# All files / helpers buffer-to-base64-url-safe.ts

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     /**
     * @license
     * Copyright 2019 Google Inc.
     *
     * Licensed 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 function bufferToBase64UrlSafe(
      buffer: ArrayBuffer | Uint8Array
    ): string {
      const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
      const b64 = btoa(String.fromCharCode(...array));
      return b64.replace(/\+/g, '-').replace(/\//g, '_');
    }