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index.js
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index.js
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;(function(window){
'use strict';
function unitify(input){
var _w = Math.max(document.documentElement.clientWidth, window.innerWidth || 0);
var _h = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
var regex = /(^(-?\d+)(px|vmin|vmax|%|vh|vw|in|pt|pc)|0)$/i;
var regexResult = regex.exec(input);
var inputRawString = regexResult[2] || input;
var inputRawNumber = parseFloat(inputRawString);
var unit = regexResult[3] || 'px';
var converters = {
'px': function(){
return {
raw: inputRawNumber,
vmin: inputRawNumber * 100 / Math.min(_w, _h),
vmax: inputRawNumber * 100 / Math.max(_w, _h),
'%': function(relative) {
return inputRawNumber * 100 / relative;
},
vh: inputRawNumber * 100 / _h,
vw: inputRawNumber * 100 / _w,
in: inputRawNumber / 96,
pt: inputRawNumber * 0.75,
pc: inputRawNumber * 0.0625
}
},
'vmin': function(){
var _pixels = inputRawNumber * Math.min(_w, _h) / 100;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmax: _pixels * Math.max(_w, _h) / 100,
'%': function(relative) {
return _pixels * 100 / relative;
},
vh: _pixels * 100 / _h,
vw: _pixels * 100 / _w,
in: _pixels / 96,
pt: _pixels * 0.75,
pc: _pixels * 0.0625
}
},
'vmax': function(){
var _pixels = inputRawNumber * Math.max(_w, _h) / 100;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * Math.min(_w, _h) / 100,
'%': function(relative) {
return _pixels * 100 / relative;
},
vh: _pixels * 100 / _h,
vw: _pixels * 100 / _w,
in: _pixels / 96,
pt: _pixels * 0.75,
pc: _pixels * 0.0625
}
},
'%': function(relative){
if (typeof relative === 'undefined'){
throw 'Percentage requires relative argument for value ' + inputRawNumber;
}
var _pixels = inputRawNumber * 100 / relative;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * 100 / Math.min(_w, _h),
vmax: _pixels * 100 / Math.max(_w, _h),
vh: _pixels * 100 / _h,
vw: _pixels * 100 / _w,
in: _pixels / 96,
pt: _pixels * 0.75,
pc: _pixels * 0.0625
}
},
'vh': function(){
var _pixels = inputRawNumber * _h / 100;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * 100 / Math.min(_w, _h),
vmax: _pixels * 100 / Math.max(_w, _h),
'%': function(relative) {
return _pixels * 100 / relative;
},
vw: _pixels * 100 / _w,
in: _pixels / 96,
pt: _pixels * 0.75,
pc: _pixels * 0.0625
}
},
'vw': function(){
var _pixels = inputRawNumber * _w / 100;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * 100 / Math.min(_w, _h),
vmax: _pixels * 100 / Math.max(_w, _h),
'%': function(relative) {
return _pixels * 100 / relative;
},
vh: _pixels * 100 / _h,
in: _pixels / 96,
pt: _pixels * 0.75,
pc: _pixels * 0.0625
}
},
'in': function(){
var _pixels = inputRawNumber / 96;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * 100 / Math.min(_w, _h),
vmax: _pixels * 100 / Math.max(_w, _h),
'%': function(relative) {
return _pixels * 100 / relative;
},
vw: _pixels * 100 / _w,
vh: _pixels * 100 / _h,
pt: _pixels * 0.75,
pc: _pixels * 0.0625
}
},
'pt': function(){
var _pixels = inputRawNumber * 0.75;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * 100 / Math.min(_w, _h),
vmax: _pixels * 100 / Math.max(_w, _h),
'%': function(relative) {
return _pixels * 100 / relative;
},
vw: _pixels * 100 / _w,
vh: _pixels * 100 / _h,
in: _pixels / 96,
pc: _pixels * 0.0625
}
},
'pc': function(){
var _pixels = inputRawNumber * 0.0625;
return {
raw: inputRawNumber,
px: _pixels + 'px',
vmin: _pixels * 100 / Math.min(_w, _h),
vmax: _pixels * 100 / Math.max(_w, _h),
'%': function(relative) {
return _pixels * 100 / relative;
},
vw: _pixels * 100 / _w,
vh: _pixels * 100 / _h,
in: _pixels / 96,
pt: _pixels * 0.75
}
}
};
if(converters[unit]) {
return converters[unit]();
} else {
return converters['px']();
}
}
window.unitify = unitify;
})(window);