Name: prettier-emacs
Owner: Prettier
Description: Minor mode to format JS code on file save
Created: 2017-05-29 15:56:34.0
Updated: 2018-01-15 12:33:21.0
Pushed: 2018-01-09 07:26:07.0
Homepage: http://jlongster.com/A-Prettier-Formatter
Size: 22
Language: Emacs Lisp
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prettier-js is a function that formats the current buffer using prettier. The
package also exports a minor mode that applies (prettier-js) on save.
Ensure that the prettier program is installed:
h prettier
If prettier is not installed already, you can install prettier using npm -g prettier or via your package manager.
First require the package:
uire 'prettier-js)
Then you can hook to your favorite javascript mode:
-hook 'js2-mode-hook 'prettier-js-mode)
-hook 'web-mode-hook 'prettier-js-mode)
To adjust the CLI args used for the prettier command, you can customize the prettier-js-args variable:
q prettier-js-args '(
-trailing-comma" "all"
-bracket-spacing" "false"
Web-mode is a popular mode for editing .js and .jsx files, but it is used to edit other template files too. If you want to hook prettier-js to web-mode for .js and .jsx files only, you can define a helper function like this:
un enable-minor-mode (my-pair)
nable minor mode if filename match the regexp. MY-PAIR is a cons cell (regexp . minor-mode)."
f (buffer-file-name)
(if (string-match (car my-pair) buffer-file-name)
(funcall (cdr my-pair)))))
And then hook to web-mode like this:
-hook 'web-mode-hook #'(lambda ()
(enable-minor-mode
'("\\.jsx?\\'" . prettier-js-mode))))
This package is customizable via custom.el:
customize-group prettier-js
prettier-js-command is the prettier commandprettier-js-args are the args passed to the prettier commandprettier-js-show-errors customizes where to display the error output (buffer, echo or nil)prettier-js-width-mode customizes the width when formatting buffer contents (window, fill or nil)