mirror of
https://github.com/status-im/react-native.git
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ad0fe15e2e
Summary:
React Native bundler (aka Metro Bundler) was splitted from the main codebase some time ago (now it lives [[https://github.com/facebook/metro-bundler|here]]). To make it more agnostic, polyfills will be moved out from it, so people who doesn't need them does not include them. However, RN will still need them, so the first step is to copy them back to RN so that we can provide them to Metro Bundler later.
We also include a way of passing the list of polyfills to include, as an `Array<string>`. The field is called `polyfills`, and defaults to the traditional list that is currently included in the package manager [see here](be1843cddc/packages/metro-bundler/src/defaults.js (L27-L37)).
In future commits, `metro-bundler` will be able to manage the `polyfills` array passed to it, and use it, instead of the pre-defined ones.
Reviewed By: davidaurelio
Differential Revision: D5381614
fbshipit-source-id: 749d536b781843ecb3067803e44398cd6df941f1
91 lines
2.2 KiB
JavaScript
91 lines
2.2 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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* @polyfill
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*/
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/* eslint-disable strict */
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let _inGuard = 0;
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/**
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* This is the error handler that is called when we encounter an exception
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* when loading a module. This will report any errors encountered before
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* ExceptionsManager is configured.
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*/
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let _globalHandler = function onError(e) {
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throw e;
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};
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/**
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* The particular require runtime that we are using looks for a global
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* `ErrorUtils` object and if it exists, then it requires modules with the
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* error handler specified via ErrorUtils.setGlobalHandler by calling the
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* require function with applyWithGuard. Since the require module is loaded
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* before any of the modules, this ErrorUtils must be defined (and the handler
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* set) globally before requiring anything.
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*/
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const ErrorUtils = {
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setGlobalHandler(fun) {
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_globalHandler = fun;
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},
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getGlobalHandler() {
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return _globalHandler;
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},
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reportError(error) {
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_globalHandler && _globalHandler(error);
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},
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reportFatalError(error) {
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_globalHandler && _globalHandler(error, true);
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},
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applyWithGuard(fun, context, args) {
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try {
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_inGuard++;
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return fun.apply(context, args);
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} catch (e) {
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ErrorUtils.reportError(e);
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} finally {
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_inGuard--;
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}
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return null;
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},
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applyWithGuardIfNeeded(fun, context, args) {
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if (ErrorUtils.inGuard()) {
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return fun.apply(context, args);
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} else {
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ErrorUtils.applyWithGuard(fun, context, args);
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}
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return null;
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},
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inGuard() {
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return _inGuard;
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},
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guard(fun, name, context) {
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if (typeof fun !== 'function') {
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console.warn('A function must be passed to ErrorUtils.guard, got ', fun);
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return null;
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}
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name = name || fun.name || '<generated guard>';
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function guarded() {
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return (
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ErrorUtils.applyWithGuard(
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fun,
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context || this,
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arguments,
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null,
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name
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)
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);
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}
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return guarded;
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},
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};
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global.ErrorUtils = ErrorUtils;
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