如何在 emacs javascript 模式下更改缩进宽度
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How to change the indentation width in emacs javascript mode
提问by mksuth
I'd like to use 2 spaces for my indents instead of 4. I can change the default behavior of C mode using:
我想为缩进使用 2 个空格而不是 4 个。我可以使用以下方法更改 C 模式的默认行为：
(setq c-basic-offset 2)
How do I change this in javascript mode?
如何在 javascript 模式下更改此设置？
回答by Willi Ballenthin
js-indent-levelcan be used in the default javascript-mode, which is included by default starting in emacs 23.2.
js-indent-level可以在默认的 javascript-mode 中使用，默认情况下从 emacs 23.2 开始包含该模式。
(setq js-indent-level 2)
should do what you're looking for. If you're using an older version of emacs, you may be in java-mode. I think this mode responds to c-basic-offset, however I may be wrong.
应该做你正在寻找的。如果您使用的是较旧版本的 emacs，则您可能处于 java 模式。我认为这种模式会响应c-basic-offset，但是我可能是错的。
回答by wprl
I wish someone had told me about Custom a lot sooner! Perhaps this will help another mere mortal like me ;)
我希望有人早点告诉我自定义！也许这会帮助另一个像我这样的凡人;)
Invoke Custom:
调用自定义：
M-x customize
Then, choose "Programming," and then "Languages," and then select a language/mode to customize. Edit the options as you see fit. When done, choose either "Save for current session" or "Save for future sessions."
然后，选择“编程”，然后选择“语言”，然后选择要自定义的语言/模式。编辑您认为合适的选项。完成后，选择“保存当前会话”或“保存以备将来会话”。
回答by metakermit
回答by Tyler
You might also want to set emacs to use spaces instead of tabs
您可能还想将 emacs 设置为使用空格而不是制表符
(setq-default indent-tabs-mode nil)
回答by Helge
In my javascript.el file (/usr/share/emacs/site-lisp) I found
在我的 javascript.el 文件（/usr/share/emacs/site-lisp）中，我发现
javascript-indent-level 4
javascript 缩进级别 4
So if you are using the same lisp-mode you can change it by running
因此，如果您使用相同的 lisp 模式，则可以通过运行来更改它
(setq javascript-indent-level 2)
回答by kwarnke
You can also use
你也可以使用
M-x customize-variable
and type
并输入
js-indent-level
(js-[TAB] shows a list of options). Then change the Js Indent Levelas wanted and click [State:]and save.
（js-[TAB] 显示选项列表）。然后Js Indent Level根据需要更改并单击[State:]并保存。
回答by hs0ucy
Using EditorConfigcould be a good idea too. And of course, Emacs had a mode for it editorconfig-emacs.
使用EditorConfig也可能是一个好主意。当然，Emacs 有一个模式editorconfig-emacs。
It's also available in the package manager (M-x package-list-packages) through Melpa or Marmalade.
它也可以M-x package-list-packages通过 Melpa 或 Marmalade在包管理器 ( ) 中使用。
回答by MatthewD
If you want to change it on a per-file basis, put this at the top of your file:
如果您想在每个文件的基础上更改它，请将其放在文件的顶部：
// -*- mode: js; js-indent-level: 2; -*-
回答by Malvineous
None of these solutions worked for me after upgrading to Emacs 26 (I already had js-indent-levelset to 2 but my tab width went back to 8), but what did work was setting the tab-widthvariable to 2, which seems to replace the old default-tab-widthvariable.
升级到 Emacs 26 后，这些解决方案都不适合我（我已经js-indent-level设置为 2，但我的选项卡宽度又回到了 8），但是有效的是将tab-width变量设置为2，这似乎取代了旧default-tab-width变量。
I found this in M-x customizeby searching for tab width.
我M-x customize通过搜索找到了这个tab width。
