ui/src/components/InitialLoadingPlaceholder/index.scss

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

// Same as spin in `public/index.html`

@keyframes _initial-loading-spin {
  to {
    transform: rotate(360deg);
  }
}

.InitialLoadingPlaceholder {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: white;
  z-index: 9999;

  &-spinnerContainer {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  &-spinner {
    box-sizing: border-box;
    display: inline-block;
    width: 2rem;
    height: 2rem;
    vertical-align: -0.125em;
    border: 0.25rem solid currentColor;
    border-right-color: transparent;
    color: rgba(108, 117, 125, 0.75);
    border-radius: 50%;
    animation: 0.75s linear infinite _initial-loading-spin;
  }
}