It's a presentation framework based on the power of CSS3 transforms and transitions in modern browsers and inspired by the idea behind prezi.com.

WARNING

impress.js may not help you if you have nothing interesting to say ;)

Check out our new Getting Started guide if you want a quick introduction to the project!

You can include this link directly inside of your HTML file in its header. If you want to learn how to do this, you can find a how-to in the Getting Started guide.

• V2.0.0: https://cdn.jsdelivr.net/gh/impress/[email protected]/js/impress.js
• V1.1.0: https://cdn.jsdelivr.net/gh/impress/[email protected]/js/impress.js
• Source: https://cdn.jsdelivr.net/gh/impress/impress.js/js/impress.js

Check out our new Getting Started guide if you want a quick introduction to the project!

git clone --recursive https://github.com/impress/impress.js.git
cd impress.js

Note: For a minimal checkout, omit the --recursive option. This will leave out extra plugins.

Stable releases

New features and fixes are continuously merged into the master branch, which is what the above command will check out. For the latest stable release, see the Github Releases page.

Reference documentation of core impress.js features and API you can find it in DOCUMENTATION.md.

The HTML source code of the official impress.js demo serves as a good example usage and contains comments explaining various features of impress.js. For more information about styling you can look into CSS code which shows how classes provided by impress.js can be used. Last but not least JavaScript code of impress.js has some useful comments if you are interested in how everything works. Feel free to explore!

impress.js demo by @bartaz

The Classic Slides demo is targeted towards beginners, or can be used as a template for presentations that look like the traditional PowerPoint slide deck. Over time, it also grew into the example presentation that uses most of the features and addons available.

More examples and demos can be found on Examples and demos wiki page.

Feel free to add your own example presentations (or websites) there.

If you want to learn even more there is a list of tutorials and other learning resources on the wiki, too.

There is also a book available about Building impressive presentations with impress.js by Rakhitha Nimesh Ratnayake.

You may want to check out the sibling project Impressionist: a 3D GUI editor that can help you in creating impress.js presentations.

You're welcome to ask impress.js related questions on the impressionist-presentations mailing list.

• index.html: This is the official impress.js demo, showcasing all of the features of the original impress.js, as well as some new plugins as we add them.
  • As already mentioned, this file is well commented and acts as the official tutorial.
• examples/: Contains several demos showcasing additional features available.
  • Classic Slides is a simple demo that you can use as template if you want to create very simple, rectangular, PowerPoint-like presentations.
• src/: The main file is src/impress.js. Additional functionality is implemented as plugins in src/plugins/.
  • See src/plugins/README.md for information about the plugin API and how to write plugins.
• test/: Contains QUnit and Syn libraries that we use for writing tests, as well as some test coverage for core functionality. (Yes, more tests are much welcome.) Tests for plugins are in the directory of each plugin.
• js/: Contains js/impress.js, which contains a concatenation of the core src/impress.js and all the plugins. Traditionally this is the file that you'll link to in a browser. In fact both the demo and test files do exactly that.
• css/: Contains a CSS file used by the demo. This file is not required for using impress.js in your own presentations. Impress.js creates the CSS it needs dynamically.
• extras/ contains plugins that for various reasons aren't enabled by default. You have to explicitly add them with their own script element to use them.
• build.js: Simple build file that creates js/impress.js. It also creates a minified version impress.min.js, but that one is not included in the github repository.
• package.json: An NPM package specification. This was mainly added so you can easily install buildify and run node build.js. Other than the build process, which is really just doing roughly cat src/impress.js src/plugins/*/*.js > js/impress.js, and testing, impress.js itself doesn't depend on Node or any NPM modules.

For developers, once you've made changes to the code, you should run these commands for testing:

npm install
npm run all

Note that running firefox qunit_test_runner.html is usually more informative than running karma with npm run test. They both run the same tests.

More info about the src/ directory can be found in src/plugins/README.md.

• >= node 7.6
• npm

impress.js name is courtesy of @skuzniak.

It's an (un)fortunate coincidence that an Open/LibreOffice presentation tool is called Impress ;)

See the Reference API

The design goal for impress.js has been to showcase awesome CSS3 features as found in modern browser versions. We also use some new DOM functionality, and specifically do not use jQuery or any other JavaScript libraries, nor our own functions, to support older browsers. In general, recent versions of Firefox and Chrome are known to work well. Reportedly IE now works too.

The typical use case for impress.js is to create presentations that you present from your own laptop, with a browser version you know works well. Some people also use impress.js successfully to embed animations or presentations in a web page, however, be aware that in this some of your visitors may not see the presentation correctly, or at all.

In particular, impress.js makes use of the following JS and CSS features:

• DataSet API
• ClassList API
• CSS 3D Transforms
• CSS Transitions

Copyright 2011-2012 Bartek Szopka (@bartaz), 2016-2023 Henrik Ingo (@henrikingo) and 70 other contributors

Released under the MIT License