3 ms·

Another problem with IDs is that they make the "point system" in selectors much more complicated than if you only use classes and elements.

• carterdea 16y ago
  What about an ID for main page elements and things that never will change like #header or #footer or #sidebar?
  • jarin 16y ago
    Ideally for those you would use the html5 header, footer, and aside tags, respectively. You can use the html5 Javascript shim to enable support for those tags in IE.
    • job45 16y ago
      sidebar is not equal aside, and you can have several headers footers on one page.