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Contents
/**
* Copyright 2013-2015, 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 flattenChildren
*/
'use strict';
var traverseAllChildren = require('./traverseAllChildren');
var warning = require('fbjs/lib/warning');
/**
* @param {function} traverseContext Context passed through traversal.
* @param {?ReactComponent} child React child component.
* @param {!string} name String name of key path to child.
*/
function flattenSingleChildIntoContext(traverseContext, child, name) {
// We found a component instance.
var result = traverseContext;
var keyUnique = result[name] === undefined;
if (process.env.NODE_ENV !== 'production') {
process.env.NODE_ENV !== 'production' ? warning(keyUnique, 'flattenChildren(...): Encountered two children with the same key, ' + '`%s`. Child keys must be unique; when two children share a key, only ' + 'the first child will be used.', name) : undefined;
}
if (keyUnique && child != null) {
result[name] = child;
}
}
/**
* Flattens children that are typically specified as `props.children`. Any null
* children will not be included in the resulting object.
* @return {!object} flattened children keyed by name.
*/
function flattenChildren(children) {
if (children == null) {
return children;
}
var result = {};
traverseAllChildren(children, flattenSingleChildIntoContext, result);
return result;
}
module.exports = flattenChildren;
Version data entries
5 entries across 3 versions & 1 rubygems