html - Writing media queries for mobile devices, low-res desktop and hi-res desktop -

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this question has answer here:

i'm using both screen width , screen height detect difference between mobile , desktops , detect high resolution desktops vs. low resolution desktops.

i have javascript use load different css files. looks this:

javascript

<script>   if (screen.width > 800) {       if (screen.height < 900) {        document.write('<link href="/lowres.css" type="text/css" />');      } else {        document.write('<link href="/hires.css" type="text/css" />');      }  } else {      document.write('<meta name="viewport" content="width=device-width,initial-scale=1">');     document.write('<link href="/mobile.css" type="text/css" />');  } </script>

i want change , use media queries, , have:

css

<link media="screen , (min-device-width: 801px) , (min-device-width: 801px)" href="low.css" rel="stylesheet" /> <link media="screen , (min-device-height: 901px)" href="hi.css" rel="stylesheet" /> <link media="screen , (max-device-width: 800px) , (orientation : portrait), screen , (max-device-height: 800px) , (orientation : landscape)" href="mobile.css" rel="stylesheet" />

this allows mobile stylesheet downloaded regardless of orientation. however, desktop stylesheet set hi-res if it's low-res.

enter image description here

as can see, i've got desktop mode on height 800px, media query set min-device-height:901px , yet it's downloading hi-res stylesheet. why that?

thanks.

include css files <head>. alternatively, can combine them single css file.

<meta name="viewport" content="width=device-width,initial-scale=1"> <link href="/mobile.css" type="text/css" /> <link href="/lowres.css" type="text/css" /> <link href="/hires.css" type="text/css" />

then change files wrapping contents media queries. 

@media (max-width: 800px) {      // contents of mobile.css } @media (min-width: 801px) , (max-height:900px) {      // contents of lowres.css } @media (min-width: 801px) , (min-height:901px) {      // contents of hires.css }

take here css media queries. alternative use nested media queries old browsers might not support them.


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