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

Installing and managing 3rd party libraries in the client of a Django project can be a bit tricky. This section provides a step-by-step guide on how to install and manage 3rd party libraries used by the client side of Weblate using Webpack.

Prerequisites

Before proceeding with an installation, make sure you have the following prerequisites:

  • Nodejs version 14 or higher.

  • The yarn package manager is installed on your system.

  • Run cd client.

  • Run yarn install

Installation

To install a library, first run the following command:

yarn add <lib-name>

Importing the Library

Then, there are two ways to import the library:

  1. If it is a project-wide library (it is used/needed in all/most pages):

    • Import the library in src/main.js.

    • And declare it in the global scope (if needed).

  2. If it is page-specific library (library is used in a specific page or template):

    • Create a new file named src/<lib-name>.js.

    • Import the library in it. Then inject it into the window object to be globally accessible.

    • Add an entry in webpack.config.js: <lib-name>: "src/<lib-name>.js".

    • Add library name in excludePrefixes array in mainLicenseTransform in webpack.config.js.

    • Add license file name in additionalFiles in LicensePlugin in plugins array in webpack.config.js.

    • Create a <lib-name>LicenseTransfrom function for the license file introduced in the previous steps and use it.

    Note: Replace <lib-name> with the actual name of the 3rd party library.

Building the Library

Build the libraries used by the project, by running the following command:

yarn build

Including the Library

Now the library is built and ready for use. To include it follow these steps:

  1. If the library was imported in src/main.js, no further steps are required (as it is already included in base.html).

  2. If the library was imported in its specific file src/<lib-name>.js, in weblate/templates use the include tags to link to the built static JavaScript file:

{% load static %}
<script src="{% static 'js/vendor/<lib-name>.js' %}"></script>

Coding style

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

Localization

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'

See also

Translation topic in the Django documentation

Icons

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.