gComponent.data error with single data

This code has an error:

<g-composer data="10"></g-composer>
<script>
  console.log(document.querySelector('g-composer').data);
</script>

In console is displayed:

composer.js:1  Uncaught TypeError: Cannot create proxy with a non-object as target or handler

The error is related to trying to create a JavaScript Proxy for something that is not an object. This typically happens when you're trying to use a Proxy on a primitive type, like a number or a string. In this case, the element might be trying to apply a Proxy to the value stored in the data attribute, which is a number, not an object. This issue is related with https://github.com/graphery/graphane/issues/4.

graphery / graphane

gComponent.data error with single data #5