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/**
* Copyright 2014-2015, 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';
/**
* Similar to invariant but only logs a warning if the condition is not met.
* This can be used to log issues in development environments in critical
* paths. Removing the logging code for production environments will keep the
* same logic and follow the same code paths.
*/
var __DEV__ = process.env.NODE_ENV !== 'production';
var warning = function() {};
if (__DEV__) {
warning = function(condition, format, args) {
var len = arguments.length;
args = new Array(len > 2 ? len - 2 : 0);
for (var key = 2; key < len; key++) {
args[key - 2] = arguments[key];
}
if (format === undefined) {
throw new Error(
'`warning(condition, format, ...args)` requires a warning ' +
'message argument'
);
}
if (format.length < 10 || (/^[s\W]*$/).test(format)) {
throw new Error(
'The warning format should be able to uniquely identify this ' +
'warning. Please, use a more descriptive format than: ' + format
);
}
if (!condition) {
var argIndex = 0;
var message = 'Warning: ' +
format.replace(/%s/g, function() {
return args[argIndex++];
});
if (typeof console !== 'undefined') {
console.error(message);
}
try {
// This error was thrown as a convenience so that you can use this stack
// to find the callsite that caused this warning to fire.
throw new Error(message);
} catch(x) {}
}
};
}
module.exports = warning;