Weblate frontend

The frontend is currently built using Bootstrap, jQuery and few third party libraries.

Supported browsers

Weblate supports the latest, stable releases of all major browsers and platforms.

Alternative browsers which use the latest version of WebKit, Blink, or Gecko, whether directly or via the platform’s web view API, are not explicitly supported. However, Weblate should (in most cases) display and function correctly in these browsers as well.

Older browsers might work, but some features might be limited.

Dependency management

The yarn package manager is used to update third party libraries. The configuration lives in scripts/yarn and there is a wrapper script scripts/yarn-update to upgrade the libraries, build them and copy to correct locations in weblate/static/vendor, where all third partly frontend code is located. The Weblate specific code should be placed directly in weblate/static or feature specific subdirectories (for example weblate/static/editor).

Adding new third-party library typically consists of:

# Add a yarn package
yarn --cwd scripts/yarn add PACKAGE
# Edit the script to copy package to the static folder
edit scripts/yarn-update
# Run the update script
# Add files to git
git add .

Coding style

Weblate relies on Prettier for the code formatting for CSS files and Biome for formatting and linting the JavaScript code.


Should you need any user visible text in the frontend code, it should be localizable. In most cases all you need is to wrap your text inside gettext function, but there are more complex features available:

document.write(gettext('this is to be translated'));

var object_count = 1 // or 0, or 2, or 3, ...
s = ngettext('literal for the singular case',
        'literal for the plural case', object_count);

fmts = ngettext('There is %s object. Remaining: %s',
        'There are %s objects. Remaining: %s', 11);
s = interpolate(fmts, [11, 20]);
// s is 'There are 11 objects. Remaining: 20'


Weblate currently uses material design icons. In case you are looking for new symbol, check Material Design Icons or Material Design Resources.

Additionally, there is scripts/optimize-svg to reduce size of the SVG as most of the icons are embedded inside the HTML to allow styling of the paths.