Function isDocumentNode

packages/core/src/utils/is.ts:24–26

(node: any)

}

export const isDocumentNode = (node: any): node is Document => {
  return node.nodeType === Node.DOCUMENT_NODE
}

/**
 * 判断节点是否在 viewport 内，判断依据：只要节点有一部分在 viewport 内，都算 true，其余情况 false