javascript/packages/core/lib/util.ts

/*
 * 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.
 */

export const isNodeEnv: boolean
  = typeof process !== "undefined"
  && process.versions != null
  && process.env.ECMA_ONLY !== "true"
  && process.versions.node != null;

export const hasBuffer = isNodeEnv && typeof Buffer !== "undefined";

export function isUint8Array(obj: any): obj is Uint8Array {
  return obj instanceof Uint8Array || Object.prototype.toString.call(obj) === "[object Uint8Array]";
}