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currently I'm working a lot with json files. They tend to be a little bigger. I'm a little fed up with always marking the whole file and then typing M-x json-reformat-region.

Is there a way to do this directly on opening the file?

Regards

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I use this hook to achieve an effect like that:

;; pretty print json files when they're opened (add-to-list 'auto-mode-alist '("\\.json\\'" . (lambda () (javascript-mode) (json-pretty-print (point-min) (point-max)) (goto-char (point-min)) (set-buffer-modified-p nil))))

  • Hi I tried it but is not working. I even replaced json-pretty-print by json-reformat-region – daeda Jul 14 '17 at 19:50
  • Are you getting any errors? – DoMiNeLa10 Jul 14 '17 at 23:23
  • I don't get any errors, at least no obvious ones that I can see i the minibuffer. Is this for a different mode? I have json-mode and json-snatcher installed. I open the file and nothings happens... – daeda Jul 16 '17 at 14:49
  • In that case you might want to add a hook to json-mode that pretty prints the buffer. – DoMiNeLa10 Jul 16 '17 at 15:19
  • So I finally was able to do this. The problem was that I didn't know to which mode the command json-reformat-region belongs. So here is my adapted version. ;; pretty print json files when they're opened (add-to-list 'auto-mode-alist '("\\.json\\'" . (lambda () (json-mode) (json-reformat-region (point-min) (point-max)) (goto-char (point-min)) (set-buffer-modified-p nil)))) – daeda Jul 18 '17 at 20:43

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