$cache[$key] = empty($arr) ? NULL : $arr; return $cache[$key]; } // 门户 获取需要在频道显示的栏目主题数据 function portal_channel_thread($fid) { global $forumlist; if (empty($fid)) return NULL; $orderby = array('tid' => 1); $page = 1; // 遍历所有在频道显示内容的栏目 $category_forumlist = channel_category($fid); $arrlist = array(); $forum_tids = array(); $tidlist = array(); if ($category_forumlist) { foreach ($category_forumlist as &$_forum) { // 频道显示数据 $arrlist['list'][$_forum['fid']] = array( 'fid' => $_forum['fid'], 'name' => $_forum['name'], 'rank' => $_forum['rank'], 'type' => $_forum['type'], 'url' => $_forum['url'], 'channel_new' => $_forum['channel_new'], ); $forum_thread = thread_tid__find(array('fid' => $_forum['fid']), $orderby, $page, $_forum['channel_new'], 'tid', array('tid')); // 最新信息按栏目分组 foreach ($forum_thread as $key => $_thread) { $forum_tids[$key] = $_thread; } unset($forum_thread); } $tidlist += $forum_tids; } unset($category_forumlist); // 获取属性对应的tid集合 list($flaglist, $flagtids) = flag_thread_by_fid($fid); empty($flagtids) || $tidlist += $flagtids; unset($flagtids); // 频道置顶 $stickylist = sticky_list_thread($fid); empty($stickylist) || $tidlist += $stickylist; // 在这之前合并所有二维数组 tid值为键/array('tid值' => tid值) $tidarr = arrlist_values($tidlist, 'tid'); // 在这之前使用$tidarr = array_merge($tidarr, $arr)前合并所有一维数组 tid/array(1,2,3) if (empty($tidarr)) { $arrlist['list'] = isset($arrlist['list']) ? array_multisort_key($arrlist['list'], 'rank', FALSE, 'fid') : array(); return $arrlist; } $tidarr = array_unique($tidarr); $pagesize = count($tidarr); // 遍历获取的所有tid主题 $threadlist = well_thread_find_asc($tidarr, $pagesize); // 遍历时为升序，翻转为降序 $threadlist = array_reverse($threadlist); foreach ($threadlist as &$_thread) { // 各栏目最新内容 isset($forum_tids[$_thread['tid']]) AND $arrlist['list'][$_thread['fid']]['news'][$_thread['tid']] = $_thread; // 全站置顶内容 isset($stickylist[$_thread['tid']]) AND $arrlist['sticky'][$_thread['tid']] = $_thread; // 首页属性主题 if (!empty($flaglist)) { foreach ($flaglist as $key => $val) { if (isset($val['tids']) && in_array($_thread['tid'], $val['tids'])) { $arrlist['flaglist'][$key][array_search($_thread['tid'], $val['tids'])] = $_thread; ksort($arrlist['flaglist'][$key]); $arrlist['flag'][$_thread['tid']] = $_thread; } } } } unset($threadlist); if (isset($arrlist['sticky'])) { $i = 0; foreach ($arrlist['sticky'] as &$val) { ++$i; $val['i'] = $i; } } if (isset($arrlist['flag'])) { $i = 0; foreach ($arrlist['flag'] as &$val) { ++$i; $val['i'] = $i; } } if (isset($arrlist['flaglist'])) { foreach ($arrlist['flaglist'] as &$val) { $i = 0; foreach ($val as &$v) { ++$i; $v['i'] = $i; } } } isset($arrlist['list']) AND $arrlist['list'] = array_multisort_key($arrlist['list'], 'rank', FALSE, 'fid'); return $arrlist; } ?>javascript - Append some HTML into the HEAD tag? - Stack Overflow

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    javascript - Append some HTML into the HEAD tag? - Stack Overflow

    programmeradmin0浏览0评论

    I want to add some style to head tag in html page using javascript.

    var h = document.getElementsByTagName('head').item(0);
h.innerHTML += '<style>a{font-size:100px;}</style>';

    But when I run this code in IE8 I see this error message: Could not set the innerHTML property. Invalid target element for this operation.

    Any ideas?

    I want to add some style to head tag in html page using javascript.

    var h = document.getElementsByTagName('head').item(0);
h.innerHTML += '<style>a{font-size:100px;}</style>';

    But when I run this code in IE8 I see this error message: Could not set the innerHTML property. Invalid target element for this operation.

    Any ideas?

    • javascript
    • html
    • header
    Share Improve this question asked Apr 20, 2010 at 15:21 Aleksandr IvanovAleksandr Ivanov 2,7865 gold badges27 silver badges35 bronze badges 1
    • 2 Apart from the issue with IE not liking to set innerHTML on various elements like <head>: don't ever use innerHTML+=. You'd be serialising all the nodes inside the head element to HTML, adding a string and then parsing them back, losing all non-serialisable content in the process. This is always to be avoided. – bobince Commented Apr 20, 2010 at 15:30
    Add a comment  | 

    2 Answers 2

    Reset to default 14

    Create the style element with createElement:

    var h = document.getElementsByTagName('head').item(0);
var s = document.createElement("style");
s.type = "text/css"; 
s.appendChild(document.createTextNode("a{font-size:100px;}"));
h.appendChild(s);

    you can try: 

    let header = document.querySelector('head')
let newElement = document.createElement('p')
newElement.style.color = "lime"
newElement.style.fontSize = ".5rem"
header.append(newElement)

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