@angular-devkit/core/src/utils/object.js

Angular DevKit - Core Utility Library

"use strict";
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.deepCopy = deepCopy;
const copySymbol = Symbol();
function deepCopy(value) {
    if (Array.isArray(value)) {
        return value.map((o) => deepCopy(o));
    }
    else if (value && typeof value === 'object') {
        const valueCasted = value;
        if (valueCasted[copySymbol]) {
            // This is a circular dependency. Just return the cloned value.
            return valueCasted[copySymbol];
        }
        if (valueCasted['toJSON']) {
            return JSON.parse(valueCasted['toJSON']());
        }
        const copy = Object.create(Object.getPrototypeOf(valueCasted));
        valueCasted[copySymbol] = copy;
        for (const key of Object.getOwnPropertyNames(valueCasted)) {
            copy[key] = deepCopy(valueCasted[key]);
        }
        delete valueCasted[copySymbol];
        return copy;
    }
    else {
        return value;
    }
}