modules/frontend/app/modules/loading/loading.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.
 */

[ignite-loading] {
    position: relative;
}

.loading {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    top: 0;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    background-color: white;
    transition: opacity 0.5s linear;
}

.loading-active {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s linear;
}

.loading:before {
    content: '';
    display: inline-block;
    height: 100%;
    vertical-align: middle;
}

.loading .loading-wrapper {
    display: inline-block;
    vertical-align: middle;
    position: relative;
    width: 100%;
}

.loading.loading-top .loading-wrapper {
    position: absolute;
    top: 100px;
    display: block;
}

.loading .loading-text {
    font-size: 18px;
    margin: 20px 0;
    text-align: center;
}

.loading-opacity-80 {
    opacity: 0.8;
}

.loading-max-foreground {
    z-index: 99999;
}