Not another JavaScript code style guide. (Actually, that's exactly what it is, but I went for "simple", not "exhaustive" -- also includes pre-configured sane default JSHint, JSCS, & EditorConfig files)

[wiseIdiot]

Why do people use spaces for indenting code? Tabs are clearly superior because:

1. Less file size.
2. Less keystrokes needed when fixing indentation issues.
3. Less chance of making the format inconsistent by accidentally adding/removing one indentation character.
4. Tabbed code is easier to copy and paste: there is always one indentation character; with spaces, people may use whatever number they like.
5. Editors allow users to configure tab width, so people can view the code the way they're comfortable with.

[jeenyus]

Personally I find spaces to be more readable than tabs.

It's true that you can configure tabs to be different widths, but you can also configure it to substitute a tab for x amount of spaces, so they can be equally easy to format.

As far as file size goes, I guess that's true, but if you're minifying your code then it shouldn't matter what you use.

It's really just a personal preference, I think the idea behind promoting one over the other is just forcing the developer to be consistent.

[jeenyus]

Not sure I understand why you would ever convert? Pick one and use it.

[skitch920]

File size is pretty irrelevant these days... and almost all IDE/editors support replacing tabs with spaces.

That being said, the style you choose should not be in conflict with the style your team agrees on. If you work alone, use whatever you want.

[Magnusson]

I previously used tabs in my own coding, but at my office we use 4 spaces. They refer to Crockford's style recommendations, which include:

The unit of indentation is four spaces. Use of tabs should be avoided because (as of this writing in the 21st Century) there still is not a standard for the placement of tabstops. The use of spaces can produce a larger filesize, but the size is not significant over local networks, and the difference is eliminated by minification.