In order to make a game using friGame you will need an HTML document that includes in this order:

  • frigame.css

  • Depending on the backend, eventually the backend specific required files

  • frigame.common.js (Common functions shared across all backends)

  • The frigame backend specific file (frigame.dom.js, frigame.canvas.js, frigame.webgl.js)

  • The game source files

In the HTML document there is also a div element, normally with id=”playground”, styled in order to have a fixed width and height.

Example HTML document:

<!DOCTYPE html>

        <link rel="stylesheet" type="text/css" href="frigame.css" />
        <div id="playground" style="width: 700px; height: 250px; margin: 0; padding: 0"></div>

        <script type="text/javascript" src="frigame.common.js"></script>
        <script type="text/javascript" src="frigame.canvas.js"></script>
        <script type="text/javascript" src="frigame.domready.js"></script>
        <script type="text/javascript" src="the_game.js"></script>

Backend specific requirements


The DOM backend relies on jQuery and the Modernizr feature detection library, in order to provide cross-browser compatibility.

If you want to build a custom version of Modernizr, be sure to include the tests for:

  • canvas

  • svg

  • css backgroundblendmode

  • css backgroundsize

  • css borderradius

  • css gradients

  • css mask

  • css opacity

  • css rgba

  • css transforms

  • prefixed

  • prefixedCSSValue

For older browsers that do not support the window.btoa method, make sure to include the base64.js file too.

HTML5 <canvas>

The HTML5 <canvas> backend has no specific dependencies, other than a browser supporting the HTML5 <canvas> element, of course.


The WebGL backend requires the glMatrix.js file (the one included in the friGame distribution) to be included in the HTML document.


The WebGL backend is higly experimental and it has not all the features found in the other backends.