• selector : (IE7) https://caniuse.com/#search=sibling

  • selector : (IE7)

  • https://developer.mozilla.org/en-US/docs/Web/CSS/Child_combinator
  • :before, :after (IE8) https://mytory.net/archives/10060
  • display:table-*, inline-table (IE8) https://caniuse.com/#search=table
  • websocket (IE10) https://caniuse.com/#search=websocket