Calculate from 3 inputfield in dynamic form yii2

Question

In my dynamic form I need to calculate data from from 3 fields(qty,rate,discount) and pass it to unitdiscount. The formula will be - unitdiscount = ((qty*rate*discount)/10

Answer 1

Try this way :

function getUdisc(item) {
    var index  = item.attr("id").replace(/[^0-9.]/g, "");
    var total = current = next = previous = 0;

    var id = item.attr("id");
    var myString = id.split("-").pop();

    if (myString == "qty") {
        fetch1 = index.concat("-discount");
        fetch2 = index.concat("-rate");
    } else if (myString == "discount") {
        fetch1 = index.concat("-qty");
        fetch2 = index.concat("-rate");
    } else {
        fetch1 = index.concat("-discount");
        fetch2 = index.concat("-qty");
    }

    temp1 = $("#productsales-"+fetch1+"").val();
    temp2 = $("#productsales-"+fetch2+"").val();

    if (!isNaN(temp1) && temp1.length != 0) {
        next = temp1;
    }

    if (isNaN(temp2) || temp2.length == 0) {
        previous = temp2;
    }

    current = item.val();
    if (isNaN(current) || current.length == 0) {
        current = 0;
    }

    if (!isNaN(current) && !isNaN(next) && !isNaN(previous)) {
        total = (parseFloat(current) + parseFloat(next) + parseFloat(previous)).toFixed(2);
    }

    udiscField = "productsales-".concat(index).concat("-udisc");

    $("#"+udiscField+"").val(total);
}