substance/model/_getContainerRoot.js

Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and web-based publishing system. It is developed to power our online editing platform [Substance](http://substance.io).

export default function getContainerRoot (doc, containerPath, nodeId) {
  let current = doc.get(nodeId)
  const containerId = containerPath[0]
  while (current) {
    const parent = current.getParent()
    if (parent && parent.id === containerId) {
      return current
    }
    current = parent
  }
}