insertRow-tfoot-before-tbody.html

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This WPT test may be referenced by the following Test IDs:
- /html/semantics/tabular-data/the-table-element/insertRow-tfoot-before-tbody.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>insertRow(): table with a tfoot</title>

<link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me">

<link rel="help" href="https://html.spec.whatwg.org/multipage/#dom-table-insertrow">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<table>

  <thead><tr><th>Header</th></tr></thead>

  <tfoot><tr id="last-tr"><td>Footer</td></tr></tfoot>

  <tbody><tr><td>Body</td></tr></tbody>

</table>

<script>

"use strict";

test(() => {

  const table = document.querySelector("table");

  const lastTR = document.querySelector("#last-tr");

  assert_equals(table.rows[table.rows.length - 1], lastTR);

  const tr = table.insertRow(-1);

  assert_equals(tr.parentNode, table.tFoot);

  assert_equals(tr.previousElementSibling, lastTR);

}, "insertRow(-1) should put the element in the tfoot, if it exists (i.e. the parent of the last tr in rows)");

</script>