: Learning GNU Emacs, 3rd Edition Starting HTML helper mode Starting HTML helper mode

Before you can start HTML helper mode, you have to load it into Emacs. (For a complete discussion of this topic, see "Building Your Own Lisp Library" in Chapter 11; we describe it briefly here.) Begin by typing M-x load-file Enter. Emacs asks which file to load and you enter ~/elisp/html-helper-mode.el and press Enter, adjusting the path to reflect the location where you installed html-helper-mode.el. You enter the mode by typing M-x html-helper-mode Enter. HTML helper appears on the mode line.

Making HTML helper mode part of your startup is easier. Put the following lines in your .emacs file:

(setq load-path (cons "~/elisp " load-path))
(autoload 'html-helper-mode "html-helper-mode" "Yay HTML" t)

In the first line, insert the complete path for the directory in which html-helper-mode.el is located in quotation marks, replacing ~/elisp to the correct value for your system. The second line tells Emacs to load HTML helper mode automatically when you start Emacs.

If you want to use HTML helper mode for editing HTML files by default, add this line to .emacs as well:

(setq auto-mode-alist (cons '(".html?$" . html-helper-mode) auto-mode-alist))

If you edit other types of files with HTML helper mode, you may want to add lines to include all the types of files you edit. Adding more lines is the easiest way. For example, to make HTML helper mode the default for PHP files, add this line to .emacs:

(setq auto-mode-alist (cons '(".php$" . html-helper-mode) auto-mode-alist))

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