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@drublic
Forked from LeaVerou/vunits.js
Created November 19, 2011 23:03
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Static polyfill for vw, vh, vm units
/**
* Polyfill for the vw, vh, vm units including StyleFix
* @author Lea Verou
*/
(function(){
if(!window.addEventListener) {
return;
}
var self = window.StyleFix = {
link: function(link) {
try {
if(!/\bstylesheet\b/i.test(link.rel) || !link.sheet.cssRules) {
return;
}
}
catch(e) {
return;
}
var url = link.href || link.getAttribute('data-href'),
base = url.replace(/[^\/]+$/, ''),
parent = link.parentNode,
xhr = new XMLHttpRequest();
xhr.open('GET', url);
xhr.onreadystatechange = function() {
if(xhr.readyState === 4) {
var css = xhr.responseText;
if(css && link.parentNode) {
css = self.fix(css, true, link);
// Convert relative URLs to absolute, if needed
if(base) {
css = css.replace(/url\((?:'|")?(.+?)(?:'|")?\)/gi, function($0, url) {
if(!/^([a-z]{3,10}:|\/)/i.test(url)) { // If url not absolute
// May contain sequences like /../ and /./ but those DO work
return 'url("' + base + url + '")';
}
return $0;
});
// behavior URLs shoudn’t be converted (Issue #19)
css = css.replace(RegExp('\\b(behavior:\\s*?url\\(\'?"?)' + base, 'gi'), '$1');
}
var style = document.createElement('style');
style.textContent = css;
style.media = link.media;
style.disabled = link.disabled;
style.setAttribute('data-href', link.getAttribute('href'));
parent.insertBefore(style, link);
parent.removeChild(link);
}
}
};
xhr.send(null);
link.setAttribute('data-inprogress', '');
},
styleElement: function(style) {
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);
},
register: function(fixer, index) {
(self.fixers = self.fixers || [])
.splice(index === undefined? self.fixers.length : index, 0, fixer);
},
fix: function(css, raw) {
for(var i=0; i<self.fixers.length; i++) {
css = self.fixers[i](css, raw) || 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));
}
// Feature test
var dummy = document.createElement('_').style,
units = ['vw', 'vh', 'vm'].filter(function(unit) {
dummy.width = '';
dummy.width = '10' + unit;
return !dummy.width;
});
if(!units.length) {
return;
}
StyleFix.register(function(css) {
var w = innerWidth, h = innerHeight, m = Math.min(w,h);
return css.replace(RegExp('\\b(\\d+)(' + units.join('|') + ')\\b', 'gi'), function($0, num, unit) {
switch (unit) {
case 'vw':
return (num * w / 100) + 'px';
case 'vh':
return num * h / 100 + 'px';
case 'vm':
return num * m / 100 + 'px';
}
});
});
})();
@jatin03
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jatin03 commented Jun 5, 2015

it's not working with window resize in safari browser.

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