react app

react-app/node_modules/react/lib/warning.js

@@ -0,0 +1,59 @@
+/**
+ * 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.
+ *
+ * @providesModule warning
+ */
+
+"use strict";
+
+var emptyFunction = require("./emptyFunction");
+
+/**
+ * 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 warning = emptyFunction;
+
+if ("production" !== process.env.NODE_ENV) {
+  warning = function(condition, format ) {for (var args=[],$__0=2,$__1=arguments.length;$__0<$__1;$__0++) args.push(arguments[$__0]);
+    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 (format.indexOf('Failed Composite propType: ') === 0) {
+      return; // Ignore CompositeComponent proptype check.
+    }
+
+    if (!condition) {
+      var argIndex = 0;
+      var message = 'Warning: ' + format.replace(/%s/g, function()  {return args[argIndex++];});
+      console.warn(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) {}
+    }
+  };
+}
+
+module.exports = warning;