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/**
* StyleFix 1.0.3 & PrefixFree 1.0.7
* @author Lea Verou
* MIT license
*/
(function(){
if(!window.addEventListener) {
return;
}
var self = window.StyleFix = {
optIn: document.currentScript.hasAttribute("data-prefix"),
link: function(link) {
var url = link.href || link.getAttribute('data-href');
try {
// Ignore stylesheets with data-noprefix attribute as well as alternate stylesheets or without (data-)href attribute
if(!url || link.rel !== 'stylesheet' || link.hasAttribute('data-noprefix')
|| (self.optIn && !link.hasAttribute('data-prefix')) ) {
return;
}
}
catch(e) {
return;
}
var base = url.replace(/[^\/]+$/, ''),
base_scheme = (/^[a-z]{3,10}:/.exec(base) || [''])[0],
base_domain = (/^[a-z]{3,10}:\/\/[^\/]+/.exec(base) || [''])[0],
base_query = /^([^?]*)\??/.exec(url)[1],
parent = link.parentNode,
xhr = new XMLHttpRequest(),
process;
xhr.onreadystatechange = function() {
if(xhr.readyState === 4) {
process();
}
};
process = function() {
var css = xhr.responseText;
if(css && link.parentNode && (!xhr.status || xhr.status < 400 || xhr.status > 600)) {
css = self.fix(css, true, link);
// Convert relative URLs to absolute, if needed
if(css && base) {
css = css.replace(/url\(\s*?((?:"|')?)(.+?)\1\s*?\)/gi, function($0, quote, url) {
if(/^([a-z]{3,10}:|#)/i.test(url)) { // Absolute & or hash-relative
return $0;
}
else if(/^\/\//.test(url)) { // Scheme-relative
// May contain sequences like /../ and /./ but those DO work
return 'url("' + base_scheme + url + '")';
}
else if(/^\//.test(url)) { // Domain-relative
return 'url("' + base_domain + url + '")';
}
else if(/^\?/.test(url)) { // Query-relative
return 'url("' + base_query + url + '")';
}
else {
// Path-relative
return 'url("' + base + url + '")';
}
});
// behavior URLs shoudn’t be converted (Issue #19)
// base should be escaped before added to RegExp (Issue #81)
var escaped_base = base.replace(/([\\\^\$*+[\]?{}.=!:(|)])/g,"\\$1");
css = css.replace(RegExp('\\b(behavior:\\s*?url\\(\'?"?)' + escaped_base, 'gi'), '$1');
}
var style = document.createElement('style');
style.textContent = '/*# sourceURL='+link.getAttribute('href')+' */\n/*@ sourceURL='+link.getAttribute('href')+' */\n' + css;
style.media = link.media;
style.disabled = link.disabled;
style.setAttribute('data-href', link.getAttribute('href'));
if(link.id) style.id = link.id;
parent.insertBefore(style, link);
parent.removeChild(link);
style.media = link.media; // Duplicate is intentional. See issue #31
}
};
try {
xhr.open('GET', url);
xhr.send(null);
} catch (e) {
// Fallback to XDomainRequest if available
if (typeof XDomainRequest != "undefined") {
xhr = new XDomainRequest();
xhr.onerror = xhr.onprogress = function() {};
xhr.onload = process;
xhr.open("GET", url);
xhr.send(null);
}
}
link.setAttribute('data-inprogress', '');
},
styleElement: function(style) {
if (style.hasAttribute('data-noprefix')) {
return;
}
var disabled = style.disabled;
style.textContent = self.fix(style.textContent, true, style);
style.disabled = disabled;
},
styleAttribute: function(element) {
var css = element.getAttribute('style');
css = self.fix(css, false, element);
element.setAttribute('style', css);
},
process: function() {
// Linked stylesheets
$('link[rel="stylesheet"]:not([data-inprogress])').forEach(StyleFix.link);
// Inline stylesheets
$('style').forEach(StyleFix.styleElement);
// Inline styles
$('[style]').forEach(StyleFix.styleAttribute);
var event = document.createEvent('Event');
event.initEvent('StyleFixProcessed', true, true);
document.dispatchEvent(event);
},
register: function(fixer, index) {
(self.fixers = self.fixers || [])
.splice(index === undefined? self.fixers.length : index, 0, fixer);
},
