Extract ReactPropTypes to separate module

addons/prop-types/README.md

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+# prop-types
+
+Runtime type checking for React props and similar objects.
+
+Refer to the [React documentation](https://facebook.github.io/react/docs/typechecking-with-proptypes.html) for more information.

addons/prop-types/checkPropTypes.js

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+/**
+ * Copyright 2013-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.
+ */
+
+'use strict';
+
+var invariant = require('fbjs/lib/invariant');
+var warning = require('fbjs/lib/warning');
+
+var ReactPropTypesSecret = require('./lib/ReactPropTypesSecret');
+
+var loggedTypeFailures = {};
+
+/**
+ * Assert that the values match with the type specs.
+ * Error messages are memorized and will only be shown once.
+ *
+ * @param {object} typeSpecs Map of name to a ReactPropType
+ * @param {object} values Runtime values that need to be type-checked
+ * @param {string} location e.g. "prop", "context", "child context"
+ * @param {string} componentName Name of the component for error messages.
+ * @param {?Function} getStack Returns the component stack.
+ * @private
+ */
+function checkPropTypes(typeSpecs, values, location, componentName, getStack) {
+  if (process.env.NODE_ENV !== 'production') {
+    for (var typeSpecName in typeSpecs) {
+      if (typeSpecs.hasOwnProperty(typeSpecName)) {
+        var error;
+        // Prop type validation may throw. In case they do, we don't want to
+        // fail the render phase where it didn't fail before. So we log it.
+        // After these have been cleaned up, we'll let them throw.
+        try {
+          // This is intentionally an invariant that gets caught. It's the same
+          // behavior as without this statement except with a better message.
+          invariant(typeof typeSpecs[typeSpecName] === 'function', '%s: %s type `%s` is invalid; it must be a function, usually from ' + 'React.PropTypes.', componentName || 'React class', location, typeSpecName);
+          error = typeSpecs[typeSpecName](values, typeSpecName, componentName, location, null, ReactPropTypesSecret);
+        } catch (ex) {
+          error = ex;
+        }
+        process.env.NODE_ENV !== 'production' ? warning(!error || error instanceof Error, '%s: type specification of %s `%s` is invalid; the type checker ' + 'function must return `null` or an `Error` but returned a %s. ' + 'You may have forgotten to pass an argument to the type checker ' + 'creator (arrayOf, instanceOf, objectOf, oneOf, oneOfType, and ' + 'shape all require an argument).', componentName || 'React class', location, typeSpecName, typeof error) : void 0;
+        if (error instanceof Error && !(error.message in loggedTypeFailures)) {
+          // Only monitor this failure once because there tends to be a lot of the
+          // same error.
+          loggedTypeFailures[error.message] = true;
+
+          var stack = getStack ? getStack() : '';
+
+          process.env.NODE_ENV !== 'production' ? warning(false, 'Failed %s type: %s%s', location, error.message, stack != null ? stack : '') : void 0;
+        }
+      }
+    }
+  }
+}
+
+module.exports = checkPropTypes;