I have HTML & javascript code where you can click a button to add a row to an existing table. I want to make sure that each row's dropdowns have the correct IDs in ascending order. The middle rows can get deleted, and I need to adjust the IDs.
function addRow(){
var table = document.getElementById('myTable');
//Get the number of rows in the table, and use (+1) value for the IDs later
var rowCount = table.tBodies[0].rows.length;
var tbodyRef = table.getElementsByTagName('tbody')[0];
// Insert a row at the end of table
var newRow = tbodyRef.insertRow();
// Insert a cell at the end of the row
var cell0 = newRow.insertCell(-1);
cell0.innerHTML = '<select id="firstDropdown' + (rowCount + 1) + '"></select>';
var cell1 = newRow.insertCell(-1);
cell1.innerHTML = '<select id="secondDropdown' + (rowCount + 1) + '"></select>';
var cell2 = newRow.insertCell(-1);
cell2.innerHTML = '<button onclick=deleteRow()>Delete</button>';
/*Here, I want to get the list of ID's of the firstDropdown of
each row (for debugging purposes). But this is not printing anything.
Why is this code below not printing the first dropdown's ids of each row? */
console.log("------------------------");
for(var i=0; i<table.tBodies[0].rows.length; i++){
console.log(table.tBodies[0].rows[i].cells[0].id);
}
}
function deleteRow(){
var td = event.target.parentNode;
var tr = td.parentNode;
tr.parentNode.removeChild(tr);
}
My HTML code is below:
<button onclick=addRow()>Add row</button>
<br>
<table id="myTable">
<thead>
<th>1st dropdown</th>
<th>2nd dropdown</th>
<th>Remove</th>
</thead>
<tbody>
<!--Rows will be added/deleted dynamically-->
</tbody>
</table>
I will need to update dropdowns' IDs later when rows are deleted.
I was hoping to do it the same way: table.tBodies[0].rows[i].cells[0].id = "firstDropdown" + (i+1); but I am not sure if this is even going to work now.
