I am using js2-mode to edit Javascript in Emacs, but I can't seem to get it to stop using tabs instead of spaces for indentation. My other modes work fine, just having issues w/ js2.
Do you have
(setq-default indent-tabs-mode nil)
in your .emacs? It works fine for me in emacs 23.0.60.1 when I do that. js2-mode uses the standard emacs function indent-to, which respects indent-tabs-mode, to do its indenting.
john_fries
Add this to your .emacs file somewhere after you load js2 mode:
(setq js2-mode-hook
'(lambda () (progn
(set-variable 'indent-tabs-mode nil))))
On my copy of GNU Emacs 24.2.1, setting:
(setq-default indent-tabs-mode nil)
in .emacs is not sufficient for javascript mode, presumably because the setting is somehow being over-ridden in a per-buffer context. The following change is sufficient:
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
'(indent-tabs-mode nil))
来源：https://stackoverflow.com/questions/45861/how-do-i-get-js2-mode-to-use-spaces-instead-of-tabs-in-emacs