Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
535 views
in Technique[技术] by (71.8m points)

firefox - html doctype adds whitespace?

can someone please explain to me why having a doctype of

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

and

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN">

render the following block differently under firefox?

<table style="border-collapse:collapse; margin:0; padding:0;">
    <tr>
        <td style="border:1px solid red; margin:0; padding:0;"><img src="http://images.smh.com.au/2010/06/01/1533814/th_park-90x60.jpg" style="border:none; padding:0; margin:0;" /></td>
    </tr>
</table>

using 'Transitional', there is no white space below the image, using 'Strict' there is!

2nd question, using strict, is it at all possible to remove this whitespace?

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

As you can see in this table, the first Doctype triggers quirks mode in all browsers, the second will trigger standards mode.

The rest of this story is continued at Images, Tables, and Mysterious Gaps:

Setting images to be blocks

The first choice, and one that will work for most graphically-intense designs, is to convert the image from being an inline element to a block-level element. Do that, and it no longer generates a line box, and so the problem goes away-- assuming that the image is the only thing that occupies that table cell. In the simplest case, we might add a style like this:

td img {display: block;}

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...