react-dom/lib/ReactDOMFiberOption.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';

var _assign = require('object-assign');

var React = require('react/lib/React');

var warning = require('fbjs/lib/warning');

function flattenChildren(children) {
  var content = '';

  // Flatten children and warn if they aren't strings or numbers;
  // invalid types are ignored.
  // We can silently skip them because invalid DOM nesting warning
  // catches these cases in Fiber.
  React.Children.forEach(children, function (child) {
    if (child == null) {
      return;
    }
    if (typeof child === 'string' || typeof child === 'number') {
      content += child;
    }
  });

  return content;
}

/**
 * Implements an <option> host component that warns when `selected` is set.
 */
var ReactDOMOption = {
  mountWrapper: function (element, props) {
    // TODO (yungsters): Remove support for `selected` in <option>.
    if (process.env.NODE_ENV !== 'production') {
      process.env.NODE_ENV !== 'production' ? warning(props.selected == null, 'Use the `defaultValue` or `value` props on <select> instead of ' + 'setting `selected` on <option>.') : void 0;
    }
  },

  postMountWrapper: function (element, props) {
    // value="" should make a value attribute (#6219)
    if (props.value != null) {
      element.setAttribute('value', props.value);
    }
  },

  getHostProps: function (element, props) {
    var hostProps = _assign({ children: undefined }, props);

    var content = flattenChildren(props.children);

    if (content) {
      hostProps.children = content;
    }

    return hostProps;
  }

};

module.exports = ReactDOMOption;