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52 lines
1.7 KiB
52 lines
1.7 KiB
/** |
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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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