58 lines
1.7 KiB
JavaScript
58 lines
1.7 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule HMRClient
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*/
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'use strict';
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const invariant = require('invariant');
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/**
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* HMR Client that receives from the server HMR updates and propagates them
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* runtime to reflects those changes.
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*/
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const HMRClient = {
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enable(platform, bundleEntry) {
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invariant(platform, 'Missing required parameter `platform`');
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invariant(bundleEntry, 'Missing required paramenter `bundleEntry`');
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// TODO(martinb) receive host and port as parameters
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const host = 'localhost';
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const port = '8081';
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// need to require WebSocket inside of `enable` function because the
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// this module is defined as a `polyfillGlobal`.
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// See `InitializeJavascriptAppEngine.js`
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const WebSocket = require('WebSocket');
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const activeWS = new WebSocket(
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`ws://${host}:${port}/hot?platform=${platform}&` +
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`bundleEntry=${bundleEntry.replace('.bundle', '.js')}`
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);
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activeWS.onerror = (e) => {
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throw new Error(
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`Hot loading isn't working because it cannot connect to the development server.
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Ensure the following:
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- Node server is running and available on the same network
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- run 'npm start' from react-native root
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- Node server URL is correctly set in AppDelegate
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URL: ${host}:${port}
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Error: ${e.message}`
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);
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};
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activeWS.onmessage = (m) => {
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eval(m.data); // eslint-disable-line no-eval
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};
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},
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};
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module.exports = HMRClient;
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