/
mediaQueryAnalyzer.js
64 lines (58 loc) · 1.3 KB
/
mediaQueryAnalyzer.js
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window.mediaQueries=function()
{
getTemplatedMediaQueries();
}
window.addEventListener('resize', function() {
getTemplatedMediaQueries();
});
let html=document.createElement("div");
document.body.appendChild(html);
html.outerHTML=`
<style>
#mediaQueriesInfo
{
position: fixed;
left: 0;
top: 0;
opacity: 0.5;
z-Index: 1000000;
}
</style>
<div id=mediaQueriesInfo></div>
`;
getTemplatedMediaQueries();
// ----------------------------------------------------------------------------
// Functions
// ----------------------------------------------------------------------------
function getTemplatedMediaQueries()
{
let queries=getMediaQueries();
let s="";
s+=window.innerWidth + " x " + window.innerHeight +"<br>";
queries.forEach(q=>{
if (window.matchMedia(q).matches) s+="* ";
s+=q+"<br>";
});
document.querySelector("#mediaQueriesInfo").innerHTML=s;
}
function getMediaQueries()
{
let r = [];
let sheets = document.styleSheets;
for (let i=0; i<sheets.length; i++)
{
let rules = sheets[i].cssRules;
for (let j=0; j<rules.length; j++)
{
if (rules[j].type == CSSRule.MEDIA_RULE)
{
let rule=rules[j].media.mediaText;
// No idea why some queries appear twice
// Let's ignore dupes:
if (r.includes(rule)) continue;
r.push(rule);
}
}
}
return r;
}