src/theme/TOC/styles.module.css

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

.tableOfContents {
  max-height: calc(100vh - (var(--ifm-navbar-height) + 2rem));
  overflow-y: auto;
  position: sticky;
  top: calc(var(--ifm-navbar-height) + 1rem);
  display: none;
}

@media (min-width: 997px) {
  .tableOfContents {
    display: block;
  }
}