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POeval-after-load vs. mode hook
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  1. POeval-after-load vs. mode hook
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    copied!<p>Is there a difference between setting things for a mode using <code>eval-after-load</code> and using the mode hook?</p> <p>I've seen some code where <code>define-key</code> is used inside a major mode hook, and some other code where <code>define-key</code> is used in <code>eval-after-load</code> form.</p> <hr> <p>Update:</p> <p>For better understanding, here is an example of using eval-after-load and mode hooks with org-mode. The code can run <strong>before</strong> <code>(load "org")</code> or <code>(require 'org)</code> or <code>(package-initialize)</code>.</p> <pre><code>;; The following two lines of code set some org-mode options. ;; Usually, these can be outside (eval-after-load ...) and work. ;; In cases that doesn't work, try using setq-default or set-variable ;; and putting them in (eval-after-load ...), if the ;; doc for the variables don't say what to do. ;; Or use Customize interface. (setq org-hide-leading-stars t) (setq org-return-follows-link t) ;; "org" because C-h f org-mode RET says that org-mode is defined in org.el (eval-after-load "org" '(progn ;; Establishing your own keybindings for org-mode. ;; Variable org-mode-map is available only after org.el or org.elc is loaded. (define-key org-mode-map (kbd "&lt;C-M-return&gt;") 'org-insert-heading-respect-content) (define-key org-mode-map (kbd "&lt;M-right&gt;") nil) ; erasing a keybinding. (define-key org-mode-map (kbd "&lt;M-left&gt;") nil) ; erasing a keybinding. (defun my-org-mode-hook () ;; The following two lines of code is run from the mode hook. ;; These are for buffer-specific things. ;; In this setup, you want to enable flyspell-mode ;; and run org-reveal for every org buffer. (flyspell-mode 1) (org-reveal)) (add-hook 'org-mode-hook 'my-org-mode-hook))) </code></pre>
 

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