Checks for namespacing classes.

README.md

Just copy the namespaces.js and past it in the console for the site you're checking and it will log out any namespaces that are used.

namespaces.js

;(() => {
      const $ = (selector) => [].slice.call(document.querySelectorAll(selector))
      const classes = $('[class]')
        .reduce((prev, next) => {
          let _class = next.className 
          if (typeof _class !== 'string') {
            _class = _class.baseVal
          }
          return prev.concat(_class.split(' '))
        }, []) // combine all the classes together
      const ids = $('[id]').map((item) => item.id)
      const namespaces = [].concat(classes, ids)
        .filter((name, i, array) => !!name && array.indexOf(name, i + 1) < 0)
        .sort() // makes the output consistent
        .reduce((prev, next) => {
          let namespace = (next + '').match(/^#?(js|has|is|[a-z])(?:-|[A-Z])+/) || [ '', 'nonamespace' ]
          namespace = namespace[1].replace('-', '')
          if (!prev[namespace]) prev[namespace] = []
          prev[namespace].push(next)
          return prev
        }, {})
      // moves the nonamespaces to the bottom
      if (namespaces.nonamespace) {
        const nonamespace = namespaces.nonamespace
        delete namespaces.nonamespace
        namespaces.nonamespace = nonamespace
      }
      
      for (let namespace in namespaces) {
        console.group(`namespace: ${namespace}`)
        console.dir(namespaces[namespace])
        console.groupEnd()
      }
    })();

namespaces.min.js

!function(){var e=function(e){return[].slice.call(document.querySelectorAll(e))},n=e("[class]").reduce(function(e,n){var a=n.className;return"string"!=typeof a&&(a=a.baseVal),e.concat(a.split(" "))},[]),a=e("[id]").map(function(e){return e.id}),c=[].concat(n,a).filter(function(e,n,a){return!!e&&a.indexOf(e,n+1)<0}).sort().reduce(function(e,n){var a=(n+"").match(/^#?(js|has|is|[a-z])(?:-|[A-Z])+/)||["","nonamespace"];return a=a[1].replace("-",""),e[a]||(e[a]=[]),e[a].push(n),e},{});if(c.nonamespace){var r=c.nonamespace;delete c.nonamespace,c.nonamespace=r}for(var o in c)console.group("namespace: "+o),console.dir(c[o]),console.groupEnd()}();