5

A tabified file showing spaces and tabs

This is what javascript-mode generates with standard tabbing (I never hit the space key when making it). I'd like to have the files contain no tab characters. I can't seem to find any option in the Easy Customization mode.

7

The buffer-local indent-tabs-mode variable controls this (in general, for any mode).

Note that javascript-mode is an alias for js-mode, so there isn't a javascript-mode-hook.

(defun my-js-mode-hook ()
  "Custom `js-mode' behaviours."
  (setq indent-tabs-mode nil))

(add-hook 'js-mode-hook 'my-js-mode-hook)

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