权限没有,则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>javascript - Issues catching the 'Page Down''Page Up' key events - Stack Overflow
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javascript - Issues catching the 'Page Down''Page Up' key events - Stack Overflow

programmeradmin8浏览0评论

I need to catch when the PageUp/PageDown keys are pressed and an element is scrolled, but I've so far been unable to do so. I've tried

Listening for 'keydown' event**: an event triggers when a non-scrolling element is in focus, but when a scrolling element is in focus, no event fires

 $(window).on('keydown', function(e)
 {
    console.log(e.keyCode === 34);
 });

Listening for 'keypress' event**: no event triggers in any context

$(window).on('keypress', function(e)
{
    console.log("keypress"); //does nothing
});

Listening for 'scroll' event**: no event triggers in any context

$(window).scroll(function()
{
    console.log("scrolling"); //does nothing
});

I'm at a loss and I haven't been able to find any clues. I've tried my current code in a jsFiddle, and it works fine, so it must be something more specific.

I need to catch when the PageUp/PageDown keys are pressed and an element is scrolled, but I've so far been unable to do so. I've tried

Listening for 'keydown' event**: an event triggers when a non-scrolling element is in focus, but when a scrolling element is in focus, no event fires

 $(window).on('keydown', function(e)
 {
    console.log(e.keyCode === 34);
 });

Listening for 'keypress' event**: no event triggers in any context

$(window).on('keypress', function(e)
{
    console.log("keypress"); //does nothing
});

Listening for 'scroll' event**: no event triggers in any context

$(window).scroll(function()
{
    console.log("scrolling"); //does nothing
});

I'm at a loss and I haven't been able to find any clues. I've tried my current code in a jsFiddle, and it works fine, so it must be something more specific.

Share Improve this question edited Nov 16, 2015 at 17:13 DanTheMan asked Nov 16, 2015 at 16:09 DanTheManDanTheMan 5562 gold badges7 silver badges21 bronze badges 1
  • Forgot to include the brackets in the question, but they're there in the code. – DanTheMan Commented Nov 16, 2015 at 17:05
Add a ment  | 

4 Answers 4

Reset to default 3

instead of window try to use document so it will consider current document on web page.

in your code there is bracket miss match.

 $(document).ready(function(){
     $(document).keypress(function(e){
      if(e.keyCode === 34){
         console.log('page down')
        }

    });
 

    $(document).keypress(function(e){
       console.log("keypress"); //console will print
    });
});
<script src="https://ajax.googleapis./ajax/libs/jquery/1.11.3/jquery.min.js"></script>

hope this will work for you.

Can you try also ?

$(window).bind('keydown', function(event) {
  console.log(event.which === 33) });

The event.which property returns which keyboard key or mouse button was pressed for the event

Actually your syntax is incorrect you are missing a closing ) at the end of your function, you should write:

$(window).on('keydown', function(e) {
  console.log(e.keyCode === 34);
});

$(window).on('keypress', function(e) {
  console.log("keypress"); //does nothing
});

$(window).scroll(function() {
  console.log("scrolling"); //does nothing
});
#scroll {
  max-height: 100px;
  height: 100px;
}
<script src="https://ajax.googleapis./ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<div id="scroll">

  <br>fghfjkjgfj
  <br/>dfdfdfdf
  <br/>dfdsf
  <br/>
  <br/>
  <br/>dfdfdf
  <br/>
  <br/>
  <br/>ssdsds
  <br/>fdf
  <br/>
  <br/>
  <br/>
  <br/>fgfgfg
  <br/>End
</div>

And everything, will work as expected.

So the element I'm trying to scroll on is a SlickGrid table, and it has its own scrolling event.

So I wrote, based on their docs:

this.grid.onScroll.subscribe(function(e, args)
{
    console.log(e);
}

Now it is triggering on Page Down / Page Up key-presses.

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