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53 lines
1.7 KiB
53 lines
1.7 KiB
10 years ago
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/**
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* Copyright 2013-2015, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @providesModule cx
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*/
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/**
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* This function is used to mark string literals representing CSS class names
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* so that they can be transformed statically. This allows for modularization
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* and minification of CSS class names.
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*
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* In static_upstream, this function is actually implemented, but it should
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* eventually be replaced with something more descriptive, and the transform
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* that is used in the main stack should be ported for use elsewhere.
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*
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* @param string|object className to modularize, or an object of key/values.
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* In the object case, the values are conditions that
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* determine if the className keys should be included.
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* @param [string ...] Variable list of classNames in the string case.
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* @return string Renderable space-separated CSS className.
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*/
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'use strict';
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var warning = require("./warning");
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var warned = false;
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function cx(classNames) {
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if ("production" !== process.env.NODE_ENV) {
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("production" !== process.env.NODE_ENV ? warning(
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warned,
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'React.addons.classSet will be deprecated in a future version. See ' +
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'http://fb.me/react-addons-classset'
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) : null);
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warned = true;
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}
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if (typeof classNames == 'object') {
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return Object.keys(classNames).filter(function(className) {
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return classNames[className];
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}).join(' ');
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} else {
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return Array.prototype.join.call(arguments, ' ');
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}
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}
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module.exports = cx;
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