Function mountId

dash/deps/react-dom@18.3.1.js:16579–16612

()

  }

  function mountId() {
    var hook = mountWorkInProgressHook();
    var root = getWorkInProgressRoot(); // TODO: In Fizz, id generation is specific to each server config. Maybe we
    // should do this in Fiber, too? Deferring this decision for now because
    // there's no other place to store the prefix except for an internal field on
    // the public createRoot object, which the fiber tree does not currently have
    // a reference to.

    var identifierPrefix = root.identifierPrefix;
    var id;

    if (getIsHydrating()) {
      var treeId = getTreeId(); // Use a captial R prefix for server-generated ids.

      id = ':' + identifierPrefix + 'R' + treeId; // Unless this is the first id at this level, append a number at the end
      // that represents the position of this useId hook among all the useId
      // hooks for this fiber.

      var localId = localIdCounter++;

      if (localId > 0) {
        id += 'H' + localId.toString(32);
      }

      id += ':';
    } else {
      // Use a lowercase r prefix for client-generated ids.
      var globalClientId = globalClientIdCounter++;
      id = ':' + identifierPrefix + 'r' + globalClientId.toString(32) + ':';
    }

    hook.memoizedState = id;
    return id;
  }

  function updateId() {
    var hook = updateWorkInProgressHook();