trElement

trElement refers to the table row element in HTML and the DOM. It is represented in the DOM by the HTMLTableRowElement interface and corresponds to the <tr> element in a document. A tr element lives inside a table section such as thead, tbody, or tfoot, though older markup permitted a row directly under a table. Each row contains cells, which are typically <td> or <th> elements.

Key properties and methods of a tr element include rowIndex and sectionRowIndex, which indicate the row’s position within the table and within its section, respectively. The tr element also exposes a live collection named cells that contains its HTMLTableCellElement children. Methods available on a row include insertCell(index) to add a new cell and deleteCell(index) to remove one. The element’s tagName is TR, and standard styling and behavior can be controlled via className, id, and style attributes. In HTML5, many attributes related to alignment and color (such as align and bgColor) are deprecated in favor of CSS.

Semantics and accessibility: the row itself carries no special meaning beyond its structural role; the meaning is conveyed by the cells it contains. Use th elements with proper scope to designate header cells, and group rows with thead, tbody, and tfoot to improve readability and accessibility.

Compatibility: HTMLTableRowElement is implemented across all major browsers and platforms, ensuring consistent manipulation of table rows in client-side scripts.

---