@lit/reactive-element/node/development/decorators/base.js

A simple low level base class for creating fast, lightweight web components

/**
 * @license
 * Copyright 2017 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
/**
 * Wraps up a few best practices when returning a property descriptor from a
 * decorator.
 *
 * Marks the defined property as configurable, and enumerable, and handles
 * the case where we have a busted Reflect.decorate zombiefill (e.g. in Angular
 * apps).
 *
 * @internal
 */
const desc = (obj, name, descriptor) => {
    // For backwards compatibility, we keep them configurable and enumerable.
    descriptor.configurable = true;
    descriptor.enumerable = true;
    if (
    // We check for Reflect.decorate each time, in case the zombiefill
    // is applied via lazy loading some Angular code.
    Reflect.decorate &&
        typeof name !== 'object') {
        // If we're called as a legacy decorator, and Reflect.decorate is present
        // then we have no guarantees that the returned descriptor will be
        // defined on the class, so we must apply it directly ourselves.
        Object.defineProperty(obj, name, descriptor);
    }
    return descriptor;
};

export { desc };
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