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utils/shallowCopy.js

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+/**
+ * Shallow copy any JS value if it makes sense.
+ * @param {*} value
+ * @returns {*}
+ */
+export default function shallowCopy(value) {
+    if (value === null || typeof value !== "object") {
+        // primitives, functions, symbols
+        return value;
+    }
+
+    if (Array.isArray(value)) {
+        return value.slice();
+    }
+
+    if (value instanceof Date) {
+        return new Date(value.getTime());
+    }
+
+    if (value instanceof Map) {
+        return new Map(value);
+    }
+
+    if (value instanceof Set) {
+        return new Set(value);
+    }
+
+    // Plain objects
+    if (Object.getPrototypeOf(value) === Object.prototype) {
+        return Object.assign({}, value);
+    }
+
+    if (typeof value?.clone === "function") {
+        return value.clone();
+    }
+
+    // Fallback: clone prototype + own props
+    return Object.create(
+        Object.getPrototypeOf(value), //
+        Object.getOwnPropertyDescriptors(value),
+    );
+}