botbuilder-core/src/internal.ts

Core components for Microsoft Bot Builder. Components in this library can run either in a browser or on the server.

/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */

/**
 * @private
 */
export function shallowCopy<T>(value: T): T {
    if (Array.isArray(value)) {
        return value.slice(0) as any;
    }
    if (typeof value === 'object') {
        return { ...(value as any) };
    }

    return value;
}

/**
 * @private
 * @param target a thing that will be made revocable
 * @param handler an object that defines the way the new revocable object works
 */
export function makeRevocable<T extends Record<string, any>>(
    target: T,
    handler?: ProxyHandler<T>,
): { proxy: T; revoke(): void } {
    // Ensure proxy supported (some browsers don't)
    if (typeof Proxy !== 'undefined' && Proxy.revocable) {
        return Proxy.revocable(target, handler || {});
    } else {
        return {
            proxy: target,
            revoke: (): void => {
                // noop
            },
        };
    }
}