The HTMLTableElement.insertRow() method inserts a new row (<tr>) in a given <table>, and returns a reference to the new row.

If a table has multiple <tbody> elements, by default, the new row is inserted into the last <tbody>. To insert the row into a specific <tbody>:

let specific_tbody = document.getElementById(tbody_id);
let row = specific_tbody.insertRow(index)

 

Note: insertRow() inserts the row directly into the table. The row does not need to be appended separately as would be the case if Document.createElement() had been used to create the new <tr> element.

Syntax

var newRow = HTMLTableElement.insertRow(index);

HTMLTableElement is a reference to an HTML <table> element.

Parameters

index Optional
The row index of the new row. If index is -1 or equal to the number of rows, the row is appended as the last row. If index is greater than the number of rows, an IndexSizeError exception will result. If index is omitted it defaults to -1.

Return value

newRow is an HTMLTableRowElement that references the new row.

Example

This example uses insertRow(-1) to append a new row to a table.

We then use HTMLTableRowElement.insertCell() to insert a new cell in the new row. (To be valid HTML, a <tr> must have at least one <td> element.) Finally, we add some text to the cell using Document.createTextNode() and Node.appendChild().

HTML

<table id="my-table">
  <tr><td>Row 1</td></tr>
  <tr><td>Row 2</td></tr>
  <tr><td>Row 3</td></tr>
</table>

JavaScript

function addRow(tableID) {
  // Get a reference to the table
  let tableRef = document.getElementById(tableID);

  // Insert a row at the end of the table
  let newRow = tableRef.insertRow(-1);

  // Insert a cell in the row at index 0
  let newCell = newRow.insertCell(0);

  // Append a text node to the cell
  let newText = document.createTextNode('New bottom row');
  newCell.appendChild(newText);
}

// Call addRow() with the table's ID
addRow('my-table');

Result

Specifications

Specification Status Comment
HTML Living Standard
The definition of 'HTMLTableElement.insertRow()' in that specification.
Living Standard  
Document Object Model (DOM) Level 2 HTML Specification
The definition of 'HTMLTableElement.insertRow()' in that specification.
Obsolete Specifies in more detail where the row is inserted.
Document Object Model (DOM) Level 1 Specification
The definition of 'HTMLTableElement.insertRow()' in that specification.
Obsolete Initial definition

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 4Edge Full support YesFirefox Full support 3
Notes
Full support 3
Notes
Notes Starting with Firefox 20, the index argument has been made optional and defaults to -1 as per HTML specification.
IE Full support 5.5Opera Full support 10Safari Full support 4WebView Android Full support YesChrome Android ? Edge Mobile Full support YesFirefox Android Full support 4
Notes
Full support 4
Notes
Notes Starting with Firefox 20, the index argument has been made optional and defaults to -1 as per HTML specification.
Opera Android Full support YesSafari iOS Full support YesSamsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.

See also