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center aligning a fixed position div
...r doesn't exactly centers the element.
The proper way is to use CCS3 transform property. Although it's not supported in some old browsers. And we don't even need to set a fixed or relative width.
.centered {
position: fixed;
left: 50%;
transform: translate(-50%, 0);
}
Working jsfiddl...
Biggest GWT Pitfalls? [closed]
...ing GWT (and GWT-EXT) that were unable to be overcome? How about from a performance perspective?
24 Answers
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Container View Controller Examples [closed]
...s in the UIViewController Class Reference . I feel I need a little more information than that and an example implementation would be nice. Google has turned up nothing at all.
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Position Absolute + Scrolling
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transform: translate3d(0,0,0); on the parent will cause position: fixed to become relative to parent. Source coderwall.com/p/2wzj-a/…
– lkraav
Mar 9 at 20:17
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jQuery count child elements
...y modern browsers, adding the element uses findByElement before finding by id or class, which is slower. Soon this will be a moot point either way though, because all DOM searches will be done using one native function. In any case, a simple getElementById('selected') or $('#selected') would be fas...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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创建一个测试数据表，sql如下：
CREATE TABLE users (
id INTEGER PRIMARY KEY,
name TEXT,
age INTEGER);
数据表信息
这时，可以查看一下表信息：
插入数据
往 users 表中插入一条测试数据...
$apply already in progress error
...h more helpful than the one above. I need a solution, not to be admonished for something that might be beyond my control. We have a mixture of angular and legacy code, and they have to interact somehow. It's too expensive to just rewrite all the legacy code...
– Jordan Lapp
...
How to use jQuery to select a dropdown option?
...ttr('selected', true);
example at http://www.jsfiddle.net/gaby/CWvwn/
for modern versions of jquery you should use the .prop() instead of .attr()
$('select>option:eq(3)').prop('selected', true);
example at http://jsfiddle.net/gaby/CWvwn/1763/
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Deleting all records in a database table
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If you are looking for a way to it without SQL you should be able to use delete_all.
Post.delete_all
or with a criteria
Post.delete_all "person_id = 5 AND (category = 'Something' OR category = 'Else')"
See here for more information.
The...
Professional jQuery based Combobox control? [closed]
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Unfortunately, the best thing I have seen is the jquery.combobox, but it doesn't really look like something I'd really want to use in my web applications. I think there are some usability issues with this control, but as a user...