31 lines
859 B
TypeScript
31 lines
859 B
TypeScript
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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {global} from '../util/global';
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/**
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* Used to inform TS about the `Proxy` class existing globally.
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*/
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interface GlobalWithProxy {
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Proxy: typeof Proxy;
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}
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/**
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* Creates an instance of a `Proxy` and creates with an empty target object and binds it to the
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* provided handler.
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*
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* The reason why this function exists is because IE doesn't support
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* the `Proxy` class. For this reason an error must be thrown.
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*/
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export function createProxy(handler: ProxyHandler<any>): {} {
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const g = global as any as GlobalWithProxy;
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if (!g.Proxy) {
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throw new Error('Proxy is not supported in this browser');
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}
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return new g.Proxy({}, handler);
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}
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