react-native/Libraries/Utilities/logError.js

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/**
* Copyright (c) 2015-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.
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*
* @providesModule logError
* @flow
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*/
'use strict';
/**
* Small utility that can be used as an error handler. You cannot just pass
* `console.error` as a failure callback - it's not properly bound. If passes an
* `Error` object, it will print the message and stack.
*/
var logError = function() {
if (arguments.length === 1 && arguments[0] instanceof Error) {
var err = arguments[0];
console.error('Error: "' + err.message + '". Stack:\n' + err.stack);
} else {
console.error.apply(console, arguments);
}
};
module.exports = logError;