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/**
* 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';
/**
* CSS properties which accept numbers but are not in units of "px".
*/
var isUnitlessNumber = {
animationIterationCount: true,
borderImageOutset: true,
borderImageSlice: true,
borderImageWidth: true,
boxFlex: true,
boxFlexGroup: true,
boxOrdinalGroup: true,
columnCount: true,
flex: true,
flexGrow: true,
flexPositive: true,
flexShrink: true,
flexNegative: true,
flexOrder: true,
gridRow: true,
gridColumn: true,
fontWeight: true,
lineClamp: true,
lineHeight: true,
opacity: true,
order: true,
orphans: true,
tabSize: true,
widows: true,
zIndex: true,
zoom: true,
// SVG-related properties
fillOpacity: true,
floodOpacity: true,
stopOpacity: true,
strokeDasharray: true,
strokeDashoffset: true,
strokeMiterlimit: true,
strokeOpacity: true,
strokeWidth: true
};
/**
* @param {string} prefix vendor-specific prefix, eg: Webkit
* @param {string} key style name, eg: transitionDuration
* @return {string} style name prefixed with `prefix`, properly camelCased, eg:
* WebkitTransitionDuration
*/
function prefixKey(prefix, key) {
return prefix + key.charAt(0).toUpperCase() + key.substring(1);
}
/**
* Support style names that may come passed in prefixed by adding permutations
* of vendor prefixes.
*/
var prefixes = ['Webkit', 'ms', 'Moz', 'O'];
// Using Object.keys here, or else the vanilla for-in loop makes IE8 go into an
// infinite loop, because it iterates over the newly added props too.
Object.keys(isUnitlessNumber).forEach(function (prop) {
prefixes.forEach(function (prefix) {
isUnitlessNumber[prefixKey(prefix, prop)] = isUnitlessNumber[prop];
});
});
/**
* Most style properties can be unset by doing .style[prop] = '' but IE8
* doesn't like doing that with shorthand properties so for the properties that
* IE8 breaks on, which are listed here, we instead unset each of the
* individual properties. See http://bugs.jquery.com/ticket/12385.
* The 4-value 'clock' properties like margin, padding, border-width seem to
* behave without any problems. Curiously, list-style works too without any
* special prodding.
*/
var shorthandPropertyExpansions = {
background: {
backgroundAttachment: true,
backgroundColor: true,
backgroundImage: true,
backgroundPositionX: true,
backgroundPositionY: true,
backgroundRepeat: true
},
backgroundPosition: {
backgroundPositionX: true,
backgroundPositionY: true
},
border: {
borderWidth: true,
borderStyle: true,
borderColor: true
},
borderBottom: {
borderBottomWidth: true,
borderBottomStyle: true,
borderBottomColor: true
},
borderLeft: {
borderLeftWidth: true,
borderLeftStyle: true,
borderLeftColor: true
},
borderRight: {
borderRightWidth: true,
borderRightStyle: true,
borderRightColor: true
},
borderTop: {
borderTopWidth: true,
borderTopStyle: true,
borderTopColor: true
},
font: {
fontStyle: true,
fontVariant: true,
fontWeight: true,
fontSize: true,
lineHeight: true,
fontFamily: true
},
outline: {
outlineWidth: true,
outlineStyle: true,
outlineColor: true
}
};
var CSSProperty = {
isUnitlessNumber: isUnitlessNumber,
shorthandPropertyExpansions: shorthandPropertyExpansions
};
module.exports = CSSProperty;
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