Style Guidelines

We use fairly standard code style, with a few changes.

Spacing:

Indentation should be two spaces, no tabs.
No trailing whitespace at end of lines.

JavaScript

Based on Eslint recommended style.

Use single quotes unless to avoid needing escaping characters.
Use semi colons at the end of lines.
See eslint config for more.

CSS

Generally follow 18F CSS style, but we don't currently use Sass.
Use hyphen-separation rather than CamelCase.
Indentation increases with specificity, for example:

.material-radio {
  ...
}
  .material-radio .btn {
    ...
  }

but as mentioned in the 18F guides, try to keep specificity low.

HTML

Use double quotes around element attribute values (<element attribute="values">)
Two space indents.