My base editor config file

.editorconfig

# EditorConfig is awesome: http://EditorConfig.org

# Howto with your editor: http://editorconfig.org/#download
# Sublime: https://github.com/sindresorhus/editorconfig-sublime

# top-most EditorConfig file
root = true

# Unix-style newlines with a newline ending every file
[**]
end_of_line = lf
insert_final_newline = true

# Standard at: https://github.com/felixge/node-style-guide
[**.js, **.json]
trim_trailing_whitespace = true
indent_style = space
indent_size = 4
quote_type = single
curly_bracket_next_line = false
spaces_around_operators = true
space_after_control_statements = true
space_after_anonymous_functions = true
spaces_in_brackets = false

# No Standard.  Please document a standard if different from .js
[**.yml, **.css]
trim_trailing_whitespace = true
indent_style = space
indent_size = 4

[**.html]
trim_trailing_whitespace = true
indent_style = space
indent_size = 4

# No standard.  Please document a standard if different from .js
[**.md]
indent_style = tab

# Standard at:
[Makefile]
indent_style = tab

# The indentation in package.json will always need to be 2 spaces
# https://github.com/npm/npm/issues/4718
[package.json, bower.json]
indent_style = space
indent_size = 4