te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Using Media Queries To Only Include JS Files On Mobile - Stack Overflow

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    javascript - Using Media Queries To Only Include JS Files On Mobile - Stack Overflow

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    I am trying to use the media attribute to only link my javascript files on to mobile devices, not on desktop ones.

    Here's my link tag:

    <script type="text/javascript" media="screen and (max-width : 850px)" src="mobile.js"></script>

    But this isn't working, it links to JS to everything.

    How do I only link a JS file if it meets those query conditions?

    If I can't how do I only run JS if it is on mobile?

    I am trying to use the media attribute to only link my javascript files on to mobile devices, not on desktop ones.

    Here's my link tag:

    <script type="text/javascript" media="screen and (max-width : 850px)" src="mobile.js"></script>

    But this isn't working, it links to JS to everything.

    How do I only link a JS file if it meets those query conditions?

    If I can't how do I only run JS if it is on mobile?

    • javascript
    • css
    • mobile
    Share Improve this question asked Sep 22, 2013 at 17:02 Joshua SoileauJoshua Soileau 3,0159 gold badges43 silver badges52 bronze badges
    Add a ment  | 

    3 Answers 3

    Reset to default 11

    How about using javascript for that?

    <script type="text/javascript">

if (screen.width < 980) { 

    document.write('<script type="text/javascript" src="mobile.js"></script>');  
 } 

</script>

    There are two ways you can do this:

    1. Have all of your scripts on the page already and invoke them when the breakpoints are triggered
    2. Load your scripts only when they are needed, once a breakpoint is met

    Either way, you will need this:

    enquire.js

    This will allow you to add media queries callbacks for js.

    Light weight and works everywhere w/o the overhead. 

    if (document.documentElement.clientWidth < 900) {   // scripts }

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