With the default HTML mode as of Emacs 24.4, you can get the same behavior as Sublime Text (automatic insertion of the closing tag if you type
</) by putting the following line in your init file:
(setq sgml-quick-keys 'close)
Out of the box, pressing
C-c / or
C-c C-e or
C-c / inserts a closing tag (the whole
You can find out about these keys by typing
C-h m while editing an HTML file. This displays the list of mode-specific key bindings. Look for something relevant there — the keys are bound to a command called
sgml-close-tag. The binding
C-c / is also mentioned in the manual.
Finding out about the
</ behavior is harder: it's missing both from the manual and from the self-documentation. Pressing
C-h k / tells you that
/ is bound to
sgml-slash, and that it “behaves electrically” (that's Emacs-speak for “it inserts some stuff automatically”) when
sgml-quick-keys is non-nil, but to find out about
close you need to look at the source code.
Note that there are other HTML modes for Emacs and they may do things completely differently.