Function assertDocumentAttachment

packages/yjs-transform/src/yjs.ts:3–9

(
  sharedType: T,
)

import * as Y from 'yjs'

export function assertDocumentAttachment<T extends Y.AbstractType<any>>(
  sharedType: T,
): asserts sharedType is T & { doc: NonNullable<T['doc']> } {
  if (!sharedType.doc) {
    throw new Error("shared type isn't attached to a document")
  }
}