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 - Centering the placeholder caret in contentEditable element - Stack Overflow

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    javascript - Centering the placeholder caret in contentEditable element - Stack Overflow

    programmeradmin3浏览0评论

    I have the following: /. 

    [contentEditable=true]:empty::before{
  content:attr(data-ph);
  color: #CCC;
  text-align: center;
}

h1 {
  text-align: center;
}
    <h1 contenteditable="true" data-ph="Name"></h1>

    I have the following: http://jsfiddle/mb76koj3/. 

    [contentEditable=true]:empty::before{
  content:attr(data-ph);
  color: #CCC;
  text-align: center;
}

h1 {
  text-align: center;
}
    <h1 contenteditable="true" data-ph="Name"></h1>

    The problem is the <h1> is centered, but the placeholder caret isn't centered (until you start typing). The caret is on the left side, how can I change this?

    • javascript
    • html
    • css
    • contenteditable
    Share Improve this question edited Mar 26, 2015 at 22:50 Hashem Qolami 99.5k27 gold badges155 silver badges165 bronze badges asked Mar 26, 2015 at 21:14 MuhambiMuhambi 3,5226 gold badges33 silver badges56 bronze badges 1
    • Interestingly, in IE11 the cursor starts at the end of the content, Chrome and Firefox render it left-aligned. Chrome also shows a blue border where the other two do not. – adamdc78 Commented Mar 26, 2015 at 21:20
    Add a ment  | 

    3 Answers 3

    Reset to default 10

    Not an ideal solution but we can fake the effect by applying a padding-left of 50% to the :empty element to make the cursor appear at the middle.

    And then align the placeholder (the pseudo-element) at the middle by using absolute positioning and a negative value of translateX transform function.

    * {
  margin: 0;
  padding: 0;
}

@-moz-document url-prefix() { /* CSS Hack to fix the position of cursor on FF */
  [contentEditable=true]:empty {
    padding-top: 1em;
    padding-bottom: .25em;
    -moz-box-sizing: content-box;
  }
}

[contentEditable=true]:empty {
  padding-left: 50%;
  text-align: left; /* Fix the issue on IE */
}

[contentEditable=true]:empty::before{
  content:attr(data-ph);
  color: #CCC;
  position: absolute;
  top: 0;
  left: 50%;
  -webkit-transform: translateX(-50%);
  -moz-transform:  translateX(-50%);
  -ms-transform:  translateX(-50%);
  -o-transform:  translateX(-50%);
  transform:  translateX(-50%);
}

h1 {
  text-align: center;
  position: relative;
}
    <h1 contenteditable="true" data-ph="Name"></h1>

    The only problem that remains — as can be seen in the OP's provided code — is that on Firefox, an empty <br> element is appended to contentEditable elements which causes :empty pseudo-class not matching the element anymore. Hence the placeholder won't be restored.

    However since the question is about the position of the cursor, I assume this behavior is just fine for the OP.

    After looking at Hashem Qolami's answer, I came up with this:

    [contentEditable=true]:empty {
    padding-left: 50%;
}

[contentEditable=true]:empty::before{
    content:attr(data-ph);
    color: #CCC;
    text-align: center;
    margin-left: -100%;
}

h1 {
    text-align: center;
}
    <h1 contenteditable="true" data-ph="Name"></h1>

    However, adamdc78 discovered 2 problems:

    • In IE11, the cursor appears after the placeholder.
    • In Firefox, the placeholder is not restored after typing and emptying.

    At this time, I can't figure out how to solve that.

    This bug has been reported in 2020, but still not fixed. You can vote at : https://bugzilla.mozilla/show_bug.cgi?id=1625298

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