Function lockStreamHeight

src/hold-stream.ts:30–49

(
  el: HTMLElement,
  streaming: boolean,
  options?: { domUpdated?: boolean },
)

 * inner overflow (e.g. max-height grids) cannot trap page scroll.
 */
export function lockStreamHeight(
  el: HTMLElement,
  streaming: boolean,
  options?: { domUpdated?: boolean },
): void {
  if (!streaming) {
    el.style.minHeight = "";
    return;
  }

  const domUpdated = options?.domUpdated !== false;
  const h = el.offsetHeight;
  const prev = Number.parseFloat(el.style.minHeight) || 0;

  if (h > prev) {
    el.style.minHeight = `${h}px`;
  } else if (domUpdated && h < prev) {
    el.style.minHeight = h > 0 ? `${h}px` : "";
  }
}

/** Clear height lock when streaming finishes */
export function unlockStreamHeight(el: HTMLElement): void {