vega-parser/src/parsers/marks/definition.js

Parse Vega specifications to runtime dataflows.

import role from './role.js';

export default function(spec) {
  return {
    marktype:     spec.type,
    name:         spec.name || undefined,
    role:         spec.role || role(spec),
    zindex:       +spec.zindex || undefined,
    aria:         spec.aria,
    description:  spec.description
  };
}