Refactor routing in App component to enhance navigation and improve error handling by integrating dynamic routes and updating the NotFound route.

node_modules/mimic-function/index.js

@@ -0,0 +1,72 @@
+const copyProperty = (to, from, property, ignoreNonConfigurable) => {
+	// `Function#length` should reflect the parameters of `to` not `from` since we keep its body.
+	// `Function#prototype` is non-writable and non-configurable so can never be modified.
+	if (property === 'length' || property === 'prototype') {
+		return;
+	}
+
+	// `Function#arguments` and `Function#caller` should not be copied. They were reported to be present in `Reflect.ownKeys` for some devices in React Native (#41), so we explicitly ignore them here.
+	if (property === 'arguments' || property === 'caller') {
+		return;
+	}
+
+	const toDescriptor = Object.getOwnPropertyDescriptor(to, property);
+	const fromDescriptor = Object.getOwnPropertyDescriptor(from, property);
+
+	if (!canCopyProperty(toDescriptor, fromDescriptor) && ignoreNonConfigurable) {
+		return;
+	}
+
+	Object.defineProperty(to, property, fromDescriptor);
+};
+
+// `Object.defineProperty()` throws if the property exists, is not configurable and either:
+// - one its descriptors is changed
+// - it is non-writable and its value is changed
+const canCopyProperty = function (toDescriptor, fromDescriptor) {
+	return toDescriptor === undefined || toDescriptor.configurable || (
+		toDescriptor.writable === fromDescriptor.writable
+		&& toDescriptor.enumerable === fromDescriptor.enumerable
+		&& toDescriptor.configurable === fromDescriptor.configurable
+		&& (toDescriptor.writable || toDescriptor.value === fromDescriptor.value)
+	);
+};
+
+const changePrototype = (to, from) => {
+	const fromPrototype = Object.getPrototypeOf(from);
+	if (fromPrototype === Object.getPrototypeOf(to)) {
+		return;
+	}
+
+	Object.setPrototypeOf(to, fromPrototype);
+};
+
+const wrappedToString = (withName, fromBody) => `/* Wrapped ${withName}*/\n${fromBody}`;
+
+const toStringDescriptor = Object.getOwnPropertyDescriptor(Function.prototype, 'toString');
+const toStringName = Object.getOwnPropertyDescriptor(Function.prototype.toString, 'name');
+
+// We call `from.toString()` early (not lazily) to ensure `from` can be garbage collected.
+// We use `bind()` instead of a closure for the same reason.
+// Calling `from.toString()` early also allows caching it in case `to.toString()` is called several times.
+const changeToString = (to, from, name) => {
+	const withName = name === '' ? '' : `with ${name.trim()}() `;
+	const newToString = wrappedToString.bind(null, withName, from.toString());
+	// Ensure `to.toString.toString` is non-enumerable and has the same `same`
+	Object.defineProperty(newToString, 'name', toStringName);
+	const {writable, enumerable, configurable} = toStringDescriptor; // We destructue to avoid a potential `get` descriptor.
+	Object.defineProperty(to, 'toString', {value: newToString, writable, enumerable, configurable});
+};
+
+export default function mimicFunction(to, from, {ignoreNonConfigurable = false} = {}) {
+	const {name} = to;
+
+	for (const property of Reflect.ownKeys(from)) {
+		copyProperty(to, from, property, ignoreNonConfigurable);
+	}
+
+	changePrototype(to, from);
+	changeToString(to, from, name);
+
+	return to;
+}