName: "b", "1": 11, "2": 11}

{ownerName: "c", "1": 121, "2": 11}

I am currently working on the following code:

let newName = map(uniq(ownerName), (item) => {
            return {
                ownerName: item,
            };
        });
        let newType = map(uniq(type), (item) => {
            return {
                type: item,
            };
        });

where uniq and map are libraries of referenced third-party lodash.
I don"t know how to write it down. For guidance, thank you

const fData = [ { ownerName: "a", type: "1", total: 85 }, { ownerName: "a", type: "2", total: 22 }, { ownerName: "b", type: "1", total: 11 }, { ownerName: "b", type: "2", total: 11 }, { ownerName: "c", type: "1", total: 121 }, { ownerName: "c", type: "2", total: 11 }, ] let tmpObj = {} for (let item of fData) { if (!tmpObj[item.ownerName]) { tmpObj[item.ownerName] = {} } tmpObj[item.ownerName][item.type] = item.total } let result = Object.entries(tmpObj).map(item => { item[1]['ownerName'] = item[0] return item[1] }) ---- typetotal? let tmpObj = fData.reduce((accumulator, currentValue, currentIndex, array) => { if (!accumulator[currentValue.ownerName]) { accumulator[currentValue.ownerName] = {} } if (!accumulator[currentValue.ownerName][currentValue.type]) { accumulator[currentValue.ownerName][currentValue.type] = 0 } accumulator[currentValue.ownerName][currentValue.type] += currentValue.total return accumulator }, {}) let result = Object.entries(tmpObj).map(item => { item[1]['ownerName'] = item[0] return item[1] })