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 - Angular 2. How to detect if component is currently in viewport - Stack Overflow

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    I'd like to detect if the ponent position. Is currently in a view port and if yes run the trigger which stats an animation on this particular ponent.

    I can't find any "angular" way to do it.

    Example app( main ponent) every div is a separate ponent of app:

    <div id="one">ww</div>
<div id="two">aa</div>
<div id="three">rr</div>
<div id="four">asf</div>
<div id="five">Something...</div>
<div id="six">rq</div>

    So... I'd like to detect when ponent five is in viewport (present on a screen) and start animate that ponent.

    Any ideas?

    Thanks

    I'd like to detect if the ponent position. Is currently in a view port and if yes run the trigger which stats an animation on this particular ponent.

    I can't find any "angular" way to do it.

    Example app( main ponent) every div is a separate ponent of app:

    <div id="one">ww</div>
<div id="two">aa</div>
<div id="three">rr</div>
<div id="four">asf</div>
<div id="five">Something...</div>
<div id="six">rq</div>

    So... I'd like to detect when ponent five is in viewport (present on a screen) and start animate that ponent.

    Any ideas?

    Thanks

    • javascript
    • angular
    • animation
    • dom
    • typescript
    Share Improve this question asked Dec 23, 2016 at 13:28 RadekRadek 2411 gold badge4 silver badges9 bronze badges 1
    • 1 I don't want to start animation when ponent is fully initialised. I'd like to start animation when this ponent appear in a viewport. E.i. you scroll website and if ponent which initially was out of viewport appear in a viewport – Radek Commented Dec 23, 2016 at 14:31
    Add a ment  | 

    1 Answer 1

    Reset to default 11

    You could use the ng-in-viewport plugin.

    HTML:

    <div id="five" in-viewport (inViewportAction)="action($event)">Something...</div>

    Component:

    action(event : any){
    if(event.value){
       //Do something here (e.g apply CSS class to start the animation)
    }
}

    Check my detailed answer on a similar question here.

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