93 lines
2.3 KiB
JavaScript
93 lines
2.3 KiB
JavaScript
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/**
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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 error-guard
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* @polyfill
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* @nolint
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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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