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 - uncaught TypeError: Cannot read property 'classList' of null - Stack Overflow
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javascript - uncaught TypeError: Cannot read property 'classList' of null - Stack Overflow

programmeradmin5浏览0评论

Hi Im trying to make a shrinking header, I almost have it working however i keep getting the above error for this section of the js files

var cbpAnimatedHeader = (function() {

var docElem = document.documentElement,
    header = document.querySelector( '.cbp-af-header' ),
    didScroll = false,
    changeHeaderOn = 300;

function init() {
    window.addEventListener( 'scroll', function( event ) {
        if( !didScroll ) {
            didScroll = true;
            setTimeout( scrollPage, 250 );
        }
    }, false );
}

function scrollPage() {
        var sy = scrollY();
        if ( sy >= changeHeaderOn ) {
            var windowtab = $(window).width();
            if (windowtab >= 1021)
            {
            classie.add( header, 'cbp-af-header-shrink' );
            }
        }
        else {
            classie.remove( header, 'cbp-af-header-shrink' );
        }
        didScroll = false;
}

function scrollY() {
    return window.pageYOffset || docElem.scrollTop;
}

init();
})();

and

var classie = {
// full names
 hasClass: hasClass,
addClass: addClass,
removeClass: removeClass,
toggleClass: toggleClass,
 // short names
has: hasClass,
 add: addClass,
remove: removeClass,
toggle: toggleClass
};

I had it working in DNN when I add a module for the jQuery however when I had it to the skin, I end up with the above console error

Hi Im trying to make a shrinking header, I almost have it working however i keep getting the above error for this section of the js files

var cbpAnimatedHeader = (function() {

var docElem = document.documentElement,
    header = document.querySelector( '.cbp-af-header' ),
    didScroll = false,
    changeHeaderOn = 300;

function init() {
    window.addEventListener( 'scroll', function( event ) {
        if( !didScroll ) {
            didScroll = true;
            setTimeout( scrollPage, 250 );
        }
    }, false );
}

function scrollPage() {
        var sy = scrollY();
        if ( sy >= changeHeaderOn ) {
            var windowtab = $(window).width();
            if (windowtab >= 1021)
            {
            classie.add( header, 'cbp-af-header-shrink' );
            }
        }
        else {
            classie.remove( header, 'cbp-af-header-shrink' );
        }
        didScroll = false;
}

function scrollY() {
    return window.pageYOffset || docElem.scrollTop;
}

init();
})();

and

var classie = {
// full names
 hasClass: hasClass,
addClass: addClass,
removeClass: removeClass,
toggleClass: toggleClass,
 // short names
has: hasClass,
 add: addClass,
remove: removeClass,
toggle: toggleClass
};

I had it working in DNN when I add a module for the jQuery however when I had it to the skin, I end up with the above console error

Share Improve this question asked Nov 17, 2014 at 10:28 user3182518user3182518 2274 gold badges6 silver badges14 bronze badges 5
  • If you're including jQuery, why not use jQuery everywhere else? Where does this error e from? (it's not directly from any of the code you posted). Is it from jQuery? – h2ooooooo Commented Nov 17, 2014 at 10:29
  • 1 There's no 'classList' anywhere in the above code... where is it throwing? – Will Jenkins Commented Nov 17, 2014 at 10:31
  • Can you make a fiddle ? – Der Vampyr Commented Nov 17, 2014 at 10:33
  • 1 We can't help if you don't show the code where the error occurs, but at a guess, looking at what you did provide, header is null because as of when you do the header = document.querySelector( '.cbp-af-header' ) line, there is no matching element in the document. (Perhaps you need to move the script to the end of the page.) – T.J. Crowder Commented Nov 17, 2014 at 10:33
  • @T.J.Crowder Thanks for your ment. Moving all JS script to the end of the page; is the solution. – egyamado Commented Feb 2, 2015 at 7:12
Add a ment  | 

2 Answers 2

Reset to default 3

This line in the script:

header = document.querySelector('.cbp-af-header')

@ MDN for document.querySelector()

it says that, the first element in the document with the class is returned.


So may be you are looking for .querySelectorAll("selector/s"):

document.querySelectorAll(".cbp-af-header");

@ MDN for document.querySelectorAll()

returns a list of all elements (div in case) supplied within the document.

I encountered the same problem. I realized that IIFE was executed before the DOM was pletely loaded. If you are use jQuery, try wrapping it in $(document).ready()

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