first commit

node_modules/webpack-dev-middleware/dist/utils/memorize.js

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+"use strict";
+
+const cacheStore = new WeakMap();
+
+// eslint-disable-next-line jsdoc/no-restricted-syntax
+/**
+ * @template T
+ * @typedef {(...args: any) => T} FunctionReturning
+ */
+
+/**
+ * @template T
+ * @param {FunctionReturning<T>} fn memorized function
+ * @param {({ cache?: Map<string, { data: T }> } | undefined)=} cache cache
+ * @param {((value: T) => T)=} callback callback
+ * @returns {FunctionReturning<T>} new function
+ */
+function memorize(fn, {
+  cache = new Map()
+} = {}, callback = undefined) {
+  // eslint-disable-next-line jsdoc/no-restricted-syntax
+  /**
+   * @param {any} arguments_ args
+   * @returns {any} result
+   */
+  const memoized = (...arguments_) => {
+    const [key] = arguments_;
+    const cacheItem = cache.get(key);
+    if (cacheItem) {
+      return cacheItem.data;
+    }
+
+    // @ts-expect-error
+    let result = fn.apply(this, arguments_);
+    if (callback) {
+      result = callback(result);
+    }
+    cache.set(key, {
+      data: result
+    });
+    return result;
+  };
+  cacheStore.set(memoized, cache);
+  return memoized;
+}
+module.exports = memorize;