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/**
* Copyright 2013-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*
*/
'use strict';
var caughtError = null;
/**
* Call a function while guarding against errors that happens within it.
*
* @param {String} name of the guard to use for logging or debugging
* @param {Function} func The function to invoke
* @param {*} a First argument
* @param {*} b Second argument
*/
function invokeGuardedCallback(name, func, a) {
try {
func(a);
} catch (x) {
if (caughtError === null) {
caughtError = x;
}
}
}
var ReactErrorUtils = {
invokeGuardedCallback: invokeGuardedCallback,
/**
* Invoked by ReactTestUtils.Simulate so that any errors thrown by the event
* handler are sure to be rethrown by rethrowCaughtError.
*/
invokeGuardedCallbackWithCatch: invokeGuardedCallback,
/**
* During execution of guarded functions we will capture the first error which
* we will rethrow to be handled by the top level error handler.
*/
rethrowCaughtError: function () {
if (caughtError) {
var error = caughtError;
caughtError = null;
throw error;
}
}
};
if (process.env.NODE_ENV !== 'production') {
/**
* To help development we can get better devtools integration by simulating a
* real browser event.
*/
if (typeof window !== 'undefined' && typeof window.dispatchEvent === 'function' && typeof document !== 'undefined' && typeof document.createEvent === 'function') {
var fakeNode = document.createElement('react');
ReactErrorUtils.invokeGuardedCallback = function (name, func, a) {
var boundFunc = func.bind(null, a);
var evtType = 'react-' + name;
fakeNode.addEventListener(evtType, boundFunc, false);
var evt = document.createEvent('Event');
evt.initEvent(evtType, false, false);
fakeNode.dispatchEvent(evt);
fakeNode.removeEventListener(evtType, boundFunc, false);
};
}
}
module.exports = ReactErrorUtils;
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