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diff --git a/node_modules/workbox-cacheable-response/Plugin.mjs b/node_modules/workbox-cacheable-response/Plugin.mjs
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+/*
+ Copyright 2016 Google Inc. All Rights Reserved.
+ 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.
+*/
+
+import {CacheableResponse} from './CacheableResponse.mjs';
+import './_version.mjs';
+
+/**
+ * A class implementing the `cacheWillUpdate` lifecycle callback. This makes it
+ * easier to add in cacheability checks to requests made via Workbox's built-in
+ * strategies.
+ *
+ * @memberof workbox.cacheableResponse
+ */
+class Plugin {
+  /**
+   * To construct a new cacheable response Plugin instance you must provide at
+   * least one of the `config` properties.
+   *
+   * If both `statuses` and `headers` are specified, then both conditions must
+   * be met for the `Response` to be considered cacheable.
+   *
+   * @param {Object} config
+   * @param {Array<number>} [config.statuses] One or more status codes that a
+   * `Response` can have and be considered cacheable.
+   * @param {Object<string,string>} [config.headers] A mapping of header names
+   * and expected values that a `Response` can have and be considered cacheable.
+   * If multiple headers are provided, only one needs to be present.
+   */
+  constructor(config) {
+    this._cacheableResponse = new CacheableResponse(config);
+  }
+
+  /**
+   * @param {Object} options
+   * @param {Response} options.response
+   * @return {boolean}
+   * @private
+   */
+  cacheWillUpdate({response}) {
+    if (this._cacheableResponse.isResponseCacheable(response)) {
+      return response;
+    }
+    return null;
+  }
+}
+
+export {Plugin};