How to change CSS based on mobile device?

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In the following example, I want to display only one div, depending on the device.

I\'m familiar with how to use @media to override a CSS cla

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难免孤独

2021-02-07 05:42

Hm i think its easier to create 2 or more css files and load them via javascript based on the device. Something like that inside the onload function:

var cssPath = "standard.css";
if (navigator.platform == "iPad")
    cssPath = "iPad.css";

var fileref = document.createElement("link");

fileref.setAttribute("rel", "stylesheet");
fileref.setAttribute("type", "text/css");
fileref.setAttribute("href", cssPath);

document.getElementsByTagName("head")[0].appendChild(fileref);

Shorter and more readable css files easy to exchange.

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夕颜

2021-02-07 05:42
In such simple cases that's all you need:
```
<meta name="viewport" content="width=device-width, initial-scale=1.0">
```
Try to use e.g. width:100% or max-width - rather than fixed widths.
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故里飘歌

2021-02-07 06:01

I know that this is an old thread but i figured a better option.. for me at least

<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=1">
<?php 
if(preg_match('/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i',$useragent)||preg_match('/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i',substr($useragent,0,4)))
{   echo '<link type="text/css" rel="stylesheet" media="all" href="/styles/mobile.css">';
}
else{
echo '<link type="text/css" rel="stylesheet" media="all" href="/styles/desktop.css">';
};
?>

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耶瑟儿～

2021-02-07 06:05
how to do a conditionnal css media query :
```
@media only screen and (width : 1024px) and (orientation : landscape) {    
    .selector1 { width:960px; }
}
```
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迷失自我

2021-02-07 06:09

Here's an example of how it can be done conditionally without javascript:

//CSS
.visibledevice {display:none;}
.visibledesktop {display:display;}

@media (max-width : 320px) {
    .visibledevice {display:block;}
    .visibledesktop {display:none;}
}

//in the page
<div class="visibledesktop">this displays for desktop and tablet</div>

<div class="visibledevice">this displays for mobile</div>

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