HTMLTableSectionElement: insertRow() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The insertRow() method of the HTMLTableSectionElement interface creates a <tr> element, inserts it at the specified position in the given table sectioning element (<thead>, <tfoot>, or <tbody>), and returns it.
This method creates and inserts the element directly, without requiring separate calls to methods such as Document.createElement(), Node.insertBefore(), and Node.appendChild().
Syntax
insertRow()
insertRow(index)
Parameters
indexOptional-
The index of the new row in the
rowscollection. Ifindexis-1or equal to the number of rows, the row is appended as the last row. Ifindexis omitted, it defaults to-1.
Return value
An HTMLTableRowElement that references the new row.
Exceptions
IndexSizeErrorDOMException-
Thrown if
indexis greater than the number of rows or smaller than-1.
Examples
In this example, two buttons allow you to add and remove rows from the table body section; it also updates an <output> element with the number of rows currently in the table.
HTML
<table>
<thead>
<tr>
<th>Col 1</th>
<th>Col 2</th>
<th>Col 3</th>
</tr>
</thead>
<tbody>
<tr>
<td>X</td>
<td>Y</td>
<td>Z</td>
</tr>
</tbody>
</table>
<button id="add">Add a row</button>
<button id="remove">Remove last row</button>
<div>This table's body has <output>1</output> row(s).</div>
JavaScript
// Obtain relevant interface elements
const bodySection = document.querySelectorAll("tbody")[0];
const rows = bodySection.rows; // The collection is live, therefore always up-to-date
const rowNumberDisplay = document.querySelectorAll("output")[0];
const addButton = document.getElementById("add");
const removeButton = document.getElementById("remove");
function updateRowNumber() {
rowNumberDisplay.textContent = rows.length;
}
addButton.addEventListener("click", () => {
// Add a new row at the end of the body
const newRow = bodySection.insertRow();
// Add cells inside the new row
["A", "B", "C"].forEach(
(elt) => (newRow.insertCell().textContent = `${elt}${rows.length}`),
);
// Update the row counter
updateRowNumber();
});
removeButton.addEventListener("click", () => {
// Delete the row from the body
bodySection.deleteRow(-1);
// Update the row counter
updateRowNumber();
});
Result
Specifications
| Specification |
|---|
| HTML # dom-tbody-insertrow |