Function transferData

src/cdk/drag-drop/dom/clone-node.ts:34–49

Matches elements between an element and its clone and allows for their data to be cloned.

(
  selector: string,
  node: HTMLElement,
  clone: HTMLElement,
  callback: (source: T, clone: T) => void,
)

/** Matches elements between an element and its clone and allows for their data to be cloned. */
function transferData<T extends Element>(
  selector: string,
  node: HTMLElement,
  clone: HTMLElement,
  callback: (source: T, clone: T) => void,
) {
  const descendantElements = node.querySelectorAll<T>(selector);

  if (descendantElements.length) {
    const cloneElements = clone.querySelectorAll<T>(selector);

    for (let i = 0; i < descendantElements.length; i++) {
      callback(descendantElements[i], cloneElements[i]);
    }
  }
}

// Counter for unique cloned radio button names.
let cloneUniqueId = 0;