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Diffstat (limited to 'node_modules/react-dom/lib/ReactErrorUtils.js')
-rw-r--r-- | node_modules/react-dom/lib/ReactErrorUtils.js | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/ReactErrorUtils.js b/node_modules/react-dom/lib/ReactErrorUtils.js new file mode 100644 index 000000000..d8b59dbd7 --- /dev/null +++ b/node_modules/react-dom/lib/ReactErrorUtils.js @@ -0,0 +1,75 @@ +/** + * 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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