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

Theia is a cloud & desktop IDE framework implemented in TypeScript.

/********************************************************************************
 * 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-only 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%;
  }
}