Using HTML in Wiki Text

Trac supports inserting HTML into any wiki context, accomplished using the HTML WikiProcessor.

HTML support is built-in, and does not require installing any additional packages.

How to Use HTML

To inform the wiki engine that a block of text should be treated as HTML, use the html processor.

This example should explain: 

{{{
#!html
<h1 style="text-align: right; color: blue">HTML Test</h1>
}}}

Results in:

HTML Test

Note that Trac sanitizes your HTML code before displaying it. That means that if you try to use potentially dangerous constructs such as Javascript event handlers, those will be removed from the output.

Since 0.11, the filtering is done by Genshi, and as such, the produced output will be a well-formed fragment of HTML. In other words, this mean that you can no longer use two HTML blocks, one for opening a <div>, the second for closing it, in order to wrap arbitrary wiki text. The new way to wrap any wiki content inside a <div> is to use the div Wiki processor: 

{{{
#!div class=important style="border: 2pt solid; text-align: center"
This is the ''only'' way to go in Trac 0.11
}}}

Results in:

This is the only way to go in Trac 0.11

Note that if you don't specify a CSS class, the wikipage class will be added, so that the special layout of headers is respected in the <div>. If you specify explicitly the padding property, you have to take this into account (tip:  get FireBug!).

For spans, you should rather use the Macro call syntax: 

 Hello [[span(''WORLD'' (click [#world-anchor here]), style=color: green; font-size: 120%, id=world-anchor)]]!

Results in:

Hello WORLD (click here)!

Images

If you want display an image inline, append the following: ?format=raw after the file name. For example, to display the Trac logo inline, use this syntax: 

 <img src="http://www.edgewall.org/gfx/trac_logo.png?format=raw" />

More Information

See also: WikiProcessors, WikiFormatting, WikiRestructuredText