46 строки
1.1 KiB
JavaScript
46 строки
1.1 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow
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*/
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'use strict';
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import NativeSourceCode from '../../NativeModules/specs/NativeSourceCode';
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let _cachedDevServerURL: ?string;
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let _cachedFullBundleURL: ?string;
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const FALLBACK = 'http://localhost:8081/';
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type DevServerInfo = {
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url: string,
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fullBundleUrl: ?string,
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bundleLoadedFromServer: boolean,
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...
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};
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/**
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* Many RN development tools rely on the development server (packager) running
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* @return URL to packager with trailing slash
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*/
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function getDevServer(): DevServerInfo {
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if (_cachedDevServerURL === undefined) {
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const scriptUrl = NativeSourceCode.getConstants().scriptURL;
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const match = scriptUrl.match(/^https?:\/\/.*?\//);
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_cachedDevServerURL = match ? match[0] : null;
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_cachedFullBundleURL = match ? scriptUrl : null;
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}
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return {
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url: _cachedDevServerURL || FALLBACK,
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fullBundleUrl: _cachedFullBundleURL,
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bundleLoadedFromServer: _cachedDevServerURL !== null,
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};
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}
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module.exports = getDevServer;
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