EditorConfig is awesome (http://editorconfig.org)

.editorconfig

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

root = true

[*]
charset = utf-8
end_of_line = lf
indent_style = tab
indent_size = tab
tab_width = 4
insert_final_newline = true
trim_trailing_whitespace = true

[.*{js,css,scss,json,vue,html}]
tab_width = 2

[*.md]
trim_trailing_whitespace = false