Dynamically Add/Remove rows in HTML table using JavaScript

A good web design involves the better user interaction and ability to fetch the data in a better way. For fetching user data, you may have to create a form wherein user can add multiple entries and submit them simultaneously.

Thus for this you will need a way to add or remove fields dynamically into the HTML page. In my previous article, I had discussed about the way one can add dynamic form components into the web page.

In this article we will create a user interface where user can add/delete multiple rows in a form using JavaScript.

First check the user interface.
dynamic-add-delete-row-table-javascript

In this example, we have created a table which will display our html components. On pressing Add Row, a dynamic row will be created and added in the table. And on selecting the checkbox and pressingDelete Row, the row will be removed.

Following is the source.

Code

<HTML>
<HEAD>
    <TITLE> Add/Remove dynamic rows in HTML table </TITLE>
    <SCRIPT language="javascript">
        function addRow(tableID) {
 
            var table = document.getElementById(tableID);
 
            var rowCount = table.rows.length;
            var row = table.insertRow(rowCount);
 
            var cell1 = row.insertCell(0);
            var element1 = document.createElement("input");
            element1.type = "checkbox";
            cell1.appendChild(element1);
 
            var cell2 = row.insertCell(1);
            cell2.innerHTML = rowCount + 1;
 
            var cell3 = row.insertCell(2);
            var element2 = document.createElement("input");
            element2.type = "text";
            cell3.appendChild(element2);
 
        }
 
        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) {
                    table.deleteRow(i);
                    rowCount--;
                    i--;
                }
 
            }
            }catch(e) {
                alert(e);
            }
        }
 
    </SCRIPT>
</HEAD>
<BODY>
 
    <INPUT type="button" value="Add Row" onclick="addRow('dataTable')" />
 
    <INPUT type="button" value="Delete Row" onclick="deleteRow('dataTable')" />
 
    <TABLE id="dataTable" width="350px" border="1">
        <TR>
            <TD><INPUT type="checkbox" name="chk"/></TD>
            <TD> 1 </TD>
            <TD> <INPUT type="text" /> </TD>
        </TR>
    </TABLE>
 
</BODY>
</HTML>

For adding dynamic row in table, we have used insertRow() method. This method will insert a row at position specified by the index arguement. Also for removing row, we have used deleteRow() method.
Note that for inserting dynamic row, we have to created cells by using row.insertCell() method.

Web Developer

Saturday, June 4, 2011

Dynamically Add/Remove rows in HTML table using JavaScript

Code

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