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; } ?>browser - Print from frontend javascript? - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>browser - Print from frontend javascript? - Stack Overflow

    browser - Print from frontend javascript? - Stack Overflow

    programmeradmin4浏览0评论

    Is it possible to print something with a printer with javascript in the browser?

    I want to print a receipt number, so if it's possible, what is the fastest printer so when the user clicks on a button it will print out eg. "1234" on a small paper.

    Thanks

    Is it possible to print something with a printer with javascript in the browser?

    I want to print a receipt number, so if it's possible, what is the fastest printer so when the user clicks on a button it will print out eg. "1234" on a small paper.

    Thanks

    • javascript
    • browser
    • printing
    • frontend
    Share Improve this question asked Mar 7, 2011 at 13:25 ajsieajsie 79.8k110 gold badges284 silver badges386 bronze badges
    Add a ment  | 

    2 Answers 2

    Reset to default 11

    You can't access the printer directly from Javascript but you can call window.print() which will initiate the standard browser print behaviour. Using this, you could try two techniques to achieve what you're after:

    Just before calling window.print() inject a dynamic print stylesheet that only shows the elements with the text you're wanting to print. You would need to be careful to cleanup any previous print stylesheets. Or in fact you could just use an element <div id="printable"> which is the only visible element in your print stylesheet and insert any text to be printed in that. (Just be mindful if this is a website which users may actually want to print)

    It's also possible to call print() directly on an iframe window, which you could populate with your desired text. For example:

    var iframe = document.createElement('iframe');

iframe.onload = function() {
    var doc = iframe.contentDocument ? iframe.contentDocument : iframe.contentWindow.document;
    doc.getElementsByTagName('body')[0].innerHTML = "<p>1234</p>";

    iframe.contentWindow.focus(); // This is key, the iframe must have focus first
    iframe.contentWindow.print();
}

document.getElementsByTagName('body')[0].appendChild(iframe);

    You can't access print settings from within the browser.

    This is due to security considerations, otherwise printers worldwide would be printing non-stop.

    The only thing you can do regarding printing in javascript in call window.print();.

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论