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lib.es2015.proxy.d.ts129 linesDownload Raw Back to lib
1/*! *****************************************************************************2Copyright (c) Microsoft Corporation. All rights reserved.3Licensed under the Apache License, Version 2.0 (the "License"); you may not use4this file except in compliance with the License. You may obtain a copy of the5License at http://www.apache.org/licenses/LICENSE-2.06 7THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY8KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED9WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,10MERCHANTABLITY OR NON-INFRINGEMENT.11 12See the Apache Version 2.0 License for specific language governing permissions13and limitations under the License.14***************************************************************************** */15 16 17/// <reference no-default-lib="true"/>18 19interface ProxyHandler<T extends object> {20    /**21     * A trap method for a function call.22     * @param target The original callable object which is being proxied.23     */24    apply?(target: T, thisArg: any, argArray: any[]): any;25 26    /**27     * A trap for the `new` operator.28     * @param target The original object which is being proxied.29     * @param newTarget The constructor that was originally called.30     */31    construct?(target: T, argArray: any[], newTarget: Function): object;32 33    /**34     * A trap for `Object.defineProperty()`.35     * @param target The original object which is being proxied.36     * @returns A `Boolean` indicating whether or not the property has been defined.37     */38    defineProperty?(target: T, property: string | symbol, attributes: PropertyDescriptor): boolean;39 40    /**41     * A trap for the `delete` operator.42     * @param target The original object which is being proxied.43     * @param p The name or `Symbol` of the property to delete.44     * @returns A `Boolean` indicating whether or not the property was deleted.45     */46    deleteProperty?(target: T, p: string | symbol): boolean;47 48    /**49     * A trap for getting a property value.50     * @param target The original object which is being proxied.51     * @param p The name or `Symbol` of the property to get.52     * @param receiver The proxy or an object that inherits from the proxy.53     */54    get?(target: T, p: string | symbol, receiver: any): any;55 56    /**57     * A trap for `Object.getOwnPropertyDescriptor()`.58     * @param target The original object which is being proxied.59     * @param p The name of the property whose description should be retrieved.60     */61    getOwnPropertyDescriptor?(target: T, p: string | symbol): PropertyDescriptor | undefined;62 63    /**64     * A trap for the `[[GetPrototypeOf]]` internal method.65     * @param target The original object which is being proxied.66     */67    getPrototypeOf?(target: T): object | null;68 69    /**70     * A trap for the `in` operator.71     * @param target The original object which is being proxied.72     * @param p The name or `Symbol` of the property to check for existence.73     */74    has?(target: T, p: string | symbol): boolean;75 76    /**77     * A trap for `Object.isExtensible()`.78     * @param target The original object which is being proxied.79     */80    isExtensible?(target: T): boolean;81 82    /**83     * A trap for `Reflect.ownKeys()`.84     * @param target The original object which is being proxied.85     */86    ownKeys?(target: T): ArrayLike<string | symbol>;87 88    /**89     * A trap for `Object.preventExtensions()`.90     * @param target The original object which is being proxied.91     */92    preventExtensions?(target: T): boolean;93 94    /**95     * A trap for setting a property value.96     * @param target The original object which is being proxied.97     * @param p The name or `Symbol` of the property to set.98     * @param receiver The object to which the assignment was originally directed.99     * @returns A `Boolean` indicating whether or not the property was set.100     */101    set?(target: T, p: string | symbol, newValue: any, receiver: any): boolean;102 103    /**104     * A trap for `Object.setPrototypeOf()`.105     * @param target The original object which is being proxied.106     * @param newPrototype The object's new prototype or `null`.107     */108    setPrototypeOf?(target: T, v: object | null): boolean;109}110 111interface ProxyConstructor {112    /**113     * Creates a revocable Proxy object.114     * @param target A target object to wrap with Proxy.115     * @param handler An object whose properties define the behavior of Proxy when an operation is attempted on it.116     */117    revocable<T extends object>(target: T, handler: ProxyHandler<T>): { proxy: T; revoke: () => void; };118 119    /**120     * Creates a Proxy object. The Proxy object allows you to create an object that can be used in place of the121     * original object, but which may redefine fundamental Object operations like getting, setting, and defining122     * properties. Proxy objects are commonly used to log property accesses, validate, format, or sanitize inputs.123     * @param target A target object to wrap with Proxy.124     * @param handler An object whose properties define the behavior of Proxy when an operation is attempted on it.125     */126    new <T extends object>(target: T, handler: ProxyHandler<T>): T;127}128declare var Proxy: ProxyConstructor;129