react-bootstrap/src/react-es6/lib/cloneWithProps.js

Bootstrap 3 components build with React

"use strict";

import ReactPropTransferer from './ReactPropTransferer';

import keyOf from './keyOf';

var CHILDREN_PROP = keyOf({children: null});

/**
 * Sometimes you want to change the props of a child passed to you. Usually
 * this is to add a CSS class.
 *
 * @param {object} child child component you'd like to clone
 * @param {object} props props you'd like to modify. They will be merged
 * as if you used `transferPropsTo()`.
 * @return {object} a clone of child with props merged in.
 */
function cloneWithProps (child, props) {
  var newProps = ReactPropTransferer.mergeProps(props, child.props);

  // Use `child.props.children` if it is provided.
  if (!newProps.hasOwnProperty(CHILDREN_PROP) &&
      child.props.hasOwnProperty(CHILDREN_PROP)) {
    newProps.children = child.props.children;
  }

  return child.constructor.ConvenienceConstructor(newProps);
}

export default = cloneWithProps;