@theia/core/src/browser/style/progress-bar.css

/********************************************************************************
 * Copyright (C) 2019 TypeFox and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the Eclipse
 * Public License v. 2.0 are satisfied: GNU General Public License, version 2
 * with the GNU Classpath Exception which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 ********************************************************************************/

.theia-progress-bar-container {
    width: 100%;
    height: 2px;
}

.theia-progress-bar {
    background-color: var(--theia-progressBar-background);
    height: 2px;
    width: 3%;
    animation: progress-animation 1.3s 0s infinite cubic-bezier(0.645, 0.045, 0.355, 1);
}

@keyframes progress-animation {
    0% {
        margin-left: 0%;
        width: 3%;
    }
    60% {
        margin-left: 45%;
        width: 20%;
    }
    100% {
        margin-left: 99%;
        width: 1%;
    }
}