29015 2015-08-02 17:05:38 +0000 HTMLTableSectionElement.deleteRow(-1) should delete last row 2015-08-28 15:02:02 +0000 1 1 1 Unclassified WHATWG HTML unspecified PC All RESOLVED FIXED P2 normal Unsorted 1 dzbarsky ian annevk mike contributor oldest_to_newest 122366 0 dzbarsky 2015-08-02 17:05:38 +0000 -1 should map to rows.length, like it does for insertRow. I checked that Chrome, Firefox and Safari do so for the following testcase: <table> <tbody id="testBody"> <tr><td>ABCDEF</td></tr> <tr><td>12345</td></tr> <tr><td>ABC12345DEF</td></tr> </tbody> </table> <script> var tbody = document.getElementById("testBody"); tbody.deleteRow(-1); </script> 122855 1 annevk 2015-08-28 15:02:02 +0000 Thank you, fixed: https://github.com/whatwg/html/commit/558ab404df04ea49fde606f93a44b3f5cc45e510