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'use strict';
/**
* Copyright (c) 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.
*
* @typechecks
*/
var camelize = require('./camelize');
var hyphenate = require('./hyphenate');
function asString(value) /*?string*/{
return value == null ? value : String(value);
}
function getStyleProperty( /*DOMNode*/node, /*string*/name) /*?string*/{
var computedStyle = void 0;
// W3C Standard
if (window.getComputedStyle) {
// In certain cases such as within an iframe in FF3, this returns null.
computedStyle = window.getComputedStyle(node, null);
if (computedStyle) {
return asString(computedStyle.getPropertyValue(hyphenate(name)));
}
}
// Safari
if (document.defaultView && document.defaultView.getComputedStyle) {
computedStyle = document.defaultView.getComputedStyle(node, null);
// A Safari bug causes this to return null for `display: none` elements.
if (computedStyle) {
return asString(computedStyle.getPropertyValue(hyphenate(name)));
}
if (name === 'display') {
return 'none';
}
}
// Internet Explorer
if (node.currentStyle) {
if (name === 'float') {
return asString(node.currentStyle.cssFloat || node.currentStyle.styleFloat);
}
return asString(node.currentStyle[camelize(name)]);
}
return asString(node.style && node.style[camelize(name)]);
}
module.exports = getStyleProperty;
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