A generic font family should always be defined at the end of a `font-family` list. Because there is no guarantee that a specific font is installed on the computer or can be downloaded using a `@font-face` at-rule. The generic family lets the browser select an acceptable fallback font when needed.

## Noncompliant Code Example

    font-family: 'Arial', 'MS Trebuchet';

## Compliant Solution

    font-family: 'Arial', 'MS Trebuchet', sans-serif;

## Note

Obviously, this check does not apply to `font-family` descriptors in `@font-face` at-rules. For instance, the following piece of code does not raise any issue:

    @font-face {
      font-family: 'My font family';
      src: url('http://xxx');
    }

## See

- MDN font-family