takaFormat.js

var total = 1102688;
var totalToBDformat = total.toLocaleString('bn-BD', { minimumFractionDigits: 2 }); // ১১,০২,৬৮৮.০০

var numbers = {
    '০': 0,
    '১': 1,
    '২': 2,
    '৩': 3,
    '৪': 4,
    '৫': 5,
    '৬': 6,
    '৭': 7,
    '৮': 8,
    '৯': 9
};

replaceNumbers function (input) {
    var output = [];
    for (var i = 0; i < input.length; ++i) {
        if (numbers.hasOwnProperty(input[i])) {
            output.push(numbers[input[i]]);
        } else {
            output.push(input[i]);
        }
    }
    return output.join('');
}

replaceNumbers(totalToBDformat); // 11,02,688.00