Javascript: How to limit Add/Remove HTML text rows

Question

I'm working on a webpage that has some HTML text input fields (first/last name, street address, city, state, zip)

These are in rows that can have a Add/Remove button and a check box on the side for removal.

Below is code that works but I don't quite understand JS all that well. I need to modify this code so I can limit the amount of rows that are added by the user.

Thank you in advanced you sweet sweet people of SOF!

function addRow(tableID) {

        var table = document.getElementById(tableID);
        var rowCount = table.rows.length;
        var row = table.insertRow(rowCount);
        var colCount = table.rows[1].cells.length;
        for(var i=0; i<colCount; i++) {
            var newcell = row.insertCell(i);
            newcell.innerHTML = table.rows[1].cells[i].innerHTML;
            //alert(newcell.childNodes);
            switch(newcell.childNodes[0].type) {
                case "text":
                        newcell.childNodes[0].value = "";
                        break;
                case "checkbox":
                        newcell.childNodes[0].checked = false;
                        break;
                case "select-one":
                        newcell.childNodes[0].selectedIndex = 0;
                        break;
            }
        }
    }

    function deleteRow(tableID) {
        try {
        var table = document.getElementById(tableID);
        var rowCount = table.rows.length;
        for(var i=0; i<rowCount; i++) {
            var row = table.rows[i];
            var chkbox = row.cells[0].childNodes[0];
            if(null != chkbox && true == chkbox.checked) {
                if(rowCount <= 2) {
                    alert("Cannot delete all the rows.");
                    break;
                }
                table.deleteRow(i);
                rowCount--;
                i--;
            }


        }
        }catch(e) {
            alert(e);
        }
    }

Forge Forge · Accepted Answer · 2017-08-30T02:28:52

I got it!

function addRow(tableID) {

        var table = document.getElementById(tableID);
        var rowCount = table.rows.length;
        var row = table.insertRow(rowCount);
        var colCount = table.rows[1].cells.length;
        for(var i=0; i<colCount; i++) {
            if(rowCount >=11) {
                alert("Too many rows");
                break;
            }
            var newcell = row.insertCell(i);
            newcell.innerHTML = table.rows[1].cells[i].innerHTML;
            switch(newcell.childNodes[0].type) {
                case "text":
                        newcell.childNodes[0].value = "";
                        break;
                case "checkbox":
                        newcell.childNodes[0].checked = false;
                        break;
                case "select-one":
                        newcell.childNodes[0].selectedIndex = 0;
                        break;
            }
        }
    }

    function deleteRow(tableID) {
        try {
        var table = document.getElementById(tableID);
        var rowCount = table.rows.length;
        for(var i=0; i<rowCount; i++) {
            var row = table.rows[i];
            var chkbox = row.cells[0].childNodes[0];
            if(null != chkbox && true == chkbox.checked) {
                if(rowCount <= 2) {
                    alert("Cannot delete all the rows.");
                    break;
                }
                table.deleteRow(i);
                rowCount--;
                i--;
            }


        }
        }catch(e) {
            alert(e);
        }
    }

Javascript: How to limit Add/Remove HTML text rows

1 Answers