There's nothing special about CSS in CKAN, once you've got started with editing CSS in CKAN (by following the tutorial below), then you just use the usual tools and techniques to explore and hack the CSS. We recommend using your browser's web development tools to explore and experiment with the CSS, then using any good text editor to edit your extension's CSS files as needed. For example:
- Firefox developer tools
These include a Page Inspector and a Style Editor
- Firebug
Another web development toolkit for Firefox
- Chrome developer tools
Tools for inspecting and editing CSS in Google Chrome
- Mozilla Developer Network's CSS section
A good collection of CSS documentation and tutorials
Extensions can add their own CSS files to modify or extend CKAN's default CSS. Create an example_theme.css
file in your extension's public
directory:
ckanext-example_theme/
ckanext/
example_theme/
public/
example_theme.css
Add this CSS into the example_theme.css
file, to change the color of CKAN's "account masthead" (the bar across the top of the site that shows the logged-in user's account info):
/../ckanext/example_theme/v13_custom_css/public/example_theme.css
If you restart the development web server you should be able to open this file at http://127.0.0.1:5000/example_theme.css in a web browser.
To make CKAN use our custom CSS we need to override the base.html
template, this is the base template which the templates for all CKAN pages extend, so if we include a CSS file in this base template then the file will be included in every page of your CKAN site. Create the file:
ckanext-example_theme/
ckanext/
example_theme/
templates/
base.html
and put this Jinja code in it:
/../ckanext/example_theme/v13_custom_css/templates/base.html
The default base.html
template defines a styles
block which can be extended to link to custom CSS files (any code in the styles block will appear in the <head>
of the HTML page).
Restart the development web server and reload the CKAN page in your browser, and you should see the background color of the account masthead change:
This custom color should appear on all pages of your CKAN site.
Now that we have CKAN using our CSS file, we can add more CSS rules to the file and customize CKAN's CSS as much as we want. Let's add a bit more code to our example_theme.css
file. This CSS implements a partial imitation of the datahub.io theme (circa 2013):
/../ckanext/example_theme/v14_more_custom_css/public/example_theme.css