jointjs/docs/src/joint/api/dia/attributes/refX2.html

JavaScript diagramming library

<p>Same as <code>refX</code>. Useful when one needs to position an element absolutely and relatively at the same time.</p>

<pre><code>{ refX: '50%', refX2: 20 } // moves the element by 50% of the referenced width plus extra 20 pixels.</code></pre>