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 - DOMException: Invalid property name on dataset - Stack Overflow

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    javascript - DOMException: Invalid property name on dataset - Stack Overflow

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    I receive "Uncaught DOMException: Failed to set the 'child-count' property on 'DOMStringMap': 'child-count' is not a valid property name." when the following code is executed: 

    elem.dataset['child-count'] = "test";

    where elem is a HTMLElement.

    Thought it is legit to use the '-' character within data-attribute names or am I missing something else?

    I receive "Uncaught DOMException: Failed to set the 'child-count' property on 'DOMStringMap': 'child-count' is not a valid property name." when the following code is executed: 

    elem.dataset['child-count'] = "test";

    where elem is a HTMLElement.

    Thought it is legit to use the '-' character within data-attribute names or am I missing something else?

    • javascript
    • html
    • typescript
    Share Improve this question asked Sep 12, 2016 at 12:15 0xDECAFBAD0xDECAFBAD 6371 gold badge10 silver badges22 bronze badges 1
    • 1 Can you please post your code? – David R Commented Sep 12, 2016 at 12:16
    Add a ment  | 

    1 Answer 1

    Reset to default 20

    The dataset properties are camel-cased: elem.dataset.childCount. They are implicitly transformed to hyphenated attribute names (data-child-count in your case).

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