Current File : //var/www/html/node_modules/warning/warning.js
/**
* Copyright (c) 2014-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'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__) {
var printWarning = function printWarning(format, args) {
var len = arguments.length;
args = new Array(len > 1 ? len - 1 : 0);
for (var key = 1; key < len; key++) {
args[key - 1] = arguments[key];
}
var argIndex = 0;
var message = 'Warning: ' +
format.replace(/%s/g, function() {
return args[argIndex++];
});
if (typeof console !== 'undefined') {
console.error(message);
}
try {
// --- Welcome to debugging React ---
// 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) {}
}
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 (!condition) {
printWarning.apply(null, [format].concat(args));
}
};
}
module.exports = warning;
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