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DjVu.js is a program library for working with .djvu files online without any connection with the server. DjVu.js Viewer is a widget that allows viewing .djvu files right in the browser and can be easily embedded into any web page.

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DjVu.js

About / О проекте

DjVu.js is a program library for working with .djvu online. It's written in JavaScript and can be run in a web browser without any connection with a server. DjVu.js can be used for splitting (and concatenation) of .djvu files, rendering pages of a .djvu document, converting (and compressing) images into .djvu documents and for analyzing of metadata of .djvu documents.

DjVu.js Viewer is an app which uses DjVu.js to render DjVu documents. The app may be easily included into any html page. You can look at it and try it out on the official website (the link is below).

DjVu.js Viewer browser extension. By and large, it's a copy of the viewer, but also it allows opening links to .djvu files right in the browser without downloading them explicitly. The links to the extension are below.


DjVu.js - это программная библиотека написанная на JavaScript и предназначенная для работы с файлами формата .djvu онлайн. DjVu.js ориентирована на исполнение в браузере пользователя без связи с сервером. Библиотека может быть использована для разделения (объединения) файлов .djvu, преобразования картинок в документы .djvu, отрисовки страниц документов .djvu, а также для анализа мета данных и структуры .djvu документов.

DjVu.js Viewer - приложение, которое можно легко встроить в любую html-страницу. Данное приложение служит для просмотра документов DjVu непосредственно в браузере. Вы можете ознакомиться с ним по ссылке ниже.

Расширение для браузера DjVu.js Viewer. По большей части это копия приложения DjVu.js Viewer, однако также расширение позволяет открывать ссылки на .djvu файлы прямо в браузере, не скачивая их явно. Ссылки на расширение доступны ниже.

Translation (localization)

If you want to add a new translation to the viewer read here how to do it.

How to build it

You need to have Node.js 16+ and npm 8+ installed. Clone the repo and run:

npm run install
npm run build

in the root folder of the repository. The command will install all dependencies and create bundles of the library and viewer (the build folder should appear).

Also, there is another way to do the same operations:

npm run make

The command will clean all git-ignored files, install all the dependencies and build the library and viewer. However, you should have git installed and the repository should have the .git folder (there is no one in the source code uploaded to the browser extensions websites).

How to start the viewer in the dev mode

You have to build the library once. You can achieve it via npm run make. Then you can start the viewer:

cd viewer
npm start

How to pack the extension

After the two commands above are executed (install and build), the extension folder will contain all the necessary files, that is to say, the folder is an unpacked extension. If you want to pack the extension, you should have the web-ext module installed globally, to wit, npm install web-ext -g, and then just change the directory:

cd extension

and run

web-ext build

and the packed version of the extension will appear in the extension folder.

If you have some problems, read the technical documentation or create an issue. Also, you can download the library from the official website. (All links are below).

Links

License / Лицензия

The DjVu.js Library is distributed under the terms of GNU GPL v2. Everything else in this repository (including the DjVu.js Viewer and the browser extension) is under The Unlicense. Read more in the LICENSE file.


Библиотека DjVu.js распространяется под лицензией GNU GPL v2. Все остальное в этом репозитории (включая DjVu.js Viewer и расширение для браузера) является общественным достоянием (The Unlicense). Читайте подробнее в файле лицензии.

About

DjVu.js is a program library for working with .djvu files online without any connection with the server. DjVu.js Viewer is a widget that allows viewing .djvu files right in the browser and can be easily embedded into any web page.

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