react-dom/lib/getComponentName.js

React package for working with the DOM.

/**
 * 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';

function getComponentName(instanceOrFiber) {
  if (process.env.NODE_ENV !== 'production') {
    if (typeof instanceOrFiber.getName === 'function') {
      // Stack reconciler
      var instance = instanceOrFiber;
      return instance.getName() || 'Component';
    }
    if (typeof instanceOrFiber.tag === 'number') {
      // Fiber reconciler
      var fiber = instanceOrFiber;
      var type = fiber.type;

      if (typeof type === 'string') {
        return type;
      }
      if (typeof type === 'function') {
        return type.displayName || type.name || null;
      }
    }
  }
  return null;
}

module.exports = getComponentName;