fix: function(css, raw, element) {
if(self.fixers) {
for(var i=0; i<self.fixers.length; i++) {
css = self.fixers[i](css, raw, element) || css;
}
}
return css;
},
camelCase: function(str) {
return str.replace(/-([a-z])/g, function($0, $1) { return $1.toUpperCase(); }).replace('-','');
},
deCamelCase: function(str) {
return str.replace(/[A-Z]/g, function($0) { return '-' + $0.toLowerCase() });
}
};
/**************************************
* Process styles
**************************************/
(function(){
setTimeout(function(){
$('link[rel="stylesheet"]').forEach(StyleFix.link);
}, 10);
document.addEventListener('DOMContentLoaded', StyleFix.process, false);
})();
function $(expr, con) {
return [].slice.call((con || document).querySelectorAll(expr));
}
})();
/**
* PrefixFree
*/
(function(root){
if(!window.StyleFix || !window.getComputedStyle) {
return;
}
// Private helper
function fix(what, before, after, replacement, css) {
what = self[what];
if(what.length) {
var regex = RegExp(before + '(' + what.join('|') + ')' + after, 'gi');
css = css.replace(regex, replacement);
}
return css;
}
var self = window.PrefixFree = {
prefixCSS: function(css, raw, element) {
var prefix = self.prefix;
// Gradient angles hotfix
if(self.functions.indexOf('linear-gradient') > -1) {
// Gradients are supported with a prefix, convert angles to legacy
css = css.replace(/(\s|:|,)(repeating-)?linear-gradient\(\s*(-?\d*\.?\d*)deg/ig, function ($0, delim, repeating, deg) {
return delim + (repeating || '') + 'linear-gradient(' + (90-deg) + 'deg';
});
}
css = fix('functions', '(\\s|:|,)', '\\s*\\(', '$1' + prefix + '$2(', css);
css = fix('keywords', '(\\s|:)', '(\\s|;|\\}|$)', '$1' + prefix + '$2$3', css);
css = fix('properties', '(^|\\{|\\s|;)', '\\s*:', '$1' + prefix + '$2:', css);
// Prefix properties *inside* values (issue #8)
if (self.properties.length) {
var regex = RegExp('\\b(' + self.properties.join('|') + ')(?!:)', 'gi');
css = fix('valueProperties', '\\b', ':(.+?);', function($0) {
return $0.replace(regex, prefix + "$1")
}, css);
}
if(raw) {
css = fix('selectors', '', '\\b', self.prefixSelector, css);
css = fix('atrules', '@', '\\b', '@' + prefix + '$1', css);
}
// Fix double prefixing
css = css.replace(RegExp('-' + prefix, 'g'), '-');
// Prefix wildcard
css = css.replace(/-\*-(?=[a-z]+)/gi, self.prefix);
return css;
},
property: function(property) {
return (self.properties.indexOf(property) >=0 ? self.prefix : '') + property;
},
value: function(value, property) {
value = fix('functions', '(^|\\s|,)', '\\s*\\(', '$1' + self.prefix + '$2(', value);
value = fix('keywords', '(^|\\s)', '(\\s|$)', '$1' + self.prefix + '$2$3', value);
if(self.valueProperties.indexOf(property) >= 0) {
value = fix('properties', '(^|\\s|,)', '($|\\s|,)', '$1'+self.prefix+'$2$3', value);
}
return value;
},
prefixSelector: function(selector) {
return self.selectorMap[selector] || selector
},
// Warning: Prefixes no matter what, even if the property is supported prefix-less
prefixProperty: function(property, camelCase) {
var prefixed = self.prefix + property;
return camelCase? StyleFix.camelCase(prefixed) : prefixed;
}
};
/**************************************
* Properties
**************************************/
(function() {
var prefixes = {},
properties = [],
shorthands = {},
style = getComputedStyle(document.documentElement, null),
dummy = document.createElement('div').style;
// Why are we doing this instead of iterating over properties in a .style object? Because Webkit.
// 1. Older Webkit won't iterate over those.
// 2. Recent Webkit will, but the 'Webkit'-prefixed properties are not enumerable. The 'webkit'
// (lower case 'w') ones are, but they don't `deCamelCase()` into a prefix that we can detect.
var iterate = function(property) {
if(/^-[^-]/.test(property)) {
properties.push(property);
var parts = property.split('-'),
prefix = parts[1];
// Count prefix uses
prefixes[prefix] = ++prefixes[prefix] || 1;
// This helps determining shorthands
while(parts.length > 3) {
parts.pop();
var shorthand = parts.join('-');
if(supported(shorthand) && properties.indexOf(shorthand) === -1) {
properties.push(shorthand);
}
}
}
},
supported = function(property) {
return StyleFix.camelCase(property) in dummy;
}
// Some browsers have numerical indices for the properties, some don't
if(style && style.length > 0) {
for(var i=0; i<style.length; i++) {
iterate(style[i])
}
}
else {
for(var property in style) {
iterate(StyleFix.deCamelCase(property));
}
}
// Find most frequently used prefix
var highest = {uses:0};
for(var prefix in prefixes) {
var uses = prefixes[prefix];
if(highest.uses < uses) {
highest = {prefix: prefix, uses: uses};
}
}
self.prefix = '-' + highest.prefix + '-';
self.Prefix = StyleFix.camelCase(self.prefix);
self.properties = [];
// Get properties ONLY supported with a prefix
for(var i=0; i<properties.length; i++) {
var property = properties[i];
if(property.indexOf(self.prefix) === 0) { // we might have multiple prefixes, like Opera
var unprefixed = property.slice(self.prefix.length);
if(!supported(unprefixed)) {
self.properties.push(unprefixed);
}
}
}
// IE fix
if(self.Prefix == 'Ms'
&& !('transform' in dummy)
&& !('MsTransform' in dummy)
&& ('msTransform' in dummy)) {
self.properties.push('transform', 'transform-origin');
}
self.properties.sort();
})();
/**************************************
* Values
**************************************/
(function() {
// Values that might need prefixing
var functions = {
'linear-gradient': {
property: 'backgroundImage',
params: 'red, teal'
},
'calc': {
property: 'width',
params: '1px + 5%'
},
'element': {
property: 'backgroundImage',
params: '#foo'
},
'cross-fade': {
property: 'backgroundImage',
params: 'url(a.png), url(b.png), 50%'
},
'image-set': {
property: 'backgroundImage',
params: 'url(a.png) 1x, url(b.png) 2x'
}
};
functions['repeating-linear-gradient'] =
functions['repeating-radial-gradient'] =
functions['radial-gradient'] =
functions['linear-gradient'];
// Note: The properties assigned are just to *test* support.
// The keywords will be prefixed everywhere.
var keywords = {
'initial': 'color',
'grab': 'cursor',
'grabbing': 'cursor',
'zoom-in': 'cursor',
'zoom-out': 'cursor',
'box': 'display',
'flexbox': 'display',
'inline-flexbox': 'display',
'flex': 'display',
'inline-flex': 'display',
'grid': 'display',
'inline-grid': 'display',
'max-content': 'width',
'min-content': 'width',
'fit-content': 'width',
'fill-available': 'width',
'contain-floats': 'width'
};
self.functions = [];
self.keywords = [];
var style = document.createElement('div').style;
function supported(value, property) {
style[property] = '';
style[property] = value;
return !!style[property];
}
for (var func in functions) {
var test = functions[func],
property = test.property,
value = func + '(' + test.params + ')';
if (!supported(value, property)
&& supported(self.prefix + value, property)) {
// It's supported, but with a prefix
self.functions.push(func);
}
}
for (var keyword in keywords) {
var property = keywords[keyword];
if (!supported(keyword, property)
&& supported(self.prefix + keyword, property)) {
// It's supported, but with a prefix
self.keywords.push(keyword);
}
}
})();
/**************************************
* Selectors and @-rules
**************************************/
(function() {
var
selectors = {
':any-link': null,
'::backdrop': null,
':fullscreen': null,
':full-screen': ':fullscreen',
//sigh
'::placeholder': null,
':placeholder': ':placeholder-shown',
'::input-placeholder': '::placeholder',
':input-placeholder': ':placeholder-shown',
':read-only': null,
':read-write': null,
'::selection': null
},
atrules = {
'keyframes': 'name',
'viewport': null,
'document': 'regexp(".")'
};
self.selectors = [];
self.selectorMap = {};
self.atrules = [];
var style = root.appendChild(document.createElement('style'));
function supported(selector) {
style.textContent = selector + '{}'; // Safari 4 has issues with style.innerHTML
return !!style.sheet.cssRules.length;
}
for(var selector in selectors) {
var standard = selectors[selector] || selector
var prefixed = selector.replace(/::?/, function($0) { return $0 + self.prefix })
if(!supported(standard) && supported(prefixed)) {
self.selectors.push(standard);
self.selectorMap[standard] = prefixed;
}
}
for(var atrule in atrules) {
var test = atrule + ' ' + (atrules[atrule] || '');
if(!supported('@' + test) && supported('@' + self.prefix + test)) {
self.atrules.push(atrule);
}
}
root.removeChild(style);
})();
// Properties that accept properties as their value
self.valueProperties = [
'transition',
'transition-property',
'will-change'
]
// Add class for current prefix
root.className += ' ' + self.prefix;
StyleFix.register(self.prefixCSS);
})(document.documentElement);