Baseline Widely available
The rows read-only property of the HTMLTableSectionElement interface returns a live HTMLCollection containing the rows in the section. The HTMLCollection is live and is automatically updated when rows are added or removed.
A live HTMLCollection of HTMLTableRowElement objects.
In this example, two buttons allow you to add and remove rows from the table body section; it also updates a <output> element with the number of rows currently in the table.
<table>
<thead>
<th>Col 1</th>
<th>Col 2</th>
<th>Col 3</th>
</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>
table {
border-collapse: collapse;
}
th,
td {
border: 1px solid black;
}
button {
margin: 1em 1em 1em 0;
}
// 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();
});
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