SLint. Defines global variables available in
the browser.</p>
</li>
<li><p><code>devel</code> - JSLint and JSHint. Defines global variables that are only used in
a development environment (such as <code>alert</code> and <code>console</code>).</p>
</li>
<li><p><code>node</code> - JSLint, JSHint and ESLint. Defines global variables available in
Node.js.</p>
</li>
<li><p><code>couch</code> - JSLint and JSHint. Defines global variables available in CouchDB.</p>
</li>
<li><p><code>rhino</code> - JSLint and JSHin