react-native/Libraries/Utilities/RCTLog.js

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/**
* Copyright 2004-present Facebook. All Rights Reserved.
*
* @providesModule RCTLog
*/
/* globals nativeLoggingHook */
'use strict';
var invariant = require('invariant');
var levelsMap = {
log: 'log',
info: 'info',
warn: 'warn',
error: 'error',
mustfix: '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 nativeLoggingHook === 'undefined') {
// We already printed in xcode, so only log here if using a js debugger
console[logFn].apply(console, args);
}
return true;
}
}
module.exports = RCTLog;