Method create

src/cdk/observers/observe-content.ts:60–62

(callback: MutationCallback)

@Service()
export class MutationObserverFactory {
  create(callback: MutationCallback): MutationObserver | null {
    return typeof MutationObserver === 'undefined' ? null : new MutationObserver(callback);
  }
}

/** An injectable service that allows watching elements for changes to their content. */