JavaScript to get rows count of a HTML table
JavascriptHtmlJavascript Problem Overview
How to get with JavaScript the rows count of a HTML table having id and name?
Javascript Solutions
Solution 1 - Javascript
Given a
<table id="tableId">
<thead>
<tr><th>Header</th></tr>
</thead>
<tbody>
<tr><td>Row 1</td></tr>
<tr><td>Row 2</td></tr>
<tr><td>Row 3</td></tr>
</tbody>
<tfoot>
<tr><td>Footer</td></tr>
</tfoot>
</table>
and a
var table = document.getElementById("tableId");
there are two ways to count the rows:
var totalRowCount = table.rows.length; // 5
var tbodyRowCount = table.tBodies[0].rows.length; // 3
The table.rows.length returns the amount of ALL <tr> elements within the table. So for the above table it will return 5 while most people would really expect 3. The table.tBodies returns an array of all <tbody> elements of which we grab only the first one (our table has only one). When we count the rows on it, then we get the expected value of 3.
Solution 2 - Javascript
You can use the .rows property and check it's .length, like this:
var rowCount = document.getElementById('myTableID').rows.length;
Solution 3 - Javascript
$('tableName').find('tr').length
Solution 4 - Javascript
If the table has an ID:
const tableObject = document.getElementById(tableId);
const rowCount = tableObject[1].childElementCount;
If the table has a Class:
const tableObject = document.getElementsByClassName(tableClass);
const rowCount = tableObject[1].childElementCount;
If the table has a Name:
const tableObject = document.getElementsByTagName('table');
const rowCount = tableObject[1].childElementCount;
Note: index 1 represents <tbody> tag
Solution 5 - Javascript
This is another option, using jQuery and getting only tbody rows (with the data) and desconsidering thead/tfoot.
> $("#tableId > tbody > tr").length
console.log($("#myTableId > tbody > tr").length);
.demo {
width:100%;
height:100%;
border:1px solid #C0C0C0;
border-collapse:collapse;
border-spacing:2px;
padding:5px;
}
.demo caption {
caption-side:top;
text-align:center;
}
.demo th {
border:1px solid #C0C0C0;
padding:5px;
background:#F0F0F0;
}
.demo td {
border:1px solid #C0C0C0;
text-align:left;
padding:5px;
background:#FFFFFF;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<table id="myTableId" class="demo">
<caption>Table 1</caption>
<thead>
<tr>
<th>Header 1</th>
<th>Header 2</th>
<th>Header 3</th>
<th>Header 4</th>
</tr>
</thead>
<tbody>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</tbody>
<tfoot>
<tr>
<td colspan=4 style="background:#F0F0F0"> </td>
</tr>
</tfoot>
</table>