Function runWithPriority

docs/index.js:4301–4308

(priority, fn)

  return void 0 === updatePriority ? 32 : getEventPriority(updatePriority.type);
}
function runWithPriority(priority, fn) {
  var previousPriority = ReactDOMSharedInternals.p;
  try {
    return (ReactDOMSharedInternals.p = priority), fn();
  } finally {
    ReactDOMSharedInternals.p = previousPriority;
  }
}
var randomKey = Math.random().toString(36).slice(2),
  internalInstanceKey = "__reactFiber$" + randomKey,
  internalPropsKey = "__reactProps$" + randomKey,