Namespaced, hyphenated BEM covention regex for SCSS-Lint

gistfile1.yml

linters:

    SelectorFormat:
        convention: ^(_)?[a-z]+-[a-z0-9-]+((_{2}|-{2})?[a-z0-9-]+)?(-{2}[a-z0-9-]+)?[a-z0-9]$
        convention_explanation: 'should be written in namespaced, hyphenated BEM format'
        ignored_types: [element]

SCSS-Lint config for namespaced, hyphenated BEM format. The regex is taken from Harry Roberts' post More transparent UI code with namespaces. SCSS-Lint validates against the selector, so the period requirement has been removed from the regex.

The convention_explanation option requires v0.37.0 or greater.

Just to mention — this regex won't accept following selectors:

test
test-m