如何通过在col元素中声明事件来影响表的单元格?

好问题。

The spec 说:

<!ATTLIST COL                          -- column groups and properties --
  %attrs;                              -- %coreattrs, %i18n, %events ---

哪里 %events says :

<!ENTITY % events
 "onclick     %Script;       #IMPLIED  -- a pointer button was clicked --
  ondblclick  %Script;       #IMPLIED  -- a pointer button was double clicked--
  onmousedown %Script;       #IMPLIED  -- a pointer button was pressed down --
  onmouseup   %Script;       #IMPLIED  -- a pointer button was released --
  onmouseover %Script;       #IMPLIED  -- a pointer was moved onto --
  onmousemove %Script;       #IMPLIED  -- a pointer was moved within --
  onmouseout  %Script;       #IMPLIED  -- a pointer was moved away --
  onkeypress  %Script;       #IMPLIED  -- a key was pressed and released --
  onkeydown   %Script;       #IMPLIED  -- a key was pressed down --
  onkeyup     %Script;       #IMPLIED  -- a key was released --"
  >

所以是的,似乎事件是 想象上的 支持 td S.

然而,“应该”与“应该”相差甚远。唯一的方法是在所有的浏览器中进行测试,并希望它也能在未来的浏览器中工作。

再想一想,就用 event delegation 与父级绑定一次 table 相反。这将在现在和将来更加有效。