react-native/Libraries/Utilities/RCTLog.js

50 lines
1.1 KiB
JavaScript

/**
* 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.
*
* @providesModule RCTLog
* @flow
*/
'use strict';
var BatchedBridge = require('BatchedBridge');
var invariant = require('invariant');
var levelsMap = {
log: 'log',
info: 'info',
warn: 'warn',
error: 'error',
fatal: 'error',
};
class RCTLog {
// level one of log, info, warn, error, mustfix
static logIfNoNativeHook() {
var args = Array.prototype.slice.call(arguments);
var level = args.shift();
var logFn = levelsMap[level];
invariant(
logFn,
'Level "' + level + '" not one of ' + Object.keys(levelsMap)
);
if (typeof global.nativeLoggingHook === 'undefined') {
// We already printed in xcode, so only log here if using a js debugger
console[logFn].apply(console, args);
}
return true;
}
}
BatchedBridge.registerCallableModule(
'RCTLog',
RCTLog
);
module.exports = RCTLog